drm/I915: Use the CRT DDC to get the EDID for DVI-connector on Mac

[mirror_ubuntu-zesty-kernel.git] / drivers / gpu / drm / i915 / intel_sdvo.c

/*
 * Copyright 2006 Dave Airlie <airlied@linux.ie>
 * Copyright © 2006-2007 Intel Corporation
 *   Jesse Barnes <jesse.barnes@intel.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 * Authors:
 *      Eric Anholt <eric@anholt.net>
 */
#include <linux/i2c.h>
#include <linux/delay.h>
#include "drmP.h"
#include "drm.h"
#include "drm_crtc.h"
#include "intel_drv.h"
#include "drm_edid.h"
#include "i915_drm.h"
#include "i915_drv.h"
#include "intel_sdvo_regs.h"

#undef SDVO_DEBUG
#define I915_SDVO       "i915_sdvo"
static char *tv_format_names[] = {
        "NTSC_M"   , "NTSC_J"  , "NTSC_443",
        "PAL_B"    , "PAL_D"   , "PAL_G"   ,
        "PAL_H"    , "PAL_I"   , "PAL_M"   ,
        "PAL_N"    , "PAL_NC"  , "PAL_60"  ,
        "SECAM_B"  , "SECAM_D" , "SECAM_G" ,
        "SECAM_K"  , "SECAM_K1", "SECAM_L" ,
        "SECAM_60"
};

#define TV_FORMAT_NUM  (sizeof(tv_format_names) / sizeof(*tv_format_names))

struct intel_sdvo_priv {
        u8 slave_addr;

        /* Register for the SDVO device: SDVOB or SDVOC */
        int output_device;

        /* Active outputs controlled by this SDVO output */
        uint16_t controlled_output;

        /*
         * Capabilities of the SDVO device returned by
         * i830_sdvo_get_capabilities()
         */
        struct intel_sdvo_caps caps;

        /* Pixel clock limitations reported by the SDVO device, in kHz */
        int pixel_clock_min, pixel_clock_max;

        /*
        * For multiple function SDVO device,
        * this is for current attached outputs.
        */
        uint16_t attached_output;

        /**
         * This is set if we're going to treat the device as TV-out.
         *
         * While we have these nice friendly flags for output types that ought
         * to decide this for us, the S-Video output on our HDMI+S-Video card
         * shows up as RGB1 (VGA).
         */
        bool is_tv;

        /* This is for current tv format name */
        char *tv_format_name;

        /* This contains all current supported TV format */
        char *tv_format_supported[TV_FORMAT_NUM];
        int   format_supported_num;
        struct drm_property *tv_format_property;
        struct drm_property *tv_format_name_property[TV_FORMAT_NUM];

        /**
         * This is set if we treat the device as HDMI, instead of DVI.
         */
        bool is_hdmi;

        /**
         * This is set if we detect output of sdvo device as LVDS.
         */
        bool is_lvds;

        /**
         * This is sdvo flags for input timing.
         */
        uint8_t sdvo_flags;

        /**
         * This is sdvo fixed pannel mode pointer
         */
        struct drm_display_mode *sdvo_lvds_fixed_mode;

        /**
         * Returned SDTV resolutions allowed for the current format, if the
         * device reported it.
         */
        struct intel_sdvo_sdtv_resolution_reply sdtv_resolutions;

        /*
         * supported encoding mode, used to determine whether HDMI is
         * supported
         */
        struct intel_sdvo_encode encode;

        /* DDC bus used by this SDVO output */
        uint8_t ddc_bus;

        /* Mac mini hack -- use the same DDC as the analog connector */
        struct i2c_adapter *analog_ddc_bus;

        int save_sdvo_mult;
        u16 save_active_outputs;
        struct intel_sdvo_dtd save_input_dtd_1, save_input_dtd_2;
        struct intel_sdvo_dtd save_output_dtd[16];
        u32 save_SDVOX;
};

static bool
intel_sdvo_output_setup(struct intel_output *intel_output, uint16_t flags);

/**
 * Writes the SDVOB or SDVOC with the given value, but always writes both
 * SDVOB and SDVOC to work around apparent hardware issues (according to
 * comments in the BIOS).
 */
static void intel_sdvo_write_sdvox(struct intel_output *intel_output, u32 val)
{
        struct drm_device *dev = intel_output->base.dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
        struct intel_sdvo_priv   *sdvo_priv = intel_output->dev_priv;
        u32 bval = val, cval = val;
        int i;

        if (sdvo_priv->output_device == SDVOB) {
                cval = I915_READ(SDVOC);
        } else {
                bval = I915_READ(SDVOB);
        }
        /*
         * Write the registers twice for luck. Sometimes,
         * writing them only once doesn't appear to 'stick'.
         * The BIOS does this too. Yay, magic
         */
        for (i = 0; i < 2; i++)
        {
                I915_WRITE(SDVOB, bval);
                I915_READ(SDVOB);
                I915_WRITE(SDVOC, cval);
                I915_READ(SDVOC);
        }
}

static bool intel_sdvo_read_byte(struct intel_output *intel_output, u8 addr,
                                 u8 *ch)
{
        struct intel_sdvo_priv *sdvo_priv = intel_output->dev_priv;
        u8 out_buf[2];
        u8 buf[2];
        int ret;

        struct i2c_msg msgs[] = {
                {
                        .addr = sdvo_priv->slave_addr >> 1,
                        .flags = 0,
                        .len = 1,
                        .buf = out_buf,
                },
                {
                        .addr = sdvo_priv->slave_addr >> 1,
                        .flags = I2C_M_RD,
                        .len = 1,
                        .buf = buf,
                }
        };

        out_buf[0] = addr;
        out_buf[1] = 0;

        if ((ret = i2c_transfer(intel_output->i2c_bus, msgs, 2)) == 2)
        {
                *ch = buf[0];
                return true;
        }

        DRM_DEBUG("i2c transfer returned %d\n", ret);
        return false;
}

static bool intel_sdvo_write_byte(struct intel_output *intel_output, int addr,
                                  u8 ch)
{
        struct intel_sdvo_priv *sdvo_priv = intel_output->dev_priv;
        u8 out_buf[2];
        struct i2c_msg msgs[] = {
                {
                        .addr = sdvo_priv->slave_addr >> 1,
                        .flags = 0,
                        .len = 2,
                        .buf = out_buf,
                }
        };

        out_buf[0] = addr;
        out_buf[1] = ch;

        if (i2c_transfer(intel_output->i2c_bus, msgs, 1) == 1)
        {
                return true;
        }
        return false;
}

#define SDVO_CMD_NAME_ENTRY(cmd) {cmd, #cmd}
/** Mapping of command numbers to names, for debug output */
static const struct _sdvo_cmd_name {
        u8 cmd;
        char *name;
} sdvo_cmd_names[] = {
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_RESET),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_DEVICE_CAPS),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_FIRMWARE_REV),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_TRAINED_INPUTS),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_ACTIVE_OUTPUTS),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_ACTIVE_OUTPUTS),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_IN_OUT_MAP),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_IN_OUT_MAP),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_ATTACHED_DISPLAYS),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_HOT_PLUG_SUPPORT),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_ACTIVE_HOT_PLUG),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_ACTIVE_HOT_PLUG),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_INTERRUPT_EVENT_SOURCE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_TARGET_INPUT),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_TARGET_OUTPUT),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_INPUT_TIMINGS_PART1),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_INPUT_TIMINGS_PART2),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_INPUT_TIMINGS_PART1),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_INPUT_TIMINGS_PART2),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_INPUT_TIMINGS_PART1),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_OUTPUT_TIMINGS_PART1),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_OUTPUT_TIMINGS_PART2),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_OUTPUT_TIMINGS_PART1),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_OUTPUT_TIMINGS_PART2),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_CREATE_PREFERRED_INPUT_TIMING),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_PREFERRED_INPUT_TIMING_PART1),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_PREFERRED_INPUT_TIMING_PART2),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_INPUT_PIXEL_CLOCK_RANGE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_OUTPUT_PIXEL_CLOCK_RANGE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_SUPPORTED_CLOCK_RATE_MULTS),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_CLOCK_RATE_MULT),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_CLOCK_RATE_MULT),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_SUPPORTED_TV_FORMATS),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_TV_FORMAT),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_TV_FORMAT),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_SUPPORTED_POWER_STATES),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_POWER_STATE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_ENCODER_POWER_STATE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_DISPLAY_POWER_STATE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_CONTROL_BUS_SWITCH),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_SDTV_RESOLUTION_SUPPORT),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_SCALED_HDTV_RESOLUTION_SUPPORT),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_SUPPORTED_ENHANCEMENTS),
    /* HDMI op code */
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_SUPP_ENCODE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_ENCODE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_ENCODE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_PIXEL_REPLI),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_PIXEL_REPLI),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_COLORIMETRY_CAP),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_COLORIMETRY),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_COLORIMETRY),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_AUDIO_ENCRYPT_PREFER),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_AUDIO_STAT),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_AUDIO_STAT),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_HBUF_INDEX),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_HBUF_INDEX),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_HBUF_INFO),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_HBUF_AV_SPLIT),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_HBUF_AV_SPLIT),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_HBUF_TXRATE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_HBUF_TXRATE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_HBUF_DATA),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_HBUF_DATA),
};

#define SDVO_NAME(dev_priv) ((dev_priv)->output_device == SDVOB ? "SDVOB" : "SDVOC")
#define SDVO_PRIV(output)   ((struct intel_sdvo_priv *) (output)->dev_priv)

#ifdef SDVO_DEBUG
static void intel_sdvo_debug_write(struct intel_output *intel_output, u8 cmd,
                                   void *args, int args_len)
{
        struct intel_sdvo_priv *sdvo_priv = intel_output->dev_priv;
        int i;

        DRM_DEBUG_KMS(I915_SDVO, "%s: W: %02X ",
                                SDVO_NAME(sdvo_priv), cmd);
        for (i = 0; i < args_len; i++)
                DRM_LOG_KMS("%02X ", ((u8 *)args)[i]);
        for (; i < 8; i++)
                DRM_LOG_KMS("   ");
        for (i = 0; i < sizeof(sdvo_cmd_names) / sizeof(sdvo_cmd_names[0]); i++) {
                if (cmd == sdvo_cmd_names[i].cmd) {
                        DRM_LOG_KMS("(%s)", sdvo_cmd_names[i].name);
                        break;
                }
        }
        if (i == sizeof(sdvo_cmd_names)/ sizeof(sdvo_cmd_names[0]))
                DRM_LOG_KMS("(%02X)", cmd);
        DRM_LOG_KMS("\n");
}
#else
#define intel_sdvo_debug_write(o, c, a, l)
#endif

static void intel_sdvo_write_cmd(struct intel_output *intel_output, u8 cmd,
                                 void *args, int args_len)
{
        int i;

        intel_sdvo_debug_write(intel_output, cmd, args, args_len);

        for (i = 0; i < args_len; i++) {
                intel_sdvo_write_byte(intel_output, SDVO_I2C_ARG_0 - i,
                                      ((u8*)args)[i]);
        }

        intel_sdvo_write_byte(intel_output, SDVO_I2C_OPCODE, cmd);
}

#ifdef SDVO_DEBUG
static const char *cmd_status_names[] = {
        "Power on",
        "Success",
        "Not supported",
        "Invalid arg",
        "Pending",
        "Target not specified",
        "Scaling not supported"
};

static void intel_sdvo_debug_response(struct intel_output *intel_output,
                                      void *response, int response_len,
                                      u8 status)
{
        struct intel_sdvo_priv *sdvo_priv = intel_output->dev_priv;
        int i;

        DRM_DEBUG_KMS(I915_SDVO, "%s: R: ", SDVO_NAME(sdvo_priv));
        for (i = 0; i < response_len; i++)
                DRM_LOG_KMS("%02X ", ((u8 *)response)[i]);
        for (; i < 8; i++)
                DRM_LOG_KMS("   ");
        if (status <= SDVO_CMD_STATUS_SCALING_NOT_SUPP)
                DRM_LOG_KMS("(%s)", cmd_status_names[status]);
        else
                DRM_LOG_KMS("(??? %d)", status);
        DRM_LOG_KMS("\n");
}
#else
#define intel_sdvo_debug_response(o, r, l, s)
#endif

static u8 intel_sdvo_read_response(struct intel_output *intel_output,
                                   void *response, int response_len)
{
        int i;
        u8 status;
        u8 retry = 50;

        while (retry--) {
                /* Read the command response */
                for (i = 0; i < response_len; i++) {
                        intel_sdvo_read_byte(intel_output,
                                             SDVO_I2C_RETURN_0 + i,
                                             &((u8 *)response)[i]);
                }

                /* read the return status */
                intel_sdvo_read_byte(intel_output, SDVO_I2C_CMD_STATUS,
                                     &status);

                intel_sdvo_debug_response(intel_output, response, response_len,
                                          status);
                if (status != SDVO_CMD_STATUS_PENDING)
                        return status;

                mdelay(50);
        }

        return status;
}

static int intel_sdvo_get_pixel_multiplier(struct drm_display_mode *mode)
{
        if (mode->clock >= 100000)
                return 1;
        else if (mode->clock >= 50000)
                return 2;
        else
                return 4;
}

/**
 * Don't check status code from this as it switches the bus back to the
 * SDVO chips which defeats the purpose of doing a bus switch in the first
 * place.
 */
static void intel_sdvo_set_control_bus_switch(struct intel_output *intel_output,
                                              u8 target)
{
        intel_sdvo_write_cmd(intel_output, SDVO_CMD_SET_CONTROL_BUS_SWITCH, &target, 1);
}

static bool intel_sdvo_set_target_input(struct intel_output *intel_output, bool target_0, bool target_1)
{
        struct intel_sdvo_set_target_input_args targets = {0};
        u8 status;

        if (target_0 && target_1)
                return SDVO_CMD_STATUS_NOTSUPP;

        if (target_1)
                targets.target_1 = 1;

        intel_sdvo_write_cmd(intel_output, SDVO_CMD_SET_TARGET_INPUT, &targets,
                             sizeof(targets));

        status = intel_sdvo_read_response(intel_output, NULL, 0);

        return (status == SDVO_CMD_STATUS_SUCCESS);
}

/**
 * Return whether each input is trained.
 *
 * This function is making an assumption about the layout of the response,
 * which should be checked against the docs.
 */
static bool intel_sdvo_get_trained_inputs(struct intel_output *intel_output, bool *input_1, bool *input_2)
{
        struct intel_sdvo_get_trained_inputs_response response;
        u8 status;

        intel_sdvo_write_cmd(intel_output, SDVO_CMD_GET_TRAINED_INPUTS, NULL, 0);
        status = intel_sdvo_read_response(intel_output, &response, sizeof(response));
        if (status != SDVO_CMD_STATUS_SUCCESS)
                return false;

        *input_1 = response.input0_trained;
        *input_2 = response.input1_trained;
        return true;
}

static bool intel_sdvo_get_active_outputs(struct intel_output *intel_output,
                                          u16 *outputs)
{
        u8 status;

        intel_sdvo_write_cmd(intel_output, SDVO_CMD_GET_ACTIVE_OUTPUTS, NULL, 0);
        status = intel_sdvo_read_response(intel_output, outputs, sizeof(*outputs));

        return (status == SDVO_CMD_STATUS_SUCCESS);
}

static bool intel_sdvo_set_active_outputs(struct intel_output *intel_output,
                                          u16 outputs)
{
        u8 status;

        intel_sdvo_write_cmd(intel_output, SDVO_CMD_SET_ACTIVE_OUTPUTS, &outputs,
                             sizeof(outputs));
        status = intel_sdvo_read_response(intel_output, NULL, 0);
        return (status == SDVO_CMD_STATUS_SUCCESS);
}

static bool intel_sdvo_set_encoder_power_state(struct intel_output *intel_output,
                                               int mode)
{
        u8 status, state = SDVO_ENCODER_STATE_ON;

        switch (mode) {
        case DRM_MODE_DPMS_ON:
                state = SDVO_ENCODER_STATE_ON;
                break;
        case DRM_MODE_DPMS_STANDBY:
                state = SDVO_ENCODER_STATE_STANDBY;
                break;
        case DRM_MODE_DPMS_SUSPEND:
                state = SDVO_ENCODER_STATE_SUSPEND;
                break;
        case DRM_MODE_DPMS_OFF:
                state = SDVO_ENCODER_STATE_OFF;
                break;
        }

        intel_sdvo_write_cmd(intel_output, SDVO_CMD_SET_ENCODER_POWER_STATE, &state,
                             sizeof(state));
        status = intel_sdvo_read_response(intel_output, NULL, 0);

        return (status == SDVO_CMD_STATUS_SUCCESS);
}

static bool intel_sdvo_get_input_pixel_clock_range(struct intel_output *intel_output,
                                                   int *clock_min,
                                                   int *clock_max)
{
        struct intel_sdvo_pixel_clock_range clocks;
        u8 status;

        intel_sdvo_write_cmd(intel_output, SDVO_CMD_GET_INPUT_PIXEL_CLOCK_RANGE,
                             NULL, 0);

        status = intel_sdvo_read_response(intel_output, &clocks, sizeof(clocks));

        if (status != SDVO_CMD_STATUS_SUCCESS)
                return false;

        /* Convert the values from units of 10 kHz to kHz. */
        *clock_min = clocks.min * 10;
        *clock_max = clocks.max * 10;

        return true;
}

static bool intel_sdvo_set_target_output(struct intel_output *intel_output,
                                         u16 outputs)
{
        u8 status;

        intel_sdvo_write_cmd(intel_output, SDVO_CMD_SET_TARGET_OUTPUT, &outputs,
                             sizeof(outputs));

        status = intel_sdvo_read_response(intel_output, NULL, 0);
        return (status == SDVO_CMD_STATUS_SUCCESS);
}

static bool intel_sdvo_get_timing(struct intel_output *intel_output, u8 cmd,
                                  struct intel_sdvo_dtd *dtd)
{
        u8 status;

        intel_sdvo_write_cmd(intel_output, cmd, NULL, 0);
        status = intel_sdvo_read_response(intel_output, &dtd->part1,
                                          sizeof(dtd->part1));
        if (status != SDVO_CMD_STATUS_SUCCESS)
                return false;

        intel_sdvo_write_cmd(intel_output, cmd + 1, NULL, 0);
        status = intel_sdvo_read_response(intel_output, &dtd->part2,
                                          sizeof(dtd->part2));
        if (status != SDVO_CMD_STATUS_SUCCESS)
                return false;

        return true;
}

static bool intel_sdvo_get_input_timing(struct intel_output *intel_output,
                                         struct intel_sdvo_dtd *dtd)
{
        return intel_sdvo_get_timing(intel_output,
                                     SDVO_CMD_GET_INPUT_TIMINGS_PART1, dtd);
}

static bool intel_sdvo_get_output_timing(struct intel_output *intel_output,
                                         struct intel_sdvo_dtd *dtd)
{
        return intel_sdvo_get_timing(intel_output,
                                     SDVO_CMD_GET_OUTPUT_TIMINGS_PART1, dtd);
}

static bool intel_sdvo_set_timing(struct intel_output *intel_output, u8 cmd,
                                  struct intel_sdvo_dtd *dtd)
{
        u8 status;

        intel_sdvo_write_cmd(intel_output, cmd, &dtd->part1, sizeof(dtd->part1));
        status = intel_sdvo_read_response(intel_output, NULL, 0);
        if (status != SDVO_CMD_STATUS_SUCCESS)
                return false;

        intel_sdvo_write_cmd(intel_output, cmd + 1, &dtd->part2, sizeof(dtd->part2));
        status = intel_sdvo_read_response(intel_output, NULL, 0);
        if (status != SDVO_CMD_STATUS_SUCCESS)
                return false;

        return true;
}

static bool intel_sdvo_set_input_timing(struct intel_output *intel_output,
                                         struct intel_sdvo_dtd *dtd)
{
        return intel_sdvo_set_timing(intel_output,
                                     SDVO_CMD_SET_INPUT_TIMINGS_PART1, dtd);
}

static bool intel_sdvo_set_output_timing(struct intel_output *intel_output,
                                         struct intel_sdvo_dtd *dtd)
{
        return intel_sdvo_set_timing(intel_output,
                                     SDVO_CMD_SET_OUTPUT_TIMINGS_PART1, dtd);
}

static bool
intel_sdvo_create_preferred_input_timing(struct intel_output *output,
                                         uint16_t clock,
                                         uint16_t width,
                                         uint16_t height)
{
        struct intel_sdvo_preferred_input_timing_args args;
        struct intel_sdvo_priv *sdvo_priv = output->dev_priv;
        uint8_t status;

        memset(&args, 0, sizeof(args));
        args.clock = clock;
        args.width = width;
        args.height = height;
        args.interlace = 0;

        if (sdvo_priv->is_lvds &&
           (sdvo_priv->sdvo_lvds_fixed_mode->hdisplay != width ||
            sdvo_priv->sdvo_lvds_fixed_mode->vdisplay != height))
                args.scaled = 1;

        intel_sdvo_write_cmd(output, SDVO_CMD_CREATE_PREFERRED_INPUT_TIMING,
                             &args, sizeof(args));
        status = intel_sdvo_read_response(output, NULL, 0);
        if (status != SDVO_CMD_STATUS_SUCCESS)
                return false;

        return true;
}

static bool intel_sdvo_get_preferred_input_timing(struct intel_output *output,
                                                  struct intel_sdvo_dtd *dtd)
{
        bool status;

        intel_sdvo_write_cmd(output, SDVO_CMD_GET_PREFERRED_INPUT_TIMING_PART1,
                             NULL, 0);

        status = intel_sdvo_read_response(output, &dtd->part1,
                                          sizeof(dtd->part1));
        if (status != SDVO_CMD_STATUS_SUCCESS)
                return false;

        intel_sdvo_write_cmd(output, SDVO_CMD_GET_PREFERRED_INPUT_TIMING_PART2,
                             NULL, 0);

        status = intel_sdvo_read_response(output, &dtd->part2,
                                          sizeof(dtd->part2));
        if (status != SDVO_CMD_STATUS_SUCCESS)
                return false;

        return false;
}

static int intel_sdvo_get_clock_rate_mult(struct intel_output *intel_output)
{
        u8 response, status;

        intel_sdvo_write_cmd(intel_output, SDVO_CMD_GET_CLOCK_RATE_MULT, NULL, 0);
        status = intel_sdvo_read_response(intel_output, &response, 1);

        if (status != SDVO_CMD_STATUS_SUCCESS) {
                DRM_DEBUG("Couldn't get SDVO clock rate multiplier\n");
                return SDVO_CLOCK_RATE_MULT_1X;
        } else {
                DRM_DEBUG("Current clock rate multiplier: %d\n", response);
        }

        return response;
}

static bool intel_sdvo_set_clock_rate_mult(struct intel_output *intel_output, u8 val)
{
        u8 status;

        intel_sdvo_write_cmd(intel_output, SDVO_CMD_SET_CLOCK_RATE_MULT, &val, 1);
        status = intel_sdvo_read_response(intel_output, NULL, 0);
        if (status != SDVO_CMD_STATUS_SUCCESS)
                return false;

        return true;
}

static void intel_sdvo_get_dtd_from_mode(struct intel_sdvo_dtd *dtd,
                                         struct drm_display_mode *mode)
{
        uint16_t width, height;
        uint16_t h_blank_len, h_sync_len, v_blank_len, v_sync_len;
        uint16_t h_sync_offset, v_sync_offset;

        width = mode->crtc_hdisplay;
        height = mode->crtc_vdisplay;

        /* do some mode translations */
        h_blank_len = mode->crtc_hblank_end - mode->crtc_hblank_start;
        h_sync_len = mode->crtc_hsync_end - mode->crtc_hsync_start;

        v_blank_len = mode->crtc_vblank_end - mode->crtc_vblank_start;
        v_sync_len = mode->crtc_vsync_end - mode->crtc_vsync_start;

        h_sync_offset = mode->crtc_hsync_start - mode->crtc_hblank_start;
        v_sync_offset = mode->crtc_vsync_start - mode->crtc_vblank_start;

        dtd->part1.clock = mode->clock / 10;
        dtd->part1.h_active = width & 0xff;
        dtd->part1.h_blank = h_blank_len & 0xff;
        dtd->part1.h_high = (((width >> 8) & 0xf) << 4) |
                ((h_blank_len >> 8) & 0xf);
        dtd->part1.v_active = height & 0xff;
        dtd->part1.v_blank = v_blank_len & 0xff;
        dtd->part1.v_high = (((height >> 8) & 0xf) << 4) |
                ((v_blank_len >> 8) & 0xf);

        dtd->part2.h_sync_off = h_sync_offset & 0xff;
        dtd->part2.h_sync_width = h_sync_len & 0xff;
        dtd->part2.v_sync_off_width = (v_sync_offset & 0xf) << 4 |
                (v_sync_len & 0xf);
        dtd->part2.sync_off_width_high = ((h_sync_offset & 0x300) >> 2) |
                ((h_sync_len & 0x300) >> 4) | ((v_sync_offset & 0x30) >> 2) |
                ((v_sync_len & 0x30) >> 4);

        dtd->part2.dtd_flags = 0x18;
        if (mode->flags & DRM_MODE_FLAG_PHSYNC)
                dtd->part2.dtd_flags |= 0x2;
        if (mode->flags & DRM_MODE_FLAG_PVSYNC)
                dtd->part2.dtd_flags |= 0x4;

        dtd->part2.sdvo_flags = 0;
        dtd->part2.v_sync_off_high = v_sync_offset & 0xc0;
        dtd->part2.reserved = 0;
}

static void intel_sdvo_get_mode_from_dtd(struct drm_display_mode * mode,
                                         struct intel_sdvo_dtd *dtd)
{
        mode->hdisplay = dtd->part1.h_active;
        mode->hdisplay += ((dtd->part1.h_high >> 4) & 0x0f) << 8;
        mode->hsync_start = mode->hdisplay + dtd->part2.h_sync_off;
        mode->hsync_start += (dtd->part2.sync_off_width_high & 0xc0) << 2;
        mode->hsync_end = mode->hsync_start + dtd->part2.h_sync_width;
        mode->hsync_end += (dtd->part2.sync_off_width_high & 0x30) << 4;
        mode->htotal = mode->hdisplay + dtd->part1.h_blank;
        mode->htotal += (dtd->part1.h_high & 0xf) << 8;

        mode->vdisplay = dtd->part1.v_active;
        mode->vdisplay += ((dtd->part1.v_high >> 4) & 0x0f) << 8;
        mode->vsync_start = mode->vdisplay;
        mode->vsync_start += (dtd->part2.v_sync_off_width >> 4) & 0xf;
        mode->vsync_start += (dtd->part2.sync_off_width_high & 0x0c) << 2;
        mode->vsync_start += dtd->part2.v_sync_off_high & 0xc0;
        mode->vsync_end = mode->vsync_start +
                (dtd->part2.v_sync_off_width & 0xf);
        mode->vsync_end += (dtd->part2.sync_off_width_high & 0x3) << 4;
        mode->vtotal = mode->vdisplay + dtd->part1.v_blank;
        mode->vtotal += (dtd->part1.v_high & 0xf) << 8;

        mode->clock = dtd->part1.clock * 10;

        mode->flags &= ~(DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC);
        if (dtd->part2.dtd_flags & 0x2)
                mode->flags |= DRM_MODE_FLAG_PHSYNC;
        if (dtd->part2.dtd_flags & 0x4)
                mode->flags |= DRM_MODE_FLAG_PVSYNC;
}

static bool intel_sdvo_get_supp_encode(struct intel_output *output,
                                       struct intel_sdvo_encode *encode)
{
        uint8_t status;

        intel_sdvo_write_cmd(output, SDVO_CMD_GET_SUPP_ENCODE, NULL, 0);
        status = intel_sdvo_read_response(output, encode, sizeof(*encode));
        if (status != SDVO_CMD_STATUS_SUCCESS) { /* non-support means DVI */
                memset(encode, 0, sizeof(*encode));
                return false;
        }

        return true;
}

static bool intel_sdvo_set_encode(struct intel_output *output, uint8_t mode)
{
        uint8_t status;

        intel_sdvo_write_cmd(output, SDVO_CMD_SET_ENCODE, &mode, 1);
        status = intel_sdvo_read_response(output, NULL, 0);

        return (status == SDVO_CMD_STATUS_SUCCESS);
}

static bool intel_sdvo_set_colorimetry(struct intel_output *output,
                                       uint8_t mode)
{
        uint8_t status;

        intel_sdvo_write_cmd(output, SDVO_CMD_SET_COLORIMETRY, &mode, 1);
        status = intel_sdvo_read_response(output, NULL, 0);

        return (status == SDVO_CMD_STATUS_SUCCESS);
}

#if 0
static void intel_sdvo_dump_hdmi_buf(struct intel_output *output)
{
        int i, j;
        uint8_t set_buf_index[2];
        uint8_t av_split;
        uint8_t buf_size;
        uint8_t buf[48];
        uint8_t *pos;

        intel_sdvo_write_cmd(output, SDVO_CMD_GET_HBUF_AV_SPLIT, NULL, 0);
        intel_sdvo_read_response(output, &av_split, 1);

        for (i = 0; i <= av_split; i++) {
                set_buf_index[0] = i; set_buf_index[1] = 0;
                intel_sdvo_write_cmd(output, SDVO_CMD_SET_HBUF_INDEX,
                                     set_buf_index, 2);
                intel_sdvo_write_cmd(output, SDVO_CMD_GET_HBUF_INFO, NULL, 0);
                intel_sdvo_read_response(output, &buf_size, 1);

                pos = buf;
                for (j = 0; j <= buf_size; j += 8) {
                        intel_sdvo_write_cmd(output, SDVO_CMD_GET_HBUF_DATA,
                                             NULL, 0);
                        intel_sdvo_read_response(output, pos, 8);
                        pos += 8;
                }
        }
}
#endif

static void intel_sdvo_set_hdmi_buf(struct intel_output *output, int index,
                                uint8_t *data, int8_t size, uint8_t tx_rate)
{
    uint8_t set_buf_index[2];

    set_buf_index[0] = index;
    set_buf_index[1] = 0;

    intel_sdvo_write_cmd(output, SDVO_CMD_SET_HBUF_INDEX, set_buf_index, 2);

    for (; size > 0; size -= 8) {
        intel_sdvo_write_cmd(output, SDVO_CMD_SET_HBUF_DATA, data, 8);
        data += 8;
    }

    intel_sdvo_write_cmd(output, SDVO_CMD_SET_HBUF_TXRATE, &tx_rate, 1);
}

static uint8_t intel_sdvo_calc_hbuf_csum(uint8_t *data, uint8_t size)
{
        uint8_t csum = 0;
        int i;

        for (i = 0; i < size; i++)
                csum += data[i];

        return 0x100 - csum;
}

#define DIP_TYPE_AVI    0x82
#define DIP_VERSION_AVI 0x2
#define DIP_LEN_AVI     13

struct dip_infoframe {
        uint8_t type;
        uint8_t version;
        uint8_t len;
        uint8_t checksum;
        union {
                struct {
                        /* Packet Byte #1 */
                        uint8_t S:2;
                        uint8_t B:2;
                        uint8_t A:1;
                        uint8_t Y:2;
                        uint8_t rsvd1:1;
                        /* Packet Byte #2 */
                        uint8_t R:4;
                        uint8_t M:2;
                        uint8_t C:2;
                        /* Packet Byte #3 */
                        uint8_t SC:2;
                        uint8_t Q:2;
                        uint8_t EC:3;
                        uint8_t ITC:1;
                        /* Packet Byte #4 */
                        uint8_t VIC:7;
                        uint8_t rsvd2:1;
                        /* Packet Byte #5 */
                        uint8_t PR:4;
                        uint8_t rsvd3:4;
                        /* Packet Byte #6~13 */
                        uint16_t top_bar_end;
                        uint16_t bottom_bar_start;
                        uint16_t left_bar_end;
                        uint16_t right_bar_start;
                } avi;
                struct {
                        /* Packet Byte #1 */
                        uint8_t channel_count:3;
                        uint8_t rsvd1:1;
                        uint8_t coding_type:4;
                        /* Packet Byte #2 */
                        uint8_t sample_size:2; /* SS0, SS1 */
                        uint8_t sample_frequency:3;
                        uint8_t rsvd2:3;
                        /* Packet Byte #3 */
                        uint8_t coding_type_private:5;
                        uint8_t rsvd3:3;
                        /* Packet Byte #4 */
                        uint8_t channel_allocation;
                        /* Packet Byte #5 */
                        uint8_t rsvd4:3;
                        uint8_t level_shift:4;
                        uint8_t downmix_inhibit:1;
                } audio;
                uint8_t payload[28];
        } __attribute__ ((packed)) u;
} __attribute__((packed));

static void intel_sdvo_set_avi_infoframe(struct intel_output *output,
                                         struct drm_display_mode * mode)
{
        struct dip_infoframe avi_if = {
                .type = DIP_TYPE_AVI,
                .version = DIP_VERSION_AVI,
                .len = DIP_LEN_AVI,
        };

        avi_if.checksum = intel_sdvo_calc_hbuf_csum((uint8_t *)&avi_if,
                                                    4 + avi_if.len);
        intel_sdvo_set_hdmi_buf(output, 1, (uint8_t *)&avi_if, 4 + avi_if.len,
                                SDVO_HBUF_TX_VSYNC);
}

static void intel_sdvo_set_tv_format(struct intel_output *output)
{

        struct intel_sdvo_tv_format format;
        struct intel_sdvo_priv *sdvo_priv = output->dev_priv;
        uint32_t format_map, i;
        uint8_t status;

        for (i = 0; i < TV_FORMAT_NUM; i++)
                if (tv_format_names[i] == sdvo_priv->tv_format_name)
                        break;

        format_map = 1 << i;
        memset(&format, 0, sizeof(format));
        memcpy(&format, &format_map, sizeof(format_map) > sizeof(format) ?
                        sizeof(format) : sizeof(format_map));

        intel_sdvo_write_cmd(output, SDVO_CMD_SET_TV_FORMAT, &format_map,
                             sizeof(format));

        status = intel_sdvo_read_response(output, NULL, 0);
        if (status != SDVO_CMD_STATUS_SUCCESS)
                DRM_DEBUG("%s: Failed to set TV format\n",
                          SDVO_NAME(sdvo_priv));
}

static bool intel_sdvo_mode_fixup(struct drm_encoder *encoder,
                                  struct drm_display_mode *mode,
                                  struct drm_display_mode *adjusted_mode)
{
        struct intel_output *output = enc_to_intel_output(encoder);
        struct intel_sdvo_priv *dev_priv = output->dev_priv;

        if (dev_priv->is_tv) {
                struct intel_sdvo_dtd output_dtd;
                bool success;

                /* We need to construct preferred input timings based on our
                 * output timings.  To do that, we have to set the output
                 * timings, even though this isn't really the right place in
                 * the sequence to do it. Oh well.
                 */


                /* Set output timings */
                intel_sdvo_get_dtd_from_mode(&output_dtd, mode);
                intel_sdvo_set_target_output(output,
                                             dev_priv->controlled_output);
                intel_sdvo_set_output_timing(output, &output_dtd);

                /* Set the input timing to the screen. Assume always input 0. */
                intel_sdvo_set_target_input(output, true, false);


                success = intel_sdvo_create_preferred_input_timing(output,
                                                                   mode->clock / 10,
                                                                   mode->hdisplay,
                                                                   mode->vdisplay);
                if (success) {
                        struct intel_sdvo_dtd input_dtd;

                        intel_sdvo_get_preferred_input_timing(output,
                                                             &input_dtd);
                        intel_sdvo_get_mode_from_dtd(adjusted_mode, &input_dtd);
                        dev_priv->sdvo_flags = input_dtd.part2.sdvo_flags;

                        drm_mode_set_crtcinfo(adjusted_mode, 0);

                        mode->clock = adjusted_mode->clock;

                        adjusted_mode->clock *=
                                intel_sdvo_get_pixel_multiplier(mode);
                } else {
                        return false;
                }
        } else if (dev_priv->is_lvds) {
                struct intel_sdvo_dtd output_dtd;
                bool success;

                drm_mode_set_crtcinfo(dev_priv->sdvo_lvds_fixed_mode, 0);
                /* Set output timings */
                intel_sdvo_get_dtd_from_mode(&output_dtd,
                                dev_priv->sdvo_lvds_fixed_mode);

                intel_sdvo_set_target_output(output,
                                             dev_priv->controlled_output);
                intel_sdvo_set_output_timing(output, &output_dtd);

                /* Set the input timing to the screen. Assume always input 0. */
                intel_sdvo_set_target_input(output, true, false);


                success = intel_sdvo_create_preferred_input_timing(
                                output,
                                mode->clock / 10,
                                mode->hdisplay,
                                mode->vdisplay);

                if (success) {
                        struct intel_sdvo_dtd input_dtd;

                        intel_sdvo_get_preferred_input_timing(output,
                                                             &input_dtd);
                        intel_sdvo_get_mode_from_dtd(adjusted_mode, &input_dtd);
                        dev_priv->sdvo_flags = input_dtd.part2.sdvo_flags;

                        drm_mode_set_crtcinfo(adjusted_mode, 0);

                        mode->clock = adjusted_mode->clock;

                        adjusted_mode->clock *=
                                intel_sdvo_get_pixel_multiplier(mode);
                } else {
                        return false;
                }

        } else {
                /* Make the CRTC code factor in the SDVO pixel multiplier.  The
                 * SDVO device will be told of the multiplier during mode_set.
                 */
                adjusted_mode->clock *= intel_sdvo_get_pixel_multiplier(mode);
        }
        return true;
}

static void intel_sdvo_mode_set(struct drm_encoder *encoder,
                                struct drm_display_mode *mode,
                                struct drm_display_mode *adjusted_mode)
{
        struct drm_device *dev = encoder->dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
        struct drm_crtc *crtc = encoder->crtc;
        struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
        struct intel_output *output = enc_to_intel_output(encoder);
        struct intel_sdvo_priv *sdvo_priv = output->dev_priv;
        u32 sdvox = 0;
        int sdvo_pixel_multiply;
        struct intel_sdvo_in_out_map in_out;
        struct intel_sdvo_dtd input_dtd;
        u8 status;

        if (!mode)
                return;

        /* First, set the input mapping for the first input to our controlled
         * output. This is only correct if we're a single-input device, in
         * which case the first input is the output from the appropriate SDVO
         * channel on the motherboard.  In a two-input device, the first input
         * will be SDVOB and the second SDVOC.
         */
        in_out.in0 = sdvo_priv->controlled_output;
        in_out.in1 = 0;

        intel_sdvo_write_cmd(output, SDVO_CMD_SET_IN_OUT_MAP,
                             &in_out, sizeof(in_out));
        status = intel_sdvo_read_response(output, NULL, 0);

        if (sdvo_priv->is_hdmi) {
                intel_sdvo_set_avi_infoframe(output, mode);
                sdvox |= SDVO_AUDIO_ENABLE;
        }

        /* We have tried to get input timing in mode_fixup, and filled into
           adjusted_mode */
        if (sdvo_priv->is_tv || sdvo_priv->is_lvds) {
                intel_sdvo_get_dtd_from_mode(&input_dtd, adjusted_mode);
                input_dtd.part2.sdvo_flags = sdvo_priv->sdvo_flags;
        } else
                intel_sdvo_get_dtd_from_mode(&input_dtd, mode);

        /* If it's a TV, we already set the output timing in mode_fixup.
         * Otherwise, the output timing is equal to the input timing.
         */
        if (!sdvo_priv->is_tv && !sdvo_priv->is_lvds) {
                /* Set the output timing to the screen */
                intel_sdvo_set_target_output(output,
                                             sdvo_priv->controlled_output);
                intel_sdvo_set_output_timing(output, &input_dtd);
        }

        /* Set the input timing to the screen. Assume always input 0. */
        intel_sdvo_set_target_input(output, true, false);

        if (sdvo_priv->is_tv)
                intel_sdvo_set_tv_format(output);

        /* We would like to use intel_sdvo_create_preferred_input_timing() to
         * provide the device with a timing it can support, if it supports that
         * feature.  However, presumably we would need to adjust the CRTC to
         * output the preferred timing, and we don't support that currently.
         */
#if 0
        success = intel_sdvo_create_preferred_input_timing(output, clock,
                                                           width, height);
        if (success) {
                struct intel_sdvo_dtd *input_dtd;

                intel_sdvo_get_preferred_input_timing(output, &input_dtd);
                intel_sdvo_set_input_timing(output, &input_dtd);
        }
#else
        intel_sdvo_set_input_timing(output, &input_dtd);
#endif

        switch (intel_sdvo_get_pixel_multiplier(mode)) {
        case 1:
                intel_sdvo_set_clock_rate_mult(output,
                                               SDVO_CLOCK_RATE_MULT_1X);
                break;
        case 2:
                intel_sdvo_set_clock_rate_mult(output,
                                               SDVO_CLOCK_RATE_MULT_2X);
                break;
        case 4:
                intel_sdvo_set_clock_rate_mult(output,
                                               SDVO_CLOCK_RATE_MULT_4X);
                break;
        }

        /* Set the SDVO control regs. */
        if (IS_I965G(dev)) {
                sdvox |= SDVO_BORDER_ENABLE |
                        SDVO_VSYNC_ACTIVE_HIGH |
                        SDVO_HSYNC_ACTIVE_HIGH;
        } else {
                sdvox |= I915_READ(sdvo_priv->output_device);
                switch (sdvo_priv->output_device) {
                case SDVOB:
                        sdvox &= SDVOB_PRESERVE_MASK;
                        break;
                case SDVOC:
                        sdvox &= SDVOC_PRESERVE_MASK;
                        break;
                }
                sdvox |= (9 << 19) | SDVO_BORDER_ENABLE;
        }
        if (intel_crtc->pipe == 1)
                sdvox |= SDVO_PIPE_B_SELECT;

        sdvo_pixel_multiply = intel_sdvo_get_pixel_multiplier(mode);
        if (IS_I965G(dev)) {
                /* done in crtc_mode_set as the dpll_md reg must be written early */
        } else if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev)) {
                /* done in crtc_mode_set as it lives inside the dpll register */
        } else {
                sdvox |= (sdvo_pixel_multiply - 1) << SDVO_PORT_MULTIPLY_SHIFT;
        }

        if (sdvo_priv->sdvo_flags & SDVO_NEED_TO_STALL)
                sdvox |= SDVO_STALL_SELECT;
        intel_sdvo_write_sdvox(output, sdvox);
}

static void intel_sdvo_dpms(struct drm_encoder *encoder, int mode)
{
        struct drm_device *dev = encoder->dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
        struct intel_output *intel_output = enc_to_intel_output(encoder);
        struct intel_sdvo_priv *sdvo_priv = intel_output->dev_priv;
        u32 temp;

        if (mode != DRM_MODE_DPMS_ON) {
                intel_sdvo_set_active_outputs(intel_output, 0);
                if (0)
                        intel_sdvo_set_encoder_power_state(intel_output, mode);

                if (mode == DRM_MODE_DPMS_OFF) {
                        temp = I915_READ(sdvo_priv->output_device);
                        if ((temp & SDVO_ENABLE) != 0) {
                                intel_sdvo_write_sdvox(intel_output, temp & ~SDVO_ENABLE);
                        }
                }
        } else {
                bool input1, input2;
                int i;
                u8 status;

                temp = I915_READ(sdvo_priv->output_device);
                if ((temp & SDVO_ENABLE) == 0)
                        intel_sdvo_write_sdvox(intel_output, temp | SDVO_ENABLE);
                for (i = 0; i < 2; i++)
                  intel_wait_for_vblank(dev);

                status = intel_sdvo_get_trained_inputs(intel_output, &input1,
                                                       &input2);


                /* Warn if the device reported failure to sync.
                 * A lot of SDVO devices fail to notify of sync, but it's
                 * a given it the status is a success, we succeeded.
                 */
                if (status == SDVO_CMD_STATUS_SUCCESS && !input1) {
                        DRM_DEBUG("First %s output reported failure to sync\n",
                                   SDVO_NAME(sdvo_priv));
                }

                if (0)
                        intel_sdvo_set_encoder_power_state(intel_output, mode);
                intel_sdvo_set_active_outputs(intel_output, sdvo_priv->controlled_output);
        }
        return;
}

static void intel_sdvo_save(struct drm_connector *connector)
{
        struct drm_device *dev = connector->dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
        struct intel_output *intel_output = to_intel_output(connector);
        struct intel_sdvo_priv *sdvo_priv = intel_output->dev_priv;
        int o;

        sdvo_priv->save_sdvo_mult = intel_sdvo_get_clock_rate_mult(intel_output);
        intel_sdvo_get_active_outputs(intel_output, &sdvo_priv->save_active_outputs);

        if (sdvo_priv->caps.sdvo_inputs_mask & 0x1) {
                intel_sdvo_set_target_input(intel_output, true, false);
                intel_sdvo_get_input_timing(intel_output,
                                            &sdvo_priv->save_input_dtd_1);
        }

        if (sdvo_priv->caps.sdvo_inputs_mask & 0x2) {
                intel_sdvo_set_target_input(intel_output, false, true);
                intel_sdvo_get_input_timing(intel_output,
                                            &sdvo_priv->save_input_dtd_2);
        }

        for (o = SDVO_OUTPUT_FIRST; o <= SDVO_OUTPUT_LAST; o++)
        {
                u16  this_output = (1 << o);
                if (sdvo_priv->caps.output_flags & this_output)
                {
                        intel_sdvo_set_target_output(intel_output, this_output);
                        intel_sdvo_get_output_timing(intel_output,
                                                     &sdvo_priv->save_output_dtd[o]);
                }
        }
        if (sdvo_priv->is_tv) {
                /* XXX: Save TV format/enhancements. */
        }

        sdvo_priv->save_SDVOX = I915_READ(sdvo_priv->output_device);
}

static void intel_sdvo_restore(struct drm_connector *connector)
{
        struct drm_device *dev = connector->dev;
        struct intel_output *intel_output = to_intel_output(connector);
        struct intel_sdvo_priv *sdvo_priv = intel_output->dev_priv;
        int o;
        int i;
        bool input1, input2;
        u8 status;

        intel_sdvo_set_active_outputs(intel_output, 0);

        for (o = SDVO_OUTPUT_FIRST; o <= SDVO_OUTPUT_LAST; o++)
        {
                u16  this_output = (1 << o);
                if (sdvo_priv->caps.output_flags & this_output) {
                        intel_sdvo_set_target_output(intel_output, this_output);
                        intel_sdvo_set_output_timing(intel_output, &sdvo_priv->save_output_dtd[o]);
                }
        }

        if (sdvo_priv->caps.sdvo_inputs_mask & 0x1) {
                intel_sdvo_set_target_input(intel_output, true, false);
                intel_sdvo_set_input_timing(intel_output, &sdvo_priv->save_input_dtd_1);
        }

        if (sdvo_priv->caps.sdvo_inputs_mask & 0x2) {
                intel_sdvo_set_target_input(intel_output, false, true);
                intel_sdvo_set_input_timing(intel_output, &sdvo_priv->save_input_dtd_2);
        }

        intel_sdvo_set_clock_rate_mult(intel_output, sdvo_priv->save_sdvo_mult);

        if (sdvo_priv->is_tv) {
                /* XXX: Restore TV format/enhancements. */
        }

        intel_sdvo_write_sdvox(intel_output, sdvo_priv->save_SDVOX);

        if (sdvo_priv->save_SDVOX & SDVO_ENABLE)
        {
                for (i = 0; i < 2; i++)
                        intel_wait_for_vblank(dev);
                status = intel_sdvo_get_trained_inputs(intel_output, &input1, &input2);
                if (status == SDVO_CMD_STATUS_SUCCESS && !input1)
                        DRM_DEBUG("First %s output reported failure to sync\n",
                                   SDVO_NAME(sdvo_priv));
        }

        intel_sdvo_set_active_outputs(intel_output, sdvo_priv->save_active_outputs);
}

static int intel_sdvo_mode_valid(struct drm_connector *connector,
                                 struct drm_display_mode *mode)
{
        struct intel_output *intel_output = to_intel_output(connector);
        struct intel_sdvo_priv *sdvo_priv = intel_output->dev_priv;

        if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
                return MODE_NO_DBLESCAN;

        if (sdvo_priv->pixel_clock_min > mode->clock)
                return MODE_CLOCK_LOW;

        if (sdvo_priv->pixel_clock_max < mode->clock)
                return MODE_CLOCK_HIGH;

        if (sdvo_priv->is_lvds == true) {
                if (sdvo_priv->sdvo_lvds_fixed_mode == NULL)
                        return MODE_PANEL;

                if (mode->hdisplay > sdvo_priv->sdvo_lvds_fixed_mode->hdisplay)
                        return MODE_PANEL;

                if (mode->vdisplay > sdvo_priv->sdvo_lvds_fixed_mode->vdisplay)
                        return MODE_PANEL;
        }

        return MODE_OK;
}

static bool intel_sdvo_get_capabilities(struct intel_output *intel_output, struct intel_sdvo_caps *caps)
{
        u8 status;

        intel_sdvo_write_cmd(intel_output, SDVO_CMD_GET_DEVICE_CAPS, NULL, 0);
        status = intel_sdvo_read_response(intel_output, caps, sizeof(*caps));
        if (status != SDVO_CMD_STATUS_SUCCESS)
                return false;

        return true;
}

struct drm_connector* intel_sdvo_find(struct drm_device *dev, int sdvoB)
{
        struct drm_connector *connector = NULL;
        struct intel_output *iout = NULL;
        struct intel_sdvo_priv *sdvo;

        /* find the sdvo connector */
        list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
                iout = to_intel_output(connector);

                if (iout->type != INTEL_OUTPUT_SDVO)
                        continue;

                sdvo = iout->dev_priv;

                if (sdvo->output_device == SDVOB && sdvoB)
                        return connector;

                if (sdvo->output_device == SDVOC && !sdvoB)
                        return connector;

        }

        return NULL;
}

int intel_sdvo_supports_hotplug(struct drm_connector *connector)
{
        u8 response[2];
        u8 status;
        struct intel_output *intel_output;
        DRM_DEBUG("\n");

        if (!connector)
                return 0;

        intel_output = to_intel_output(connector);

        intel_sdvo_write_cmd(intel_output, SDVO_CMD_GET_HOT_PLUG_SUPPORT, NULL, 0);
        status = intel_sdvo_read_response(intel_output, &response, 2);

        if (response[0] !=0)
                return 1;

        return 0;
}

void intel_sdvo_set_hotplug(struct drm_connector *connector, int on)
{
        u8 response[2];
        u8 status;
        struct intel_output *intel_output = to_intel_output(connector);

        intel_sdvo_write_cmd(intel_output, SDVO_CMD_GET_ACTIVE_HOT_PLUG, NULL, 0);
        intel_sdvo_read_response(intel_output, &response, 2);

        if (on) {
                intel_sdvo_write_cmd(intel_output, SDVO_CMD_GET_HOT_PLUG_SUPPORT, NULL, 0);
                status = intel_sdvo_read_response(intel_output, &response, 2);

                intel_sdvo_write_cmd(intel_output, SDVO_CMD_SET_ACTIVE_HOT_PLUG, &response, 2);
        } else {
                response[0] = 0;
                response[1] = 0;
                intel_sdvo_write_cmd(intel_output, SDVO_CMD_SET_ACTIVE_HOT_PLUG, &response, 2);
        }

        intel_sdvo_write_cmd(intel_output, SDVO_CMD_GET_ACTIVE_HOT_PLUG, NULL, 0);
        intel_sdvo_read_response(intel_output, &response, 2);
}

static bool
intel_sdvo_multifunc_encoder(struct intel_output *intel_output)
{
        struct intel_sdvo_priv *sdvo_priv = intel_output->dev_priv;
        int caps = 0;

        if (sdvo_priv->caps.output_flags &
                (SDVO_OUTPUT_TMDS0 | SDVO_OUTPUT_TMDS1))
                caps++;
        if (sdvo_priv->caps.output_flags &
                (SDVO_OUTPUT_RGB0 | SDVO_OUTPUT_RGB1))
                caps++;
        if (sdvo_priv->caps.output_flags &
                (SDVO_OUTPUT_SVID0 | SDVO_OUTPUT_SVID1))
                caps++;
        if (sdvo_priv->caps.output_flags &
                (SDVO_OUTPUT_CVBS0 | SDVO_OUTPUT_CVBS1))
                caps++;
        if (sdvo_priv->caps.output_flags &
                (SDVO_OUTPUT_YPRPB0 | SDVO_OUTPUT_YPRPB1))
                caps++;

        if (sdvo_priv->caps.output_flags &
                (SDVO_OUTPUT_SCART0 | SDVO_OUTPUT_SCART1))
                caps++;

        if (sdvo_priv->caps.output_flags &
                (SDVO_OUTPUT_LVDS0 | SDVO_OUTPUT_LVDS1))
                caps++;

        return (caps > 1);
}

static struct drm_connector *
intel_find_analog_connector(struct drm_device *dev)
{
        struct drm_connector *connector;
        struct intel_output *intel_output;

        list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
                intel_output = to_intel_output(connector);
                if (intel_output->type == INTEL_OUTPUT_ANALOG)
                        return connector;
        }
        return NULL;
}

static int
intel_analog_is_connected(struct drm_device *dev)
{
        struct drm_connector *analog_connector;
        analog_connector = intel_find_analog_connector(dev);

        if (!analog_connector)
                return false;

        if (analog_connector->funcs->detect(analog_connector) ==
                        connector_status_disconnected)
                return false;

        return true;
}

enum drm_connector_status
intel_sdvo_hdmi_sink_detect(struct drm_connector *connector, u16 response)
{
        struct intel_output *intel_output = to_intel_output(connector);
        struct intel_sdvo_priv *sdvo_priv = intel_output->dev_priv;
        enum drm_connector_status status = connector_status_connected;
        struct edid *edid = NULL;

        edid = drm_get_edid(&intel_output->base,
                            intel_output->ddc_bus);

        /* when there is no edid and no monitor is connected with VGA
         * port, try to use the CRT ddc to read the EDID for DVI-connector
         */
        if (edid == NULL &&
            sdvo_priv->analog_ddc_bus &&
            !intel_analog_is_connected(intel_output->base.dev))
                edid = drm_get_edid(&intel_output->base,
                                    sdvo_priv->analog_ddc_bus);
        if (edid != NULL) {
                /* Don't report the output as connected if it's a DVI-I
                 * connector with a non-digital EDID coming out.
                 */
                if (response & (SDVO_OUTPUT_TMDS0 | SDVO_OUTPUT_TMDS1)) {
                        if (edid->input & DRM_EDID_INPUT_DIGITAL)
                                sdvo_priv->is_hdmi =
                                        drm_detect_hdmi_monitor(edid);
                        else
                                status = connector_status_disconnected;
                }

                kfree(edid);
                intel_output->base.display_info.raw_edid = NULL;

        } else if (response & (SDVO_OUTPUT_TMDS0 | SDVO_OUTPUT_TMDS1))
                status = connector_status_disconnected;

        return status;
}

static enum drm_connector_status intel_sdvo_detect(struct drm_connector *connector)
{
        uint16_t response;
        u8 status;
        struct intel_output *intel_output = to_intel_output(connector);
        struct intel_sdvo_priv *sdvo_priv = intel_output->dev_priv;

        intel_sdvo_write_cmd(intel_output,
                             SDVO_CMD_GET_ATTACHED_DISPLAYS, NULL, 0);
        status = intel_sdvo_read_response(intel_output, &response, 2);

        DRM_DEBUG("SDVO response %d %d\n", response & 0xff, response >> 8);

        if (status != SDVO_CMD_STATUS_SUCCESS)
                return connector_status_unknown;

        if (response == 0)
                return connector_status_disconnected;

        if (intel_sdvo_multifunc_encoder(intel_output) &&
                sdvo_priv->attached_output != response) {
                if (sdvo_priv->controlled_output != response &&
                        intel_sdvo_output_setup(intel_output, response) != true)
                        return connector_status_unknown;
                sdvo_priv->attached_output = response;
        }
        return intel_sdvo_hdmi_sink_detect(connector, response);
}

static void intel_sdvo_get_ddc_modes(struct drm_connector *connector)
{
        struct intel_output *intel_output = to_intel_output(connector);
        struct intel_sdvo_priv *sdvo_priv = intel_output->dev_priv;
        int num_modes;

        /* set the bus switch and get the modes */
        num_modes = intel_ddc_get_modes(intel_output);

        /*
         * Mac mini hack.  On this device, the DVI-I connector shares one DDC
         * link between analog and digital outputs. So, if the regular SDVO
         * DDC fails, check to see if the analog output is disconnected, in
         * which case we'll look there for the digital DDC data.
         */
        if (num_modes == 0 &&
            sdvo_priv->analog_ddc_bus &&
            !intel_analog_is_connected(intel_output->base.dev)) {
                struct i2c_adapter *digital_ddc_bus;

                /* Switch to the analog ddc bus and try that
                 */
                digital_ddc_bus = intel_output->ddc_bus;
                intel_output->ddc_bus = sdvo_priv->analog_ddc_bus;

                (void) intel_ddc_get_modes(intel_output);

                intel_output->ddc_bus = digital_ddc_bus;
        }
}

/*
 * Set of SDVO TV modes.
 * Note!  This is in reply order (see loop in get_tv_modes).
 * XXX: all 60Hz refresh?
 */
struct drm_display_mode sdvo_tv_modes[] = {
        { DRM_MODE("320x200", DRM_MODE_TYPE_DRIVER, 5815, 320, 321, 384,
                   416, 0, 200, 201, 232, 233, 0,
                   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
        { DRM_MODE("320x240", DRM_MODE_TYPE_DRIVER, 6814, 320, 321, 384,
                   416, 0, 240, 241, 272, 273, 0,
                   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
        { DRM_MODE("400x300", DRM_MODE_TYPE_DRIVER, 9910, 400, 401, 464,
                   496, 0, 300, 301, 332, 333, 0,
                   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
        { DRM_MODE("640x350", DRM_MODE_TYPE_DRIVER, 16913, 640, 641, 704,
                   736, 0, 350, 351, 382, 383, 0,
                   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
        { DRM_MODE("640x400", DRM_MODE_TYPE_DRIVER, 19121, 640, 641, 704,
                   736, 0, 400, 401, 432, 433, 0,
                   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
        { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 22654, 640, 641, 704,
                   736, 0, 480, 481, 512, 513, 0,
                   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
        { DRM_MODE("704x480", DRM_MODE_TYPE_DRIVER, 24624, 704, 705, 768,
                   800, 0, 480, 481, 512, 513, 0,
                   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
        { DRM_MODE("704x576", DRM_MODE_TYPE_DRIVER, 29232, 704, 705, 768,
                   800, 0, 576, 577, 608, 609, 0,
                   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
        { DRM_MODE("720x350", DRM_MODE_TYPE_DRIVER, 18751, 720, 721, 784,
                   816, 0, 350, 351, 382, 383, 0,
                   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
        { DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 21199, 720, 721, 784,
                   816, 0, 400, 401, 432, 433, 0,
                   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
        { DRM_MODE("720x480", DRM_MODE_TYPE_DRIVER, 25116, 720, 721, 784,
                   816, 0, 480, 481, 512, 513, 0,
                   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
        { DRM_MODE("720x540", DRM_MODE_TYPE_DRIVER, 28054, 720, 721, 784,
                   816, 0, 540, 541, 572, 573, 0,
                   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
        { DRM_MODE("720x576", DRM_MODE_TYPE_DRIVER, 29816, 720, 721, 784,
                   816, 0, 576, 577, 608, 609, 0,
                   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
        { DRM_MODE("768x576", DRM_MODE_TYPE_DRIVER, 31570, 768, 769, 832,
                   864, 0, 576, 577, 608, 609, 0,
                   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
        { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 34030, 800, 801, 864,
                   896, 0, 600, 601, 632, 633, 0,
                   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
        { DRM_MODE("832x624", DRM_MODE_TYPE_DRIVER, 36581, 832, 833, 896,
                   928, 0, 624, 625, 656, 657, 0,
                   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
        { DRM_MODE("920x766", DRM_MODE_TYPE_DRIVER, 48707, 920, 921, 984,
                   1016, 0, 766, 767, 798, 799, 0,
                   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
        { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 53827, 1024, 1025, 1088,
                   1120, 0, 768, 769, 800, 801, 0,
                   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
        { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 87265, 1280, 1281, 1344,
                   1376, 0, 1024, 1025, 1056, 1057, 0,
                   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
};

static void intel_sdvo_get_tv_modes(struct drm_connector *connector)
{
        struct intel_output *output = to_intel_output(connector);
        struct intel_sdvo_priv *sdvo_priv = output->dev_priv;
        struct intel_sdvo_sdtv_resolution_request tv_res;
        uint32_t reply = 0, format_map = 0;
        int i;
        uint8_t status;


        /* Read the list of supported input resolutions for the selected TV
         * format.
         */
        for (i = 0; i < TV_FORMAT_NUM; i++)
                if (tv_format_names[i] ==  sdvo_priv->tv_format_name)
                        break;

        format_map = (1 << i);
        memcpy(&tv_res, &format_map,
               sizeof(struct intel_sdvo_sdtv_resolution_request) >
               sizeof(format_map) ? sizeof(format_map) :
               sizeof(struct intel_sdvo_sdtv_resolution_request));

        intel_sdvo_set_target_output(output, sdvo_priv->controlled_output);

        intel_sdvo_write_cmd(output, SDVO_CMD_GET_SDTV_RESOLUTION_SUPPORT,
                             &tv_res, sizeof(tv_res));
        status = intel_sdvo_read_response(output, &reply, 3);
        if (status != SDVO_CMD_STATUS_SUCCESS)
                return;

        for (i = 0; i < ARRAY_SIZE(sdvo_tv_modes); i++)
                if (reply & (1 << i)) {
                        struct drm_display_mode *nmode;
                        nmode = drm_mode_duplicate(connector->dev,
                                        &sdvo_tv_modes[i]);
                        if (nmode)
                                drm_mode_probed_add(connector, nmode);
                }

}

static void intel_sdvo_get_lvds_modes(struct drm_connector *connector)
{
        struct intel_output *intel_output = to_intel_output(connector);
        struct drm_i915_private *dev_priv = connector->dev->dev_private;
        struct intel_sdvo_priv *sdvo_priv = intel_output->dev_priv;
        struct drm_display_mode *newmode;

        /*
         * Attempt to get the mode list from DDC.
         * Assume that the preferred modes are
         * arranged in priority order.
         */
        intel_ddc_get_modes(intel_output);
        if (list_empty(&connector->probed_modes) == false)
                goto end;

        /* Fetch modes from VBT */
        if (dev_priv->sdvo_lvds_vbt_mode != NULL) {
                newmode = drm_mode_duplicate(connector->dev,
                                             dev_priv->sdvo_lvds_vbt_mode);
                if (newmode != NULL) {
                        /* Guarantee the mode is preferred */
                        newmode->type = (DRM_MODE_TYPE_PREFERRED |
                                         DRM_MODE_TYPE_DRIVER);
                        drm_mode_probed_add(connector, newmode);
                }
        }

end:
        list_for_each_entry(newmode, &connector->probed_modes, head) {
                if (newmode->type & DRM_MODE_TYPE_PREFERRED) {
                        sdvo_priv->sdvo_lvds_fixed_mode =
                                drm_mode_duplicate(connector->dev, newmode);
                        break;
                }
        }

}

static int intel_sdvo_get_modes(struct drm_connector *connector)
{
        struct intel_output *output = to_intel_output(connector);
        struct intel_sdvo_priv *sdvo_priv = output->dev_priv;

        if (sdvo_priv->is_tv)
                intel_sdvo_get_tv_modes(connector);
        else if (sdvo_priv->is_lvds == true)
                intel_sdvo_get_lvds_modes(connector);
        else
                intel_sdvo_get_ddc_modes(connector);

        if (list_empty(&connector->probed_modes))
                return 0;
        return 1;
}

static void intel_sdvo_destroy(struct drm_connector *connector)
{
        struct intel_output *intel_output = to_intel_output(connector);
        struct intel_sdvo_priv *sdvo_priv = intel_output->dev_priv;

        if (intel_output->i2c_bus)
                intel_i2c_destroy(intel_output->i2c_bus);
        if (intel_output->ddc_bus)
                intel_i2c_destroy(intel_output->ddc_bus);
        if (sdvo_priv->analog_ddc_bus)
                intel_i2c_destroy(sdvo_priv->analog_ddc_bus);

        if (sdvo_priv->sdvo_lvds_fixed_mode != NULL)
                drm_mode_destroy(connector->dev,
                                 sdvo_priv->sdvo_lvds_fixed_mode);

        if (sdvo_priv->tv_format_property)
                drm_property_destroy(connector->dev,
                                     sdvo_priv->tv_format_property);

        drm_sysfs_connector_remove(connector);
        drm_connector_cleanup(connector);

        kfree(intel_output);
}

static int
intel_sdvo_set_property(struct drm_connector *connector,
                        struct drm_property *property,
                        uint64_t val)
{
        struct intel_output *intel_output = to_intel_output(connector);
        struct intel_sdvo_priv *sdvo_priv = intel_output->dev_priv;
        struct drm_encoder *encoder = &intel_output->enc;
        struct drm_crtc *crtc = encoder->crtc;
        int ret = 0;
        bool changed = false;

        ret = drm_connector_property_set_value(connector, property, val);
        if (ret < 0)
                goto out;

        if (property == sdvo_priv->tv_format_property) {
                if (val >= TV_FORMAT_NUM) {
                        ret = -EINVAL;
                        goto out;
                }
                if (sdvo_priv->tv_format_name ==
                    sdvo_priv->tv_format_supported[val])
                        goto out;

                sdvo_priv->tv_format_name = sdvo_priv->tv_format_supported[val];
                changed = true;
        } else {
                ret = -EINVAL;
                goto out;
        }

        if (changed && crtc)
                drm_crtc_helper_set_mode(crtc, &crtc->mode, crtc->x,
                                crtc->y, crtc->fb);
out:
        return ret;
}

static const struct drm_encoder_helper_funcs intel_sdvo_helper_funcs = {
        .dpms = intel_sdvo_dpms,
        .mode_fixup = intel_sdvo_mode_fixup,
        .prepare = intel_encoder_prepare,
        .mode_set = intel_sdvo_mode_set,
        .commit = intel_encoder_commit,
};

static const struct drm_connector_funcs intel_sdvo_connector_funcs = {
        .dpms = drm_helper_connector_dpms,
        .save = intel_sdvo_save,
        .restore = intel_sdvo_restore,
        .detect = intel_sdvo_detect,
        .fill_modes = drm_helper_probe_single_connector_modes,
        .set_property = intel_sdvo_set_property,
        .destroy = intel_sdvo_destroy,
};

static const struct drm_connector_helper_funcs intel_sdvo_connector_helper_funcs = {
        .get_modes = intel_sdvo_get_modes,
        .mode_valid = intel_sdvo_mode_valid,
        .best_encoder = intel_best_encoder,
};

static void intel_sdvo_enc_destroy(struct drm_encoder *encoder)
{
        drm_encoder_cleanup(encoder);
}

static const struct drm_encoder_funcs intel_sdvo_enc_funcs = {
        .destroy = intel_sdvo_enc_destroy,
};


/**
 * Choose the appropriate DDC bus for control bus switch command for this
 * SDVO output based on the controlled output.
 *
 * DDC bus number assignment is in a priority order of RGB outputs, then TMDS
 * outputs, then LVDS outputs.
 */
static void
intel_sdvo_select_ddc_bus(struct intel_sdvo_priv *dev_priv)
{
        uint16_t mask = 0;
        unsigned int num_bits;

        /* Make a mask of outputs less than or equal to our own priority in the
         * list.
         */
        switch (dev_priv->controlled_output) {
        case SDVO_OUTPUT_LVDS1:
                mask |= SDVO_OUTPUT_LVDS1;
        case SDVO_OUTPUT_LVDS0:
                mask |= SDVO_OUTPUT_LVDS0;
        case SDVO_OUTPUT_TMDS1:
                mask |= SDVO_OUTPUT_TMDS1;
        case SDVO_OUTPUT_TMDS0:
                mask |= SDVO_OUTPUT_TMDS0;
        case SDVO_OUTPUT_RGB1:
                mask |= SDVO_OUTPUT_RGB1;
        case SDVO_OUTPUT_RGB0:
                mask |= SDVO_OUTPUT_RGB0;
                break;
        }

        /* Count bits to find what number we are in the priority list. */
        mask &= dev_priv->caps.output_flags;
        num_bits = hweight16(mask);
        if (num_bits > 3) {
                /* if more than 3 outputs, default to DDC bus 3 for now */
                num_bits = 3;
        }

        /* Corresponds to SDVO_CONTROL_BUS_DDCx */
        dev_priv->ddc_bus = 1 << num_bits;
}

static bool
intel_sdvo_get_digital_encoding_mode(struct intel_output *output)
{
        struct intel_sdvo_priv *sdvo_priv = output->dev_priv;
        uint8_t status;

        intel_sdvo_set_target_output(output, sdvo_priv->controlled_output);

        intel_sdvo_write_cmd(output, SDVO_CMD_GET_ENCODE, NULL, 0);
        status = intel_sdvo_read_response(output, &sdvo_priv->is_hdmi, 1);
        if (status != SDVO_CMD_STATUS_SUCCESS)
                return false;
        return true;
}

static struct intel_output *
intel_sdvo_chan_to_intel_output(struct intel_i2c_chan *chan)
{
        struct drm_device *dev = chan->drm_dev;
        struct drm_connector *connector;
        struct intel_output *intel_output = NULL;

        list_for_each_entry(connector,
                        &dev->mode_config.connector_list, head) {
                if (to_intel_output(connector)->ddc_bus == &chan->adapter) {
                        intel_output = to_intel_output(connector);
                        break;
                }
        }
        return intel_output;
}

static int intel_sdvo_master_xfer(struct i2c_adapter *i2c_adap,
                                  struct i2c_msg msgs[], int num)
{
        struct intel_output *intel_output;
        struct intel_sdvo_priv *sdvo_priv;
        struct i2c_algo_bit_data *algo_data;
        const struct i2c_algorithm *algo;

        algo_data = (struct i2c_algo_bit_data *)i2c_adap->algo_data;
        intel_output =
                intel_sdvo_chan_to_intel_output(
                                (struct intel_i2c_chan *)(algo_data->data));
        if (intel_output == NULL)
                return -EINVAL;

        sdvo_priv = intel_output->dev_priv;
        algo = intel_output->i2c_bus->algo;

        intel_sdvo_set_control_bus_switch(intel_output, sdvo_priv->ddc_bus);
        return algo->master_xfer(i2c_adap, msgs, num);
}

static struct i2c_algorithm intel_sdvo_i2c_bit_algo = {
        .master_xfer    = intel_sdvo_master_xfer,
};

static u8
intel_sdvo_get_slave_addr(struct drm_device *dev, int output_device)
{
        struct drm_i915_private *dev_priv = dev->dev_private;
        struct sdvo_device_mapping *my_mapping, *other_mapping;

        if (output_device == SDVOB) {
                my_mapping = &dev_priv->sdvo_mappings[0];
                other_mapping = &dev_priv->sdvo_mappings[1];
        } else {
                my_mapping = &dev_priv->sdvo_mappings[1];
                other_mapping = &dev_priv->sdvo_mappings[0];
        }

        /* If the BIOS described our SDVO device, take advantage of it. */
        if (my_mapping->slave_addr)
                return my_mapping->slave_addr;

        /* If the BIOS only described a different SDVO device, use the
         * address that it isn't using.
         */
        if (other_mapping->slave_addr) {
                if (other_mapping->slave_addr == 0x70)
                        return 0x72;
                else
                        return 0x70;
        }

        /* No SDVO device info is found for another DVO port,
         * so use mapping assumption we had before BIOS parsing.
         */
        if (output_device == SDVOB)
                return 0x70;
        else
                return 0x72;
}

static bool
intel_sdvo_output_setup(struct intel_output *intel_output, uint16_t flags)
{
        struct drm_connector *connector = &intel_output->base;
        struct drm_encoder *encoder = &intel_output->enc;
        struct intel_sdvo_priv *sdvo_priv = intel_output->dev_priv;
        bool ret = true, registered = false;

        sdvo_priv->is_tv = false;
        intel_output->needs_tv_clock = false;
        sdvo_priv->is_lvds = false;

        if (device_is_registered(&connector->kdev)) {
                drm_sysfs_connector_remove(connector);
                registered = true;
        }

        if (flags &
            (SDVO_OUTPUT_TMDS0 | SDVO_OUTPUT_TMDS1)) {
                if (sdvo_priv->caps.output_flags & SDVO_OUTPUT_TMDS0)
                        sdvo_priv->controlled_output = SDVO_OUTPUT_TMDS0;
                else
                        sdvo_priv->controlled_output = SDVO_OUTPUT_TMDS1;

                encoder->encoder_type = DRM_MODE_ENCODER_TMDS;
                connector->connector_type = DRM_MODE_CONNECTOR_DVID;

                if (intel_sdvo_get_supp_encode(intel_output,
                                               &sdvo_priv->encode) &&
                    intel_sdvo_get_digital_encoding_mode(intel_output) &&
                    sdvo_priv->is_hdmi) {
                        /* enable hdmi encoding mode if supported */
                        intel_sdvo_set_encode(intel_output, SDVO_ENCODE_HDMI);
                        intel_sdvo_set_colorimetry(intel_output,
                                                   SDVO_COLORIMETRY_RGB256);
                        connector->connector_type = DRM_MODE_CONNECTOR_HDMIA;
                        intel_output->clone_mask =
                                        (1 << INTEL_SDVO_NON_TV_CLONE_BIT) |
                                        (1 << INTEL_ANALOG_CLONE_BIT);
                }
        } else if (flags & SDVO_OUTPUT_SVID0) {

                sdvo_priv->controlled_output = SDVO_OUTPUT_SVID0;
                encoder->encoder_type = DRM_MODE_ENCODER_TVDAC;
                connector->connector_type = DRM_MODE_CONNECTOR_SVIDEO;
                sdvo_priv->is_tv = true;
                intel_output->needs_tv_clock = true;
                intel_output->clone_mask = 1 << INTEL_SDVO_TV_CLONE_BIT;
        } else if (flags & SDVO_OUTPUT_RGB0) {

                sdvo_priv->controlled_output = SDVO_OUTPUT_RGB0;
                encoder->encoder_type = DRM_MODE_ENCODER_DAC;
                connector->connector_type = DRM_MODE_CONNECTOR_VGA;
                intel_output->clone_mask = (1 << INTEL_SDVO_NON_TV_CLONE_BIT) |
                                        (1 << INTEL_ANALOG_CLONE_BIT);
        } else if (flags & SDVO_OUTPUT_RGB1) {

                sdvo_priv->controlled_output = SDVO_OUTPUT_RGB1;
                encoder->encoder_type = DRM_MODE_ENCODER_DAC;
                connector->connector_type = DRM_MODE_CONNECTOR_VGA;
        } else if (flags & SDVO_OUTPUT_LVDS0) {

                sdvo_priv->controlled_output = SDVO_OUTPUT_LVDS0;
                encoder->encoder_type = DRM_MODE_ENCODER_LVDS;
                connector->connector_type = DRM_MODE_CONNECTOR_LVDS;
                sdvo_priv->is_lvds = true;
                intel_output->clone_mask = (1 << INTEL_ANALOG_CLONE_BIT) |
                                        (1 << INTEL_SDVO_LVDS_CLONE_BIT);
        } else if (flags & SDVO_OUTPUT_LVDS1) {

                sdvo_priv->controlled_output = SDVO_OUTPUT_LVDS1;
                encoder->encoder_type = DRM_MODE_ENCODER_LVDS;
                connector->connector_type = DRM_MODE_CONNECTOR_LVDS;
                sdvo_priv->is_lvds = true;
                intel_output->clone_mask = (1 << INTEL_ANALOG_CLONE_BIT) |
                                        (1 << INTEL_SDVO_LVDS_CLONE_BIT);
        } else {

                unsigned char bytes[2];

                sdvo_priv->controlled_output = 0;
                memcpy(bytes, &sdvo_priv->caps.output_flags, 2);
                DRM_DEBUG_KMS(I915_SDVO,
                                "%s: Unknown SDVO output type (0x%02x%02x)\n",
                                  SDVO_NAME(sdvo_priv),
                                  bytes[0], bytes[1]);
                ret = false;
        }
        intel_output->crtc_mask = (1 << 0) | (1 << 1);

        if (ret && registered)
                ret = drm_sysfs_connector_add(connector) == 0 ? true : false;


        return ret;

}

static void intel_sdvo_tv_create_property(struct drm_connector *connector)
{
      struct intel_output *intel_output = to_intel_output(connector);
        struct intel_sdvo_priv *sdvo_priv = intel_output->dev_priv;
        struct intel_sdvo_tv_format format;
        uint32_t format_map, i;
        uint8_t status;

        intel_sdvo_set_target_output(intel_output,
                                     sdvo_priv->controlled_output);

        intel_sdvo_write_cmd(intel_output,
                             SDVO_CMD_GET_SUPPORTED_TV_FORMATS, NULL, 0);
        status = intel_sdvo_read_response(intel_output,
                                          &format, sizeof(format));
        if (status != SDVO_CMD_STATUS_SUCCESS)
                return;

        memcpy(&format_map, &format, sizeof(format) > sizeof(format_map) ?
               sizeof(format_map) : sizeof(format));

        if (format_map == 0)
                return;

        sdvo_priv->format_supported_num = 0;
        for (i = 0 ; i < TV_FORMAT_NUM; i++)
                if (format_map & (1 << i)) {
                        sdvo_priv->tv_format_supported
                        [sdvo_priv->format_supported_num++] =
                        tv_format_names[i];
                }


        sdvo_priv->tv_format_property =
                        drm_property_create(
                                connector->dev, DRM_MODE_PROP_ENUM,
                                "mode", sdvo_priv->format_supported_num);

        for (i = 0; i < sdvo_priv->format_supported_num; i++)
                drm_property_add_enum(
                                sdvo_priv->tv_format_property, i,
                                i, sdvo_priv->tv_format_supported[i]);

        sdvo_priv->tv_format_name = sdvo_priv->tv_format_supported[0];
        drm_connector_attach_property(
                        connector, sdvo_priv->tv_format_property, 0);

}

bool intel_sdvo_init(struct drm_device *dev, int output_device)
{
        struct drm_connector *connector;
        struct intel_output *intel_output;
        struct intel_sdvo_priv *sdvo_priv;

        u8 ch[0x40];
        int i;

        intel_output = kcalloc(sizeof(struct intel_output)+sizeof(struct intel_sdvo_priv), 1, GFP_KERNEL);
        if (!intel_output) {
                return false;
        }

        sdvo_priv = (struct intel_sdvo_priv *)(intel_output + 1);
        sdvo_priv->output_device = output_device;

        intel_output->dev_priv = sdvo_priv;
        intel_output->type = INTEL_OUTPUT_SDVO;

        /* setup the DDC bus. */
        if (output_device == SDVOB)
                intel_output->i2c_bus = intel_i2c_create(dev, GPIOE, "SDVOCTRL_E for SDVOB");
        else
                intel_output->i2c_bus = intel_i2c_create(dev, GPIOE, "SDVOCTRL_E for SDVOC");

        if (!intel_output->i2c_bus)
                goto err_inteloutput;

        sdvo_priv->slave_addr = intel_sdvo_get_slave_addr(dev, output_device);

        /* Save the bit-banging i2c functionality for use by the DDC wrapper */
        intel_sdvo_i2c_bit_algo.functionality = intel_output->i2c_bus->algo->functionality;

        /* Read the regs to test if we can talk to the device */
        for (i = 0; i < 0x40; i++) {
                if (!intel_sdvo_read_byte(intel_output, i, &ch[i])) {
                        DRM_DEBUG_KMS(I915_SDVO,
                                        "No SDVO device found on SDVO%c\n",
                                        output_device == SDVOB ? 'B' : 'C');
                        goto err_i2c;
                }
        }

        /* setup the DDC bus. */
        if (output_device == SDVOB) {
                intel_output->ddc_bus = intel_i2c_create(dev, GPIOE, "SDVOB DDC BUS");
                sdvo_priv->analog_ddc_bus = intel_i2c_create(dev, GPIOA,
                                                "SDVOB/VGA DDC BUS");
        } else {
                intel_output->ddc_bus = intel_i2c_create(dev, GPIOE, "SDVOC DDC BUS");
                sdvo_priv->analog_ddc_bus = intel_i2c_create(dev, GPIOA,
                                                "SDVOC/VGA DDC BUS");
        }

        if (intel_output->ddc_bus == NULL)
                goto err_i2c;

        /* Wrap with our custom algo which switches to DDC mode */
        intel_output->ddc_bus->algo = &intel_sdvo_i2c_bit_algo;

        /* In defaut case sdvo lvds is false */
        intel_sdvo_get_capabilities(intel_output, &sdvo_priv->caps);

        if (intel_sdvo_output_setup(intel_output,
                                    sdvo_priv->caps.output_flags) != true) {
                DRM_DEBUG("SDVO output failed to setup on SDVO%c\n",
                          output_device == SDVOB ? 'B' : 'C');
                goto err_i2c;
        }


        connector = &intel_output->base;
        drm_connector_init(dev, connector, &intel_sdvo_connector_funcs,
                           connector->connector_type);

        drm_connector_helper_add(connector, &intel_sdvo_connector_helper_funcs);
        connector->interlace_allowed = 0;
        connector->doublescan_allowed = 0;
        connector->display_info.subpixel_order = SubPixelHorizontalRGB;

        drm_encoder_init(dev, &intel_output->enc,
                        &intel_sdvo_enc_funcs, intel_output->enc.encoder_type);

        drm_encoder_helper_add(&intel_output->enc, &intel_sdvo_helper_funcs);

        drm_mode_connector_attach_encoder(&intel_output->base, &intel_output->enc);
        if (sdvo_priv->is_tv)
                intel_sdvo_tv_create_property(connector);
        drm_sysfs_connector_add(connector);

        intel_sdvo_select_ddc_bus(sdvo_priv);

        /* Set the input timing to the screen. Assume always input 0. */
        intel_sdvo_set_target_input(intel_output, true, false);

        intel_sdvo_get_input_pixel_clock_range(intel_output,
                                               &sdvo_priv->pixel_clock_min,
                                               &sdvo_priv->pixel_clock_max);


        DRM_DEBUG_KMS(I915_SDVO, "%s device VID/DID: %02X:%02X.%02X, "
                        "clock range %dMHz - %dMHz, "
                        "input 1: %c, input 2: %c, "
                        "output 1: %c, output 2: %c\n",
                        SDVO_NAME(sdvo_priv),
                        sdvo_priv->caps.vendor_id, sdvo_priv->caps.device_id,
                        sdvo_priv->caps.device_rev_id,
                        sdvo_priv->pixel_clock_min / 1000,
                        sdvo_priv->pixel_clock_max / 1000,
                        (sdvo_priv->caps.sdvo_inputs_mask & 0x1) ? 'Y' : 'N',
                        (sdvo_priv->caps.sdvo_inputs_mask & 0x2) ? 'Y' : 'N',
                        /* check currently supported outputs */
                        sdvo_priv->caps.output_flags &
                        (SDVO_OUTPUT_TMDS0 | SDVO_OUTPUT_RGB0) ? 'Y' : 'N',
                        sdvo_priv->caps.output_flags &
                        (SDVO_OUTPUT_TMDS1 | SDVO_OUTPUT_RGB1) ? 'Y' : 'N');

        return true;

err_i2c:
        if (sdvo_priv->analog_ddc_bus != NULL)
                intel_i2c_destroy(sdvo_priv->analog_ddc_bus);
        if (intel_output->ddc_bus != NULL)
                intel_i2c_destroy(intel_output->ddc_bus);
        if (intel_output->i2c_bus != NULL)
                intel_i2c_destroy(intel_output->i2c_bus);
err_inteloutput:
        kfree(intel_output);

        return false;
}