[mirror_ubuntu-artful-kernel.git] / drivers / gpu / drm / i915 / intel_dvo.c

/*
 * Copyright 2006 Dave Airlie <airlied@linux.ie>
 * Copyright © 2006-2007 Intel Corporation
 *
 * 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/slab.h>
#include "drmP.h"
#include "drm.h"
#include "drm_crtc.h"
#include "intel_drv.h"
#include "i915_drm.h"
#include "i915_drv.h"
#include "dvo.h"

#define SIL164_ADDR	0x38
#define CH7xxx_ADDR	0x76
#define TFP410_ADDR	0x38
#define NS2501_ADDR     0x38

static const struct intel_dvo_device intel_dvo_devices[] = {
	{
		.type = INTEL_DVO_CHIP_TMDS,
		.name = "sil164",
		.dvo_reg = DVOC,
		.slave_addr = SIL164_ADDR,
		.dev_ops = &sil164_ops,
	},
	{
		.type = INTEL_DVO_CHIP_TMDS,
		.name = "ch7xxx",
		.dvo_reg = DVOC,
		.slave_addr = CH7xxx_ADDR,
		.dev_ops = &ch7xxx_ops,
	},
	{
		.type = INTEL_DVO_CHIP_LVDS,
		.name = "ivch",
		.dvo_reg = DVOA,
		.slave_addr = 0x02, /* Might also be 0x44, 0x84, 0xc4 */
		.dev_ops = &ivch_ops,
	},
	{
		.type = INTEL_DVO_CHIP_TMDS,
		.name = "tfp410",
		.dvo_reg = DVOC,
		.slave_addr = TFP410_ADDR,
		.dev_ops = &tfp410_ops,
	},
	{
		.type = INTEL_DVO_CHIP_LVDS,
		.name = "ch7017",
		.dvo_reg = DVOC,
		.slave_addr = 0x75,
		.gpio = GMBUS_PORT_DPB,
		.dev_ops = &ch7017_ops,
	},
	{
	        .type = INTEL_DVO_CHIP_TMDS,
		.name = "ns2501",
		.dvo_reg = DVOC,
		.slave_addr = NS2501_ADDR,
		.dev_ops = &ns2501_ops,
       }
};

struct intel_dvo {
	struct intel_encoder base;

	struct intel_dvo_device dev;

	struct drm_display_mode *panel_fixed_mode;
	bool panel_wants_dither;
};

static struct intel_dvo *enc_to_intel_dvo(struct drm_encoder *encoder)
{
	return container_of(encoder, struct intel_dvo, base.base);
}

static struct intel_dvo *intel_attached_dvo(struct drm_connector *connector)
{
	return container_of(intel_attached_encoder(connector),
			    struct intel_dvo, base);
}

static void intel_dvo_dpms(struct drm_encoder *encoder, int mode)
{
	struct drm_i915_private *dev_priv = encoder->dev->dev_private;
	struct intel_dvo *intel_dvo = enc_to_intel_dvo(encoder);
	u32 dvo_reg = intel_dvo->dev.dvo_reg;
	u32 temp = I915_READ(dvo_reg);

	if (mode == DRM_MODE_DPMS_ON) {
		I915_WRITE(dvo_reg, temp | DVO_ENABLE);
		I915_READ(dvo_reg);
		intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, true);
	} else {
		intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, false);
		I915_WRITE(dvo_reg, temp & ~DVO_ENABLE);
		I915_READ(dvo_reg);
	}
}

static int intel_dvo_mode_valid(struct drm_connector *connector,
				struct drm_display_mode *mode)
{
	struct intel_dvo *intel_dvo = intel_attached_dvo(connector);

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

	/* XXX: Validate clock range */

	if (intel_dvo->panel_fixed_mode) {
		if (mode->hdisplay > intel_dvo->panel_fixed_mode->hdisplay)
			return MODE_PANEL;
		if (mode->vdisplay > intel_dvo->panel_fixed_mode->vdisplay)
			return MODE_PANEL;
	}

	return intel_dvo->dev.dev_ops->mode_valid(&intel_dvo->dev, mode);
}

static bool intel_dvo_mode_fixup(struct drm_encoder *encoder,
				 const struct drm_display_mode *mode,
				 struct drm_display_mode *adjusted_mode)
{
	struct intel_dvo *intel_dvo = enc_to_intel_dvo(encoder);

	/* If we have timings from the BIOS for the panel, put them in
	 * to the adjusted mode.  The CRTC will be set up for this mode,
	 * with the panel scaling set up to source from the H/VDisplay
	 * of the original mode.
	 */
	if (intel_dvo->panel_fixed_mode != NULL) {
#define C(x) adjusted_mode->x = intel_dvo->panel_fixed_mode->x
		C(hdisplay);
		C(hsync_start);
		C(hsync_end);
		C(htotal);
		C(vdisplay);
		C(vsync_start);
		C(vsync_end);
		C(vtotal);
		C(clock);
#undef C
	}

	if (intel_dvo->dev.dev_ops->mode_fixup)
		return intel_dvo->dev.dev_ops->mode_fixup(&intel_dvo->dev, mode, adjusted_mode);

	return true;
}

static void intel_dvo_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 intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
	struct intel_dvo *intel_dvo = enc_to_intel_dvo(encoder);
	int pipe = intel_crtc->pipe;
	u32 dvo_val;
	u32 dvo_reg = intel_dvo->dev.dvo_reg, dvo_srcdim_reg;
	int dpll_reg = DPLL(pipe);

	switch (dvo_reg) {
	case DVOA:
	default:
		dvo_srcdim_reg = DVOA_SRCDIM;
		break;
	case DVOB:
		dvo_srcdim_reg = DVOB_SRCDIM;
		break;
	case DVOC:
		dvo_srcdim_reg = DVOC_SRCDIM;
		break;
	}

	intel_dvo->dev.dev_ops->mode_set(&intel_dvo->dev, mode, adjusted_mode);

	/* Save the data order, since I don't know what it should be set to. */
	dvo_val = I915_READ(dvo_reg) &
		  (DVO_PRESERVE_MASK | DVO_DATA_ORDER_GBRG);
	dvo_val |= DVO_DATA_ORDER_FP | DVO_BORDER_ENABLE |
		   DVO_BLANK_ACTIVE_HIGH;

	if (pipe == 1)
		dvo_val |= DVO_PIPE_B_SELECT;
	dvo_val |= DVO_PIPE_STALL;
	if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
		dvo_val |= DVO_HSYNC_ACTIVE_HIGH;
	if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
		dvo_val |= DVO_VSYNC_ACTIVE_HIGH;

	I915_WRITE(dpll_reg, I915_READ(dpll_reg) | DPLL_DVO_HIGH_SPEED);

	/*I915_WRITE(DVOB_SRCDIM,
	  (adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) |
	  (adjusted_mode->VDisplay << DVO_SRCDIM_VERTICAL_SHIFT));*/
	I915_WRITE(dvo_srcdim_reg,
		   (adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) |
		   (adjusted_mode->vdisplay << DVO_SRCDIM_VERTICAL_SHIFT));
	/*I915_WRITE(DVOB, dvo_val);*/
	I915_WRITE(dvo_reg, dvo_val);
}

/**
 * Detect the output connection on our DVO device.
 *
 * Unimplemented.
 */
static enum drm_connector_status
intel_dvo_detect(struct drm_connector *connector, bool force)
{
	struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
	return intel_dvo->dev.dev_ops->detect(&intel_dvo->dev);
}

static int intel_dvo_get_modes(struct drm_connector *connector)
{
	struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
	struct drm_i915_private *dev_priv = connector->dev->dev_private;

	/* We should probably have an i2c driver get_modes function for those
	 * devices which will have a fixed set of modes determined by the chip
	 * (TV-out, for example), but for now with just TMDS and LVDS,
	 * that's not the case.
	 */
	intel_ddc_get_modes(connector,
			    intel_gmbus_get_adapter(dev_priv, GMBUS_PORT_DPC));
	if (!list_empty(&connector->probed_modes))
		return 1;

	if (intel_dvo->panel_fixed_mode != NULL) {
		struct drm_display_mode *mode;
		mode = drm_mode_duplicate(connector->dev, intel_dvo->panel_fixed_mode);
		if (mode) {
			drm_mode_probed_add(connector, mode);
			return 1;
		}
	}

	return 0;
}

static void intel_dvo_destroy(struct drm_connector *connector)
{
	drm_sysfs_connector_remove(connector);
	drm_connector_cleanup(connector);
	kfree(connector);
}

static const struct drm_encoder_helper_funcs intel_dvo_helper_funcs = {
	.dpms = intel_dvo_dpms,
	.mode_fixup = intel_dvo_mode_fixup,
	.prepare = intel_encoder_prepare,
	.mode_set = intel_dvo_mode_set,
	.commit = intel_encoder_commit,
};

static const struct drm_connector_funcs intel_dvo_connector_funcs = {
	.dpms = drm_helper_connector_dpms,
	.detect = intel_dvo_detect,
	.destroy = intel_dvo_destroy,
	.fill_modes = drm_helper_probe_single_connector_modes,
};

static const struct drm_connector_helper_funcs intel_dvo_connector_helper_funcs = {
	.mode_valid = intel_dvo_mode_valid,
	.get_modes = intel_dvo_get_modes,
	.best_encoder = intel_best_encoder,
};

static void intel_dvo_enc_destroy(struct drm_encoder *encoder)
{
	struct intel_dvo *intel_dvo = enc_to_intel_dvo(encoder);

	if (intel_dvo->dev.dev_ops->destroy)
		intel_dvo->dev.dev_ops->destroy(&intel_dvo->dev);

	kfree(intel_dvo->panel_fixed_mode);

	intel_encoder_destroy(encoder);
}

static const struct drm_encoder_funcs intel_dvo_enc_funcs = {
	.destroy = intel_dvo_enc_destroy,
};

/**
 * Attempts to get a fixed panel timing for LVDS (currently only the i830).
 *
 * Other chips with DVO LVDS will need to extend this to deal with the LVDS
 * chip being on DVOB/C and having multiple pipes.
 */
static struct drm_display_mode *
intel_dvo_get_current_mode(struct drm_connector *connector)
{
	struct drm_device *dev = connector->dev;
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
	uint32_t dvo_val = I915_READ(intel_dvo->dev.dvo_reg);
	struct drm_display_mode *mode = NULL;

	/* If the DVO port is active, that'll be the LVDS, so we can pull out
	 * its timings to get how the BIOS set up the panel.
	 */
	if (dvo_val & DVO_ENABLE) {
		struct drm_crtc *crtc;
		int pipe = (dvo_val & DVO_PIPE_B_SELECT) ? 1 : 0;

		crtc = intel_get_crtc_for_pipe(dev, pipe);
		if (crtc) {
			mode = intel_crtc_mode_get(dev, crtc);
			if (mode) {
				mode->type |= DRM_MODE_TYPE_PREFERRED;
				if (dvo_val & DVO_HSYNC_ACTIVE_HIGH)
					mode->flags |= DRM_MODE_FLAG_PHSYNC;
				if (dvo_val & DVO_VSYNC_ACTIVE_HIGH)
					mode->flags |= DRM_MODE_FLAG_PVSYNC;
			}
		}
	}

	return mode;
}

void intel_dvo_init(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct intel_encoder *intel_encoder;
	struct intel_dvo *intel_dvo;
	struct intel_connector *intel_connector;
	int i;
	int encoder_type = DRM_MODE_ENCODER_NONE;

	intel_dvo = kzalloc(sizeof(struct intel_dvo), GFP_KERNEL);
	if (!intel_dvo)
		return;

	intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
	if (!intel_connector) {
		kfree(intel_dvo);
		return;
	}

	intel_encoder = &intel_dvo->base;
	drm_encoder_init(dev, &intel_encoder->base,
			 &intel_dvo_enc_funcs, encoder_type);

	/* Now, try to find a controller */
	for (i = 0; i < ARRAY_SIZE(intel_dvo_devices); i++) {
		struct drm_connector *connector = &intel_connector->base;
		const struct intel_dvo_device *dvo = &intel_dvo_devices[i];
		struct i2c_adapter *i2c;
		int gpio;

		/* Allow the I2C driver info to specify the GPIO to be used in
		 * special cases, but otherwise default to what's defined
		 * in the spec.
		 */
		if (intel_gmbus_is_port_valid(dvo->gpio))
			gpio = dvo->gpio;
		else if (dvo->type == INTEL_DVO_CHIP_LVDS)
			gpio = GMBUS_PORT_SSC;
		else
			gpio = GMBUS_PORT_DPB;

		/* Set up the I2C bus necessary for the chip we're probing.
		 * It appears that everything is on GPIOE except for panels
		 * on i830 laptops, which are on GPIOB (DVOA).
		 */
		i2c = intel_gmbus_get_adapter(dev_priv, gpio);

		intel_dvo->dev = *dvo;
		if (!dvo->dev_ops->init(&intel_dvo->dev, i2c))
			continue;

		intel_encoder->type = INTEL_OUTPUT_DVO;
		intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
		switch (dvo->type) {
		case INTEL_DVO_CHIP_TMDS:
			intel_encoder->cloneable = true;
			drm_connector_init(dev, connector,
					   &intel_dvo_connector_funcs,
					   DRM_MODE_CONNECTOR_DVII);
			encoder_type = DRM_MODE_ENCODER_TMDS;
			break;
		case INTEL_DVO_CHIP_LVDS:
			intel_encoder->cloneable = false;
			drm_connector_init(dev, connector,
					   &intel_dvo_connector_funcs,
					   DRM_MODE_CONNECTOR_LVDS);
			encoder_type = DRM_MODE_ENCODER_LVDS;
			break;
		}

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

		drm_encoder_helper_add(&intel_encoder->base,
				       &intel_dvo_helper_funcs);

		intel_connector_attach_encoder(intel_connector, intel_encoder);
		if (dvo->type == INTEL_DVO_CHIP_LVDS) {
			/* For our LVDS chipsets, we should hopefully be able
			 * to dig the fixed panel mode out of the BIOS data.
			 * However, it's in a different format from the BIOS
			 * data on chipsets with integrated LVDS (stored in AIM
			 * headers, likely), so for now, just get the current
			 * mode being output through DVO.
			 */
			intel_dvo->panel_fixed_mode =
				intel_dvo_get_current_mode(connector);
			intel_dvo->panel_wants_dither = true;
		}

		drm_sysfs_connector_add(connector);
		return;
	}

	drm_encoder_cleanup(&intel_encoder->base);
	kfree(intel_dvo);
	kfree(intel_connector);
}
Commit	Line	Data
79e53945 JB	1	/*
	2	* Copyright 2006 Dave Airlie <airlied@linux.ie>
	3	* Copyright © 2006-2007 Intel Corporation
	4	*
	5	* Permission is hereby granted, free of charge, to any person obtaining a
	6	* copy of this software and associated documentation files (the "Software"),
	7	* to deal in the Software without restriction, including without limitation
	8	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	9	* and/or sell copies of the Software, and to permit persons to whom the
	10	* Software is furnished to do so, subject to the following conditions:
	11	*
	12	* The above copyright notice and this permission notice (including the next
	13	* paragraph) shall be included in all copies or substantial portions of the
	14	* Software.
	15	*
	16	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	17	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	19	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	20	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
	21	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
	22	* DEALINGS IN THE SOFTWARE.
	23	*
	24	* Authors:
	25	* Eric Anholt <eric@anholt.net>
	26	*/
	27	#include <linux/i2c.h>
5a0e3ad6	28	#include <linux/slab.h>
79e53945 JB	29	#include "drmP.h"
	30	#include "drm.h"
	31	#include "drm_crtc.h"
	32	#include "intel_drv.h"
	33	#include "i915_drm.h"
	34	#include "i915_drv.h"
	35	#include "dvo.h"
	36
	37	#define SIL164_ADDR 0x38
	38	#define CH7xxx_ADDR 0x76
	39	#define TFP410_ADDR 0x38
7434a255	40	#define NS2501_ADDR 0x38
79e53945	41
ea5b213a	42	static const struct intel_dvo_device intel_dvo_devices[] = {
79e53945 JB	43	{
	44	.type = INTEL_DVO_CHIP_TMDS,
	45	.name = "sil164",
	46	.dvo_reg = DVOC,
	47	.slave_addr = SIL164_ADDR,
	48	.dev_ops = &sil164_ops,
	49	},
	50	{
	51	.type = INTEL_DVO_CHIP_TMDS,
	52	.name = "ch7xxx",
	53	.dvo_reg = DVOC,
	54	.slave_addr = CH7xxx_ADDR,
	55	.dev_ops = &ch7xxx_ops,
	56	},
	57	{
	58	.type = INTEL_DVO_CHIP_LVDS,
	59	.name = "ivch",
	60	.dvo_reg = DVOA,
	61	.slave_addr = 0x02, /* Might also be 0x44, 0x84, 0xc4 */
	62	.dev_ops = &ivch_ops,
	63	},
	64	{
	65	.type = INTEL_DVO_CHIP_TMDS,
	66	.name = "tfp410",
	67	.dvo_reg = DVOC,
	68	.slave_addr = TFP410_ADDR,
	69	.dev_ops = &tfp410_ops,
	70	},
	71	{
	72	.type = INTEL_DVO_CHIP_LVDS,
	73	.name = "ch7017",
	74	.dvo_reg = DVOC,
	75	.slave_addr = 0x75,
a6b17b43	76	.gpio = GMBUS_PORT_DPB,
79e53945	77	.dev_ops = &ch7017_ops,
7434a255 TR	78	},
	79	{
	80	.type = INTEL_DVO_CHIP_TMDS,
	81	.name = "ns2501",
	82	.dvo_reg = DVOC,
	83	.slave_addr = NS2501_ADDR,
	84	.dev_ops = &ns2501_ops,
	85	}
79e53945 JB	86	};
79e53945 JB	87
ea5b213a CW	88	struct intel_dvo {
	89	struct intel_encoder base;
	90
	91	struct intel_dvo_device dev;
	92
	93	struct drm_display_mode *panel_fixed_mode;
	94	bool panel_wants_dither;
	95	};
	96
	97	static struct intel_dvo enc_to_intel_dvo(struct drm_encoder encoder)
	98	{
4ef69c7a	99	return container_of(encoder, struct intel_dvo, base.base);
ea5b213a CW	100	}
ea5b213a CW	101
df0e9248 CW	102	static struct intel_dvo intel_attached_dvo(struct drm_connector connector)
	103	{
	104	return container_of(intel_attached_encoder(connector),
	105	struct intel_dvo, base);
	106	}
	107
79e53945 JB	108	static void intel_dvo_dpms(struct drm_encoder *encoder, int mode)
	109	{
	110	struct drm_i915_private *dev_priv = encoder->dev->dev_private;
ea5b213a CW	111	struct intel_dvo *intel_dvo = enc_to_intel_dvo(encoder);
ea5b213a CW	112	u32 dvo_reg = intel_dvo->dev.dvo_reg;
79e53945 JB	113	u32 temp = I915_READ(dvo_reg);
	114
	115	if (mode == DRM_MODE_DPMS_ON) {
	116	I915_WRITE(dvo_reg, temp \| DVO_ENABLE);
	117	I915_READ(dvo_reg);
fac3274c	118	intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, true);
79e53945	119	} else {
fac3274c	120	intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, false);
79e53945 JB	121	I915_WRITE(dvo_reg, temp & ~DVO_ENABLE);
	122	I915_READ(dvo_reg);
	123	}
	124	}
	125
79e53945 JB	126	static int intel_dvo_mode_valid(struct drm_connector *connector,
	127	struct drm_display_mode *mode)
	128	{
df0e9248	129	struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
79e53945 JB	130
	131	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
	132	return MODE_NO_DBLESCAN;
	133
	134	/* XXX: Validate clock range */
	135
ea5b213a CW	136	if (intel_dvo->panel_fixed_mode) {
ea5b213a CW	137	if (mode->hdisplay > intel_dvo->panel_fixed_mode->hdisplay)
79e53945	138	return MODE_PANEL;
ea5b213a	139	if (mode->vdisplay > intel_dvo->panel_fixed_mode->vdisplay)
79e53945 JB	140	return MODE_PANEL;
	141	}
	142
ea5b213a	143	return intel_dvo->dev.dev_ops->mode_valid(&intel_dvo->dev, mode);
79e53945 JB	144	}
	145
	146	static bool intel_dvo_mode_fixup(struct drm_encoder *encoder,
e811f5ae	147	const struct drm_display_mode *mode,
79e53945 JB	148	struct drm_display_mode *adjusted_mode)
79e53945 JB	149	{
ea5b213a	150	struct intel_dvo *intel_dvo = enc_to_intel_dvo(encoder);
79e53945 JB	151
	152	/* If we have timings from the BIOS for the panel, put them in
	153	* to the adjusted mode. The CRTC will be set up for this mode,
	154	* with the panel scaling set up to source from the H/VDisplay
	155	* of the original mode.
	156	*/
ea5b213a CW	157	if (intel_dvo->panel_fixed_mode != NULL) {
ea5b213a CW	158	#define C(x) adjusted_mode->x = intel_dvo->panel_fixed_mode->x
79e53945 JB	159	C(hdisplay);
	160	C(hsync_start);
	161	C(hsync_end);
	162	C(htotal);
	163	C(vdisplay);
	164	C(vsync_start);
	165	C(vsync_end);
	166	C(vtotal);
	167	C(clock);
79e53945 JB	168	#undef C
	169	}
	170
ea5b213a CW	171	if (intel_dvo->dev.dev_ops->mode_fixup)
ea5b213a CW	172	return intel_dvo->dev.dev_ops->mode_fixup(&intel_dvo->dev, mode, adjusted_mode);
79e53945 JB	173
	174	return true;
	175	}
	176
	177	static void intel_dvo_mode_set(struct drm_encoder *encoder,
	178	struct drm_display_mode *mode,
	179	struct drm_display_mode *adjusted_mode)
	180	{
	181	struct drm_device *dev = encoder->dev;
	182	struct drm_i915_private *dev_priv = dev->dev_private;
	183	struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
ea5b213a	184	struct intel_dvo *intel_dvo = enc_to_intel_dvo(encoder);
79e53945 JB	185	int pipe = intel_crtc->pipe;
79e53945 JB	186	u32 dvo_val;
ea5b213a	187	u32 dvo_reg = intel_dvo->dev.dvo_reg, dvo_srcdim_reg;
9db4a9c7	188	int dpll_reg = DPLL(pipe);
79e53945 JB	189
	190	switch (dvo_reg) {
	191	case DVOA:
	192	default:
	193	dvo_srcdim_reg = DVOA_SRCDIM;
	194	break;
	195	case DVOB:
	196	dvo_srcdim_reg = DVOB_SRCDIM;
	197	break;
	198	case DVOC:
	199	dvo_srcdim_reg = DVOC_SRCDIM;
	200	break;
	201	}
	202
ea5b213a	203	intel_dvo->dev.dev_ops->mode_set(&intel_dvo->dev, mode, adjusted_mode);
79e53945 JB	204
	205	/* Save the data order, since I don't know what it should be set to. */
	206	dvo_val = I915_READ(dvo_reg) &
	207	(DVO_PRESERVE_MASK \| DVO_DATA_ORDER_GBRG);
	208	dvo_val \|= DVO_DATA_ORDER_FP \| DVO_BORDER_ENABLE \|
	209	DVO_BLANK_ACTIVE_HIGH;
	210
	211	if (pipe == 1)
	212	dvo_val \|= DVO_PIPE_B_SELECT;
	213	dvo_val \|= DVO_PIPE_STALL;
	214	if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
	215	dvo_val \|= DVO_HSYNC_ACTIVE_HIGH;
	216	if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
	217	dvo_val \|= DVO_VSYNC_ACTIVE_HIGH;
	218
	219	I915_WRITE(dpll_reg, I915_READ(dpll_reg) \| DPLL_DVO_HIGH_SPEED);
	220
	221	/*I915_WRITE(DVOB_SRCDIM,
	222	(adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) \|
	223	(adjusted_mode->VDisplay << DVO_SRCDIM_VERTICAL_SHIFT));*/
	224	I915_WRITE(dvo_srcdim_reg,
	225	(adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) \|
	226	(adjusted_mode->vdisplay << DVO_SRCDIM_VERTICAL_SHIFT));
	227	/I915_WRITE(DVOB, dvo_val);/
	228	I915_WRITE(dvo_reg, dvo_val);
	229	}
	230
	231	/**
	232	* Detect the output connection on our DVO device.
	233	*
	234	* Unimplemented.
	235	*/
7b334fcb	236	static enum drm_connector_status
930a9e28	237	intel_dvo_detect(struct drm_connector *connector, bool force)
79e53945	238	{
df0e9248	239	struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
ea5b213a	240	return intel_dvo->dev.dev_ops->detect(&intel_dvo->dev);
79e53945 JB	241	}
	242
	243	static int intel_dvo_get_modes(struct drm_connector *connector)
	244	{
df0e9248	245	struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
f899fc64	246	struct drm_i915_private *dev_priv = connector->dev->dev_private;
79e53945 JB	247
	248	/* We should probably have an i2c driver get_modes function for those
	249	* devices which will have a fixed set of modes determined by the chip
	250	* (TV-out, for example), but for now with just TMDS and LVDS,
	251	* that's not the case.
	252	*/
f899fc64	253	intel_ddc_get_modes(connector,
3bd7d909	254	intel_gmbus_get_adapter(dev_priv, GMBUS_PORT_DPC));
79e53945 JB	255	if (!list_empty(&connector->probed_modes))
	256	return 1;
	257
ea5b213a	258	if (intel_dvo->panel_fixed_mode != NULL) {
79e53945	259	struct drm_display_mode *mode;
ea5b213a	260	mode = drm_mode_duplicate(connector->dev, intel_dvo->panel_fixed_mode);
79e53945 JB	261	if (mode) {
	262	drm_mode_probed_add(connector, mode);
	263	return 1;
	264	}
	265	}
ea5b213a	266
79e53945 JB	267	return 0;
	268	}
	269
ea5b213a	270	static void intel_dvo_destroy(struct drm_connector *connector)
79e53945	271	{
79e53945 JB	272	drm_sysfs_connector_remove(connector);
79e53945 JB	273	drm_connector_cleanup(connector);
599be16c	274	kfree(connector);
79e53945	275	}
79e53945 JB	276
	277	static const struct drm_encoder_helper_funcs intel_dvo_helper_funcs = {
	278	.dpms = intel_dvo_dpms,
	279	.mode_fixup = intel_dvo_mode_fixup,
	280	.prepare = intel_encoder_prepare,
	281	.mode_set = intel_dvo_mode_set,
	282	.commit = intel_encoder_commit,
	283	};
	284
	285	static const struct drm_connector_funcs intel_dvo_connector_funcs = {
c9fb15f6	286	.dpms = drm_helper_connector_dpms,
79e53945 JB	287	.detect = intel_dvo_detect,
	288	.destroy = intel_dvo_destroy,
	289	.fill_modes = drm_helper_probe_single_connector_modes,
	290	};
	291
	292	static const struct drm_connector_helper_funcs intel_dvo_connector_helper_funcs = {
	293	.mode_valid = intel_dvo_mode_valid,
	294	.get_modes = intel_dvo_get_modes,
df0e9248	295	.best_encoder = intel_best_encoder,
79e53945 JB	296	};
79e53945 JB	297
b358d0a6	298	static void intel_dvo_enc_destroy(struct drm_encoder *encoder)
79e53945	299	{
ea5b213a CW	300	struct intel_dvo *intel_dvo = enc_to_intel_dvo(encoder);
	301
	302	if (intel_dvo->dev.dev_ops->destroy)
	303	intel_dvo->dev.dev_ops->destroy(&intel_dvo->dev);
	304
	305	kfree(intel_dvo->panel_fixed_mode);
	306
	307	intel_encoder_destroy(encoder);
79e53945 JB	308	}
	309
	310	static const struct drm_encoder_funcs intel_dvo_enc_funcs = {
	311	.destroy = intel_dvo_enc_destroy,
	312	};
	313
79e53945 JB	314	/**
	315	* Attempts to get a fixed panel timing for LVDS (currently only the i830).
	316	*
	317	* Other chips with DVO LVDS will need to extend this to deal with the LVDS
	318	* chip being on DVOB/C and having multiple pipes.
	319	*/
	320	static struct drm_display_mode *
ea5b213a	321	intel_dvo_get_current_mode(struct drm_connector *connector)
79e53945 JB	322	{
	323	struct drm_device *dev = connector->dev;
	324	struct drm_i915_private *dev_priv = dev->dev_private;
df0e9248	325	struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
ea5b213a	326	uint32_t dvo_val = I915_READ(intel_dvo->dev.dvo_reg);
79e53945 JB	327	struct drm_display_mode *mode = NULL;
	328
	329	/* If the DVO port is active, that'll be the LVDS, so we can pull out
	330	* its timings to get how the BIOS set up the panel.
	331	*/
	332	if (dvo_val & DVO_ENABLE) {
	333	struct drm_crtc *crtc;
	334	int pipe = (dvo_val & DVO_PIPE_B_SELECT) ? 1 : 0;
	335
f875c15a	336	crtc = intel_get_crtc_for_pipe(dev, pipe);
79e53945 JB	337	if (crtc) {
79e53945 JB	338	mode = intel_crtc_mode_get(dev, crtc);
79e53945 JB	339	if (mode) {
	340	mode->type \|= DRM_MODE_TYPE_PREFERRED;
	341	if (dvo_val & DVO_HSYNC_ACTIVE_HIGH)
	342	mode->flags \|= DRM_MODE_FLAG_PHSYNC;
	343	if (dvo_val & DVO_VSYNC_ACTIVE_HIGH)
	344	mode->flags \|= DRM_MODE_FLAG_PVSYNC;
	345	}
	346	}
	347	}
ea5b213a	348
79e53945 JB	349	return mode;
	350	}
	351
	352	void intel_dvo_init(struct drm_device *dev)
	353	{
f899fc64	354	struct drm_i915_private *dev_priv = dev->dev_private;
21d40d37	355	struct intel_encoder *intel_encoder;
ea5b213a	356	struct intel_dvo *intel_dvo;
599be16c	357	struct intel_connector *intel_connector;
79e53945	358	int i;
79e53945	359	int encoder_type = DRM_MODE_ENCODER_NONE;
ea5b213a CW	360
	361	intel_dvo = kzalloc(sizeof(struct intel_dvo), GFP_KERNEL);
	362	if (!intel_dvo)
79e53945 JB	363	return;
79e53945 JB	364
599be16c ZW	365	intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
599be16c ZW	366	if (!intel_connector) {
ea5b213a	367	kfree(intel_dvo);
599be16c ZW	368	return;
	369	}
	370
ea5b213a	371	intel_encoder = &intel_dvo->base;
373a3cf7 CW	372	drm_encoder_init(dev, &intel_encoder->base,
373a3cf7 CW	373	&intel_dvo_enc_funcs, encoder_type);
ea5b213a	374
79e53945 JB	375	/* Now, try to find a controller */
79e53945 JB	376	for (i = 0; i < ARRAY_SIZE(intel_dvo_devices); i++) {
599be16c	377	struct drm_connector *connector = &intel_connector->base;
ea5b213a	378	const struct intel_dvo_device *dvo = &intel_dvo_devices[i];
f899fc64	379	struct i2c_adapter *i2c;
79e53945 JB	380	int gpio;
79e53945 JB	381
79e53945 JB	382	/* Allow the I2C driver info to specify the GPIO to be used in
	383	* special cases, but otherwise default to what's defined
	384	* in the spec.
	385	*/
3bd7d909	386	if (intel_gmbus_is_port_valid(dvo->gpio))
79e53945 JB	387	gpio = dvo->gpio;
79e53945 JB	388	else if (dvo->type == INTEL_DVO_CHIP_LVDS)
f573c660	389	gpio = GMBUS_PORT_SSC;
79e53945	390	else
a6b17b43	391	gpio = GMBUS_PORT_DPB;
79e53945 JB	392
	393	/* Set up the I2C bus necessary for the chip we're probing.
	394	* It appears that everything is on GPIOE except for panels
	395	* on i830 laptops, which are on GPIOB (DVOA).
	396	*/
3bd7d909	397	i2c = intel_gmbus_get_adapter(dev_priv, gpio);
79e53945	398
ea5b213a	399	intel_dvo->dev = *dvo;
f573c660	400	if (!dvo->dev_ops->init(&intel_dvo->dev, i2c))
79e53945 JB	401	continue;
79e53945 JB	402
21d40d37 EA	403	intel_encoder->type = INTEL_OUTPUT_DVO;
21d40d37 EA	404	intel_encoder->crtc_mask = (1 << 0) \| (1 << 1);
79e53945 JB	405	switch (dvo->type) {
79e53945 JB	406	case INTEL_DVO_CHIP_TMDS:
66a9278e	407	intel_encoder->cloneable = true;
79e53945 JB	408	drm_connector_init(dev, connector,
	409	&intel_dvo_connector_funcs,
	410	DRM_MODE_CONNECTOR_DVII);
	411	encoder_type = DRM_MODE_ENCODER_TMDS;
	412	break;
	413	case INTEL_DVO_CHIP_LVDS:
66a9278e	414	intel_encoder->cloneable = false;
79e53945 JB	415	drm_connector_init(dev, connector,
	416	&intel_dvo_connector_funcs,
	417	DRM_MODE_CONNECTOR_LVDS);
	418	encoder_type = DRM_MODE_ENCODER_LVDS;
	419	break;
	420	}
	421
	422	drm_connector_helper_add(connector,
	423	&intel_dvo_connector_helper_funcs);
	424	connector->display_info.subpixel_order = SubPixelHorizontalRGB;
	425	connector->interlace_allowed = false;
	426	connector->doublescan_allowed = false;
	427
4ef69c7a	428	drm_encoder_helper_add(&intel_encoder->base,
79e53945 JB	429	&intel_dvo_helper_funcs);
79e53945 JB	430
df0e9248	431	intel_connector_attach_encoder(intel_connector, intel_encoder);
79e53945 JB	432	if (dvo->type == INTEL_DVO_CHIP_LVDS) {
	433	/* For our LVDS chipsets, we should hopefully be able
	434	* to dig the fixed panel mode out of the BIOS data.
	435	* However, it's in a different format from the BIOS
	436	* data on chipsets with integrated LVDS (stored in AIM
	437	* headers, likely), so for now, just get the current
	438	* mode being output through DVO.
	439	*/
ea5b213a	440	intel_dvo->panel_fixed_mode =
79e53945	441	intel_dvo_get_current_mode(connector);
ea5b213a	442	intel_dvo->panel_wants_dither = true;
79e53945 JB	443	}
	444
	445	drm_sysfs_connector_add(connector);
	446	return;
	447	}
	448
373a3cf7	449	drm_encoder_cleanup(&intel_encoder->base);
ea5b213a	450	kfree(intel_dvo);
599be16c	451	kfree(intel_connector);
79e53945	452	}