[mirror_ubuntu-focal-kernel.git] / drivers / video / fbdev / omap2 / omapfb / dss / display.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * linux/drivers/video/omap2/dss/display.c
 *
 * Copyright (C) 2009 Nokia Corporation
 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
 *
 * Some code and ideas taken from drivers/video/omap/ driver
 * by Imre Deak.
 */

#define DSS_SUBSYS_NAME "DISPLAY"

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/jiffies.h>
#include <linux/platform_device.h>
#include <linux/of.h>

#include <video/omapfb_dss.h>
#include "dss.h"
#include "dss_features.h"

void omapdss_default_get_resolution(struct omap_dss_device *dssdev,
			u16 *xres, u16 *yres)
{
	*xres = dssdev->panel.timings.x_res;
	*yres = dssdev->panel.timings.y_res;
}
EXPORT_SYMBOL(omapdss_default_get_resolution);

int omapdss_default_get_recommended_bpp(struct omap_dss_device *dssdev)
{
	switch (dssdev->type) {
	case OMAP_DISPLAY_TYPE_DPI:
		if (dssdev->phy.dpi.data_lines == 24)
			return 24;
		else
			return 16;

	case OMAP_DISPLAY_TYPE_DBI:
		if (dssdev->ctrl.pixel_size == 24)
			return 24;
		else
			return 16;
	case OMAP_DISPLAY_TYPE_DSI:
		if (dsi_get_pixel_size(dssdev->panel.dsi_pix_fmt) > 16)
			return 24;
		else
			return 16;
	case OMAP_DISPLAY_TYPE_VENC:
	case OMAP_DISPLAY_TYPE_SDI:
	case OMAP_DISPLAY_TYPE_HDMI:
	case OMAP_DISPLAY_TYPE_DVI:
		return 24;
	default:
		BUG();
		return 0;
	}
}
EXPORT_SYMBOL(omapdss_default_get_recommended_bpp);

void omapdss_default_get_timings(struct omap_dss_device *dssdev,
		struct omap_video_timings *timings)
{
	*timings = dssdev->panel.timings;
}
EXPORT_SYMBOL(omapdss_default_get_timings);

int dss_suspend_all_devices(void)
{
	struct omap_dss_device *dssdev = NULL;

	for_each_dss_dev(dssdev) {
		if (!dssdev->driver)
			continue;

		if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) {
			dssdev->driver->disable(dssdev);
			dssdev->activate_after_resume = true;
		} else {
			dssdev->activate_after_resume = false;
		}
	}

	return 0;
}

int dss_resume_all_devices(void)
{
	struct omap_dss_device *dssdev = NULL;

	for_each_dss_dev(dssdev) {
		if (!dssdev->driver)
			continue;

		if (dssdev->activate_after_resume) {
			dssdev->driver->enable(dssdev);
			dssdev->activate_after_resume = false;
		}
	}

	return 0;
}

void dss_disable_all_devices(void)
{
	struct omap_dss_device *dssdev = NULL;

	for_each_dss_dev(dssdev) {
		if (!dssdev->driver)
			continue;

		if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
			dssdev->driver->disable(dssdev);
	}
}

static LIST_HEAD(panel_list);
static DEFINE_MUTEX(panel_list_mutex);
static int disp_num_counter;

int omapdss_register_display(struct omap_dss_device *dssdev)
{
	struct omap_dss_driver *drv = dssdev->driver;
	int id;

	/*
	 * Note: this presumes all the displays are either using DT or non-DT,
	 * which normally should be the case. This also presumes that all
	 * displays either have an DT alias, or none has.
	 */

	if (dssdev->dev->of_node) {
		id = of_alias_get_id(dssdev->dev->of_node, "display");

		if (id < 0)
			id = disp_num_counter++;
	} else {
		id = disp_num_counter++;
	}

	snprintf(dssdev->alias, sizeof(dssdev->alias), "display%d", id);

	/* Use 'label' property for name, if it exists */
	if (dssdev->dev->of_node)
		of_property_read_string(dssdev->dev->of_node, "label",
			&dssdev->name);

	if (dssdev->name == NULL)
		dssdev->name = dssdev->alias;

	if (drv && drv->get_resolution == NULL)
		drv->get_resolution = omapdss_default_get_resolution;
	if (drv && drv->get_recommended_bpp == NULL)
		drv->get_recommended_bpp = omapdss_default_get_recommended_bpp;
	if (drv && drv->get_timings == NULL)
		drv->get_timings = omapdss_default_get_timings;

	mutex_lock(&panel_list_mutex);
	list_add_tail(&dssdev->panel_list, &panel_list);
	mutex_unlock(&panel_list_mutex);
	return 0;
}
EXPORT_SYMBOL(omapdss_register_display);

void omapdss_unregister_display(struct omap_dss_device *dssdev)
{
	mutex_lock(&panel_list_mutex);
	list_del(&dssdev->panel_list);
	mutex_unlock(&panel_list_mutex);
}
EXPORT_SYMBOL(omapdss_unregister_display);

struct omap_dss_device *omap_dss_get_device(struct omap_dss_device *dssdev)
{
	if (!try_module_get(dssdev->owner))
		return NULL;

	if (get_device(dssdev->dev) == NULL) {
		module_put(dssdev->owner);
		return NULL;
	}

	return dssdev;
}
EXPORT_SYMBOL(omap_dss_get_device);

void omap_dss_put_device(struct omap_dss_device *dssdev)
{
	put_device(dssdev->dev);
	module_put(dssdev->owner);
}
EXPORT_SYMBOL(omap_dss_put_device);

/*
 * ref count of the found device is incremented.
 * ref count of from-device is decremented.
 */
struct omap_dss_device *omap_dss_get_next_device(struct omap_dss_device *from)
{
	struct list_head *l;
	struct omap_dss_device *dssdev;

	mutex_lock(&panel_list_mutex);

	if (list_empty(&panel_list)) {
		dssdev = NULL;
		goto out;
	}

	if (from == NULL) {
		dssdev = list_first_entry(&panel_list, struct omap_dss_device,
				panel_list);
		omap_dss_get_device(dssdev);
		goto out;
	}

	omap_dss_put_device(from);

	list_for_each(l, &panel_list) {
		dssdev = list_entry(l, struct omap_dss_device, panel_list);
		if (dssdev == from) {
			if (list_is_last(l, &panel_list)) {
				dssdev = NULL;
				goto out;
			}

			dssdev = list_entry(l->next, struct omap_dss_device,
					panel_list);
			omap_dss_get_device(dssdev);
			goto out;
		}
	}

	WARN(1, "'from' dssdev not found\n");

	dssdev = NULL;
out:
	mutex_unlock(&panel_list_mutex);
	return dssdev;
}
EXPORT_SYMBOL(omap_dss_get_next_device);

struct omap_dss_device *omap_dss_find_device(void *data,
		int (*match)(struct omap_dss_device *dssdev, void *data))
{
	struct omap_dss_device *dssdev = NULL;

	while ((dssdev = omap_dss_get_next_device(dssdev)) != NULL) {
		if (match(dssdev, data))
			return dssdev;
	}

	return NULL;
}
EXPORT_SYMBOL(omap_dss_find_device);

void videomode_to_omap_video_timings(const struct videomode *vm,
		struct omap_video_timings *ovt)
{
	memset(ovt, 0, sizeof(*ovt));

	ovt->pixelclock = vm->pixelclock;
	ovt->x_res = vm->hactive;
	ovt->hbp = vm->hback_porch;
	ovt->hfp = vm->hfront_porch;
	ovt->hsw = vm->hsync_len;
	ovt->y_res = vm->vactive;
	ovt->vbp = vm->vback_porch;
	ovt->vfp = vm->vfront_porch;
	ovt->vsw = vm->vsync_len;

	ovt->vsync_level = vm->flags & DISPLAY_FLAGS_VSYNC_HIGH ?
		OMAPDSS_SIG_ACTIVE_HIGH :
		OMAPDSS_SIG_ACTIVE_LOW;
	ovt->hsync_level = vm->flags & DISPLAY_FLAGS_HSYNC_HIGH ?
		OMAPDSS_SIG_ACTIVE_HIGH :
		OMAPDSS_SIG_ACTIVE_LOW;
	ovt->de_level = vm->flags & DISPLAY_FLAGS_DE_HIGH ?
		OMAPDSS_SIG_ACTIVE_HIGH :
		OMAPDSS_SIG_ACTIVE_LOW;
	ovt->data_pclk_edge = vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE ?
		OMAPDSS_DRIVE_SIG_RISING_EDGE :
		OMAPDSS_DRIVE_SIG_FALLING_EDGE;

	ovt->sync_pclk_edge = ovt->data_pclk_edge;
}
EXPORT_SYMBOL(videomode_to_omap_video_timings);

void omap_video_timings_to_videomode(const struct omap_video_timings *ovt,
		struct videomode *vm)
{
	memset(vm, 0, sizeof(*vm));

	vm->pixelclock = ovt->pixelclock;

	vm->hactive = ovt->x_res;
	vm->hback_porch = ovt->hbp;
	vm->hfront_porch = ovt->hfp;
	vm->hsync_len = ovt->hsw;
	vm->vactive = ovt->y_res;
	vm->vback_porch = ovt->vbp;
	vm->vfront_porch = ovt->vfp;
	vm->vsync_len = ovt->vsw;

	if (ovt->hsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
		vm->flags |= DISPLAY_FLAGS_HSYNC_HIGH;
	else
		vm->flags |= DISPLAY_FLAGS_HSYNC_LOW;

	if (ovt->vsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
		vm->flags |= DISPLAY_FLAGS_VSYNC_HIGH;
	else
		vm->flags |= DISPLAY_FLAGS_VSYNC_LOW;

	if (ovt->de_level == OMAPDSS_SIG_ACTIVE_HIGH)
		vm->flags |= DISPLAY_FLAGS_DE_HIGH;
	else
		vm->flags |= DISPLAY_FLAGS_DE_LOW;

	if (ovt->data_pclk_edge == OMAPDSS_DRIVE_SIG_RISING_EDGE)
		vm->flags |= DISPLAY_FLAGS_PIXDATA_POSEDGE;
	else
		vm->flags |= DISPLAY_FLAGS_PIXDATA_NEGEDGE;
}
EXPORT_SYMBOL(omap_video_timings_to_videomode);
Commit	Line	Data
caab277b	1	// SPDX-License-Identifier: GPL-2.0-only
f76ee892 TV	2	/*
	3	* linux/drivers/video/omap2/dss/display.c
	4	*
	5	* Copyright (C) 2009 Nokia Corporation
	6	* Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
	7	*
	8	* Some code and ideas taken from drivers/video/omap/ driver
	9	* by Imre Deak.
f76ee892 TV	10	*/
	11
	12	#define DSS_SUBSYS_NAME "DISPLAY"
	13
	14	#include <linux/kernel.h>
	15	#include <linux/module.h>
	16	#include <linux/jiffies.h>
	17	#include <linux/platform_device.h>
	18	#include <linux/of.h>
	19
62d9e44e	20	#include <video/omapfb_dss.h>
f76ee892 TV	21	#include "dss.h"
	22	#include "dss_features.h"
	23
	24	void omapdss_default_get_resolution(struct omap_dss_device *dssdev,
	25	u16 xres, u16 yres)
	26	{
	27	*xres = dssdev->panel.timings.x_res;
	28	*yres = dssdev->panel.timings.y_res;
	29	}
	30	EXPORT_SYMBOL(omapdss_default_get_resolution);
	31
	32	int omapdss_default_get_recommended_bpp(struct omap_dss_device *dssdev)
	33	{
	34	switch (dssdev->type) {
	35	case OMAP_DISPLAY_TYPE_DPI:
	36	if (dssdev->phy.dpi.data_lines == 24)
	37	return 24;
	38	else
	39	return 16;
	40
	41	case OMAP_DISPLAY_TYPE_DBI:
	42	if (dssdev->ctrl.pixel_size == 24)
	43	return 24;
	44	else
	45	return 16;
	46	case OMAP_DISPLAY_TYPE_DSI:
	47	if (dsi_get_pixel_size(dssdev->panel.dsi_pix_fmt) > 16)
	48	return 24;
	49	else
	50	return 16;
	51	case OMAP_DISPLAY_TYPE_VENC:
	52	case OMAP_DISPLAY_TYPE_SDI:
	53	case OMAP_DISPLAY_TYPE_HDMI:
	54	case OMAP_DISPLAY_TYPE_DVI:
	55	return 24;
	56	default:
	57	BUG();
	58	return 0;
	59	}
	60	}
	61	EXPORT_SYMBOL(omapdss_default_get_recommended_bpp);
	62
	63	void omapdss_default_get_timings(struct omap_dss_device *dssdev,
	64	struct omap_video_timings *timings)
	65	{
	66	*timings = dssdev->panel.timings;
	67	}
	68	EXPORT_SYMBOL(omapdss_default_get_timings);
	69
	70	int dss_suspend_all_devices(void)
	71	{
	72	struct omap_dss_device *dssdev = NULL;
	73
	74	for_each_dss_dev(dssdev) {
	75	if (!dssdev->driver)
	76	continue;
	77
	78	if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) {
	79	dssdev->driver->disable(dssdev);
	80	dssdev->activate_after_resume = true;
	81	} else {
	82	dssdev->activate_after_resume = false;
	83	}
	84	}
85
86	return 0;
87	}
88
89	int dss_resume_all_devices(void)
90	{
91	struct omap_dss_device *dssdev = NULL;
92
93	for_each_dss_dev(dssdev) {
94	if (!dssdev->driver)
95	continue;
96
97	if (dssdev->activate_after_resume) {
98	dssdev->driver->enable(dssdev);
99	dssdev->activate_after_resume = false;
100	}
101	}
102
103	return 0;
104	}
105
106	void dss_disable_all_devices(void)
107	{
108	struct omap_dss_device *dssdev = NULL;
109
110	for_each_dss_dev(dssdev) {
111	if (!dssdev->driver)
112	continue;
113
114	if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
115	dssdev->driver->disable(dssdev);
116	}
117	}
118
119	static LIST_HEAD(panel_list);
120	static DEFINE_MUTEX(panel_list_mutex);
121	static int disp_num_counter;
122
123	int omapdss_register_display(struct omap_dss_device *dssdev)
124	{
125	struct omap_dss_driver *drv = dssdev->driver;
126	int id;
127
128	/*
129	* Note: this presumes all the displays are either using DT or non-DT,
130	* which normally should be the case. This also presumes that all
131	* displays either have an DT alias, or none has.
132	*/
133
134	if (dssdev->dev->of_node) {
135	id = of_alias_get_id(dssdev->dev->of_node, "display");
136
137	if (id < 0)
138	id = disp_num_counter++;
139	} else {
140	id = disp_num_counter++;
141	}
142
143	snprintf(dssdev->alias, sizeof(dssdev->alias), "display%d", id);
144
145	/* Use 'label' property for name, if it exists */
146	if (dssdev->dev->of_node)
147	of_property_read_string(dssdev->dev->of_node, "label",
148	&dssdev->name);
149
150	if (dssdev->name == NULL)
151	dssdev->name = dssdev->alias;
152
153	if (drv && drv->get_resolution == NULL)
154	drv->get_resolution = omapdss_default_get_resolution;
155	if (drv && drv->get_recommended_bpp == NULL)
156	drv->get_recommended_bpp = omapdss_default_get_recommended_bpp;
157	if (drv && drv->get_timings == NULL)
158	drv->get_timings = omapdss_default_get_timings;
159
160	mutex_lock(&panel_list_mutex);
161	list_add_tail(&dssdev->panel_list, &panel_list);
162	mutex_unlock(&panel_list_mutex);
163	return 0;
164	}
165	EXPORT_SYMBOL(omapdss_register_display);
166
167	void omapdss_unregister_display(struct omap_dss_device *dssdev)
168	{
169	mutex_lock(&panel_list_mutex);
170	list_del(&dssdev->panel_list);
171	mutex_unlock(&panel_list_mutex);
172	}
173	EXPORT_SYMBOL(omapdss_unregister_display);
174
175	struct omap_dss_device omap_dss_get_device(struct omap_dss_device dssdev)
176	{
177	if (!try_module_get(dssdev->owner))
178	return NULL;
179
180	if (get_device(dssdev->dev) == NULL) {
181	module_put(dssdev->owner);
182	return NULL;
183	}
184
185	return dssdev;
186	}
187	EXPORT_SYMBOL(omap_dss_get_device);
188
189	void omap_dss_put_device(struct omap_dss_device *dssdev)
190	{
191	put_device(dssdev->dev);
192	module_put(dssdev->owner);
193	}
194	EXPORT_SYMBOL(omap_dss_put_device);
195
196	/*
197	* ref count of the found device is incremented.
198	* ref count of from-device is decremented.
199	*/
200	struct omap_dss_device omap_dss_get_next_device(struct omap_dss_device from)
201	{
202	struct list_head *l;
203	struct omap_dss_device *dssdev;
204
205	mutex_lock(&panel_list_mutex);
206
207	if (list_empty(&panel_list)) {
208	dssdev = NULL;
209	goto out;
210	}
211
212	if (from == NULL) {
213	dssdev = list_first_entry(&panel_list, struct omap_dss_device,
214	panel_list);
215	omap_dss_get_device(dssdev);
216	goto out;
217	}
218
219	omap_dss_put_device(from);
220
221	list_for_each(l, &panel_list) {
222	dssdev = list_entry(l, struct omap_dss_device, panel_list);
223	if (dssdev == from) {
224	if (list_is_last(l, &panel_list)) {
225	dssdev = NULL;
226	goto out;
227	}
228
229	dssdev = list_entry(l->next, struct omap_dss_device,
230	panel_list);
231	omap_dss_get_device(dssdev);
232	goto out;
233	}
234	}
235
236	WARN(1, "'from' dssdev not found\n");
237
238	dssdev = NULL;
239	out:
240	mutex_unlock(&panel_list_mutex);
241	return dssdev;
242	}
243	EXPORT_SYMBOL(omap_dss_get_next_device);
244
245	struct omap_dss_device omap_dss_find_device(void data,
246	int (match)(struct omap_dss_device dssdev, void *data))
247	{
248	struct omap_dss_device *dssdev = NULL;
249
250	while ((dssdev = omap_dss_get_next_device(dssdev)) != NULL) {
251	if (match(dssdev, data))
252	return dssdev;
253	}
254
255	return NULL;
256	}
257	EXPORT_SYMBOL(omap_dss_find_device);
258
259	void videomode_to_omap_video_timings(const struct videomode *vm,
260	struct omap_video_timings *ovt)
261	{
262	memset(ovt, 0, sizeof(*ovt));
263
264	ovt->pixelclock = vm->pixelclock;
265	ovt->x_res = vm->hactive;
266	ovt->hbp = vm->hback_porch;
267	ovt->hfp = vm->hfront_porch;
268	ovt->hsw = vm->hsync_len;
269	ovt->y_res = vm->vactive;
270	ovt->vbp = vm->vback_porch;
271	ovt->vfp = vm->vfront_porch;
272	ovt->vsw = vm->vsync_len;
273
274	ovt->vsync_level = vm->flags & DISPLAY_FLAGS_VSYNC_HIGH ?
275	OMAPDSS_SIG_ACTIVE_HIGH :
276	OMAPDSS_SIG_ACTIVE_LOW;
277	ovt->hsync_level = vm->flags & DISPLAY_FLAGS_HSYNC_HIGH ?
278	OMAPDSS_SIG_ACTIVE_HIGH :
279	OMAPDSS_SIG_ACTIVE_LOW;
280	ovt->de_level = vm->flags & DISPLAY_FLAGS_DE_HIGH ?
281	OMAPDSS_SIG_ACTIVE_HIGH :
282	OMAPDSS_SIG_ACTIVE_LOW;
283	ovt->data_pclk_edge = vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE ?
284	OMAPDSS_DRIVE_SIG_RISING_EDGE :
285	OMAPDSS_DRIVE_SIG_FALLING_EDGE;
286
287	ovt->sync_pclk_edge = ovt->data_pclk_edge;
288	}
289	EXPORT_SYMBOL(videomode_to_omap_video_timings);
290
291	void omap_video_timings_to_videomode(const struct omap_video_timings *ovt,
292	struct videomode *vm)
293	{
294	memset(vm, 0, sizeof(*vm));
295
296	vm->pixelclock = ovt->pixelclock;
297
298	vm->hactive = ovt->x_res;
299	vm->hback_porch = ovt->hbp;
300	vm->hfront_porch = ovt->hfp;
301	vm->hsync_len = ovt->hsw;
302	vm->vactive = ovt->y_res;
303	vm->vback_porch = ovt->vbp;
304	vm->vfront_porch = ovt->vfp;
305	vm->vsync_len = ovt->vsw;
306
307	if (ovt->hsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
308	vm->flags \|= DISPLAY_FLAGS_HSYNC_HIGH;
309	else
310	vm->flags \|= DISPLAY_FLAGS_HSYNC_LOW;
311
312	if (ovt->vsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
313	vm->flags \|= DISPLAY_FLAGS_VSYNC_HIGH;
314	else
315	vm->flags \|= DISPLAY_FLAGS_VSYNC_LOW;
316
317	if (ovt->de_level == OMAPDSS_SIG_ACTIVE_HIGH)
318	vm->flags \|= DISPLAY_FLAGS_DE_HIGH;
319	else
320	vm->flags \|= DISPLAY_FLAGS_DE_LOW;
321
322	if (ovt->data_pclk_edge == OMAPDSS_DRIVE_SIG_RISING_EDGE)
323	vm->flags \|= DISPLAY_FLAGS_PIXDATA_POSEDGE;
324	else
325	vm->flags \|= DISPLAY_FLAGS_PIXDATA_NEGEDGE;
326	}
327	EXPORT_SYMBOL(omap_video_timings_to_videomode);