drivers/gpu/drm/imx/parallel-display.c - kernel/msm-4.19 - Gitiles

 /*
  * i.MX drm driver - parallel display implementation
  *
  * Copyright (C) 2012 Sascha Hauer, Pengutronix
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
  * as published by the Free Software Foundation; either version 2
  * of the License, or (at your option) any later version.
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  */

 #include <linux/component.h>
 #include <linux/module.h>
 #include <drm/drmP.h>
 #include <drm/drm_fb_helper.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_panel.h>
 #include <linux/videodev2.h>
 #include <video/of_display_timing.h>
 #include <linux/of_graph.h>

 #include "imx-drm.h"

 #define con_to_imxpd(x) container_of(x, struct imx_parallel_display, connector)
 #define enc_to_imxpd(x) container_of(x, struct imx_parallel_display, encoder)

 struct imx_parallel_display {
 	struct drm_connector connector;
 	struct drm_encoder encoder;
 	struct device *dev;
 	void *edid;
 	int edid_len;
 	u32 bus_format;
 	int mode_valid;
 	struct drm_display_mode mode;
 	struct drm_panel *panel;
 };

 static enum drm_connector_status imx_pd_connector_detect(
 		struct drm_connector *connector, bool force)
 {
 	return connector_status_connected;
 }

 static int imx_pd_connector_get_modes(struct drm_connector *connector)
 {
 	struct imx_parallel_display *imxpd = con_to_imxpd(connector);
 	struct device_node *np = imxpd->dev->of_node;
 	int num_modes = 0;

 	if (imxpd->panel && imxpd->panel->funcs &&
 	    imxpd->panel->funcs->get_modes) {
 		num_modes = imxpd->panel->funcs->get_modes(imxpd->panel);
 		if (num_modes > 0)
 			return num_modes;
 	}

 	if (imxpd->edid) {
 		drm_mode_connector_update_edid_property(connector, imxpd->edid);
 		num_modes = drm_add_edid_modes(connector, imxpd->edid);
 	}

 	if (imxpd->mode_valid) {
 		struct drm_display_mode *mode = drm_mode_create(connector->dev);

 		if (!mode)
 			return -EINVAL;
 		drm_mode_copy(mode, &imxpd->mode);
 		mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
 		drm_mode_probed_add(connector, mode);
 		num_modes++;
 	}

 	if (np) {
 		struct drm_display_mode *mode = drm_mode_create(connector->dev);

 		if (!mode)
 			return -EINVAL;
 		of_get_drm_display_mode(np, &imxpd->mode, OF_USE_NATIVE_MODE);
 		drm_mode_copy(mode, &imxpd->mode);
 		mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
 		drm_mode_probed_add(connector, mode);
 		num_modes++;
 	}

 	return num_modes;
 }

 static struct drm_encoder *imx_pd_connector_best_encoder(
 		struct drm_connector *connector)
 {
 	struct imx_parallel_display *imxpd = con_to_imxpd(connector);

 	return &imxpd->encoder;
 }

 static void imx_pd_encoder_dpms(struct drm_encoder *encoder, int mode)
 {
 	struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);

 	if (mode != DRM_MODE_DPMS_ON)
 		drm_panel_disable(imxpd->panel);
 	else
 		drm_panel_enable(imxpd->panel);
 }

 static bool imx_pd_encoder_mode_fixup(struct drm_encoder *encoder,
 			   const struct drm_display_mode *mode,
 			   struct drm_display_mode *adjusted_mode)
 {
 	return true;
 }

 static void imx_pd_encoder_prepare(struct drm_encoder *encoder)
 {
 	struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);

 	imx_drm_set_bus_format(encoder, imxpd->bus_format);
 }

 static void imx_pd_encoder_commit(struct drm_encoder *encoder)
 {
 	struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);

 	drm_panel_prepare(imxpd->panel);
 	drm_panel_enable(imxpd->panel);
 }

 static void imx_pd_encoder_mode_set(struct drm_encoder *encoder,
 			 struct drm_display_mode *orig_mode,
 			 struct drm_display_mode *mode)
 {
 }

 static void imx_pd_encoder_disable(struct drm_encoder *encoder)
 {
 	struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);

 	drm_panel_disable(imxpd->panel);
 	drm_panel_unprepare(imxpd->panel);
 }

 static struct drm_connector_funcs imx_pd_connector_funcs = {
 	.dpms = drm_helper_connector_dpms,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.detect = imx_pd_connector_detect,
 	.destroy = imx_drm_connector_destroy,
 };

 static struct drm_connector_helper_funcs imx_pd_connector_helper_funcs = {
 	.get_modes = imx_pd_connector_get_modes,
 	.best_encoder = imx_pd_connector_best_encoder,
 };

 static struct drm_encoder_funcs imx_pd_encoder_funcs = {
 	.destroy = imx_drm_encoder_destroy,
 };

 static struct drm_encoder_helper_funcs imx_pd_encoder_helper_funcs = {
 	.dpms = imx_pd_encoder_dpms,
 	.mode_fixup = imx_pd_encoder_mode_fixup,
 	.prepare = imx_pd_encoder_prepare,
 	.commit = imx_pd_encoder_commit,
 	.mode_set = imx_pd_encoder_mode_set,
 	.disable = imx_pd_encoder_disable,
 };

 static int imx_pd_register(struct drm_device *drm,
 	struct imx_parallel_display *imxpd)
 {
 	int ret;

 	ret = imx_drm_encoder_parse_of(drm, &imxpd->encoder,
 				       imxpd->dev->of_node);
 	if (ret)
 		return ret;

 	/* set the connector's dpms to OFF so that
 	 * drm_helper_connector_dpms() won't return
 	 * immediately since the current state is ON
 	 * at this point.
 	 */
 	imxpd->connector.dpms = DRM_MODE_DPMS_OFF;

 	drm_encoder_helper_add(&imxpd->encoder, &imx_pd_encoder_helper_funcs);
 	drm_encoder_init(drm, &imxpd->encoder, &imx_pd_encoder_funcs,
 			 DRM_MODE_ENCODER_NONE);

 	drm_connector_helper_add(&imxpd->connector,
 			&imx_pd_connector_helper_funcs);
 	drm_connector_init(drm, &imxpd->connector, &imx_pd_connector_funcs,
 			   DRM_MODE_CONNECTOR_VGA);

 	if (imxpd->panel)
 		drm_panel_attach(imxpd->panel, &imxpd->connector);

 	drm_mode_connector_attach_encoder(&imxpd->connector, &imxpd->encoder);

 	imxpd->connector.encoder = &imxpd->encoder;

 	return 0;
 }

 static int imx_pd_bind(struct device *dev, struct device *master, void *data)
 {
 	struct drm_device *drm = data;
 	struct device_node *np = dev->of_node;
 	struct device_node *port;
 	const u8 *edidp;
 	struct imx_parallel_display *imxpd;
 	int ret;
 	const char *fmt;

 	imxpd = devm_kzalloc(dev, sizeof(*imxpd), GFP_KERNEL);
 	if (!imxpd)
 		return -ENOMEM;

 	edidp = of_get_property(np, "edid", &imxpd->edid_len);
 	if (edidp)
 		imxpd->edid = kmemdup(edidp, imxpd->edid_len, GFP_KERNEL);

 	ret = of_property_read_string(np, "interface-pix-fmt", &fmt);
 	if (!ret) {
 		if (!strcmp(fmt, "rgb24"))
 			imxpd->bus_format = MEDIA_BUS_FMT_RGB888_1X24;
 		else if (!strcmp(fmt, "rgb565"))
 			imxpd->bus_format = MEDIA_BUS_FMT_RGB565_1X16;
 		else if (!strcmp(fmt, "bgr666"))
 			imxpd->bus_format = MEDIA_BUS_FMT_RGB666_1X18;
 		else if (!strcmp(fmt, "lvds666"))
 			imxpd->bus_format = MEDIA_BUS_FMT_RGB666_1X24_CPADHI;
 	}

 	/* port@1 is the output port */
 	port = of_graph_get_port_by_id(np, 1);
 	if (port) {
 		struct device_node *endpoint, *remote;

 		endpoint = of_get_child_by_name(port, "endpoint");
 		if (endpoint) {
 			remote = of_graph_get_remote_port_parent(endpoint);
 			if (remote)
 				imxpd->panel = of_drm_find_panel(remote);
 			if (!imxpd->panel)
 				return -EPROBE_DEFER;
 		}
 	}

 	imxpd->dev = dev;

 	ret = imx_pd_register(drm, imxpd);
 	if (ret)
 		return ret;

 	dev_set_drvdata(dev, imxpd);

 	return 0;
 }

 static void imx_pd_unbind(struct device *dev, struct device *master,
 	void *data)
 {
 	struct imx_parallel_display *imxpd = dev_get_drvdata(dev);

 	imxpd->encoder.funcs->destroy(&imxpd->encoder);
 	imxpd->connector.funcs->destroy(&imxpd->connector);

 	kfree(imxpd->edid);
 }

 static const struct component_ops imx_pd_ops = {
 	.bind	= imx_pd_bind,
 	.unbind	= imx_pd_unbind,
 };

 static int imx_pd_probe(struct platform_device *pdev)
 {
 	return component_add(&pdev->dev, &imx_pd_ops);
 }

 static int imx_pd_remove(struct platform_device *pdev)
 {
 	component_del(&pdev->dev, &imx_pd_ops);

 	return 0;
 }

 static const struct of_device_id imx_pd_dt_ids[] = {
 	{ .compatible = "fsl,imx-parallel-display", },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, imx_pd_dt_ids);

 static struct platform_driver imx_pd_driver = {
 	.probe		= imx_pd_probe,
 	.remove		= imx_pd_remove,
 	.driver		= {
 		.of_match_table = imx_pd_dt_ids,
 		.name	= "imx-parallel-display",
 	},
 };

 module_platform_driver(imx_pd_driver);

 MODULE_DESCRIPTION("i.MX parallel display driver");
 MODULE_AUTHOR("Sascha Hauer, Pengutronix");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:imx-parallel-display");
	/*
	* i.MX drm driver - parallel display implementation
	*
	* Copyright (C) 2012 Sascha Hauer, Pengutronix
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License
	* as published by the Free Software Foundation; either version 2
	* of the License, or (at your option) any later version.
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*/

	#include <linux/component.h>
	#include <linux/module.h>
	#include <drm/drmP.h>
	#include <drm/drm_fb_helper.h>
	#include <drm/drm_crtc_helper.h>
	#include <drm/drm_panel.h>
	#include <linux/videodev2.h>
	#include <video/of_display_timing.h>
	#include <linux/of_graph.h>

	#include "imx-drm.h"

	#define con_to_imxpd(x) container_of(x, struct imx_parallel_display, connector)
	#define enc_to_imxpd(x) container_of(x, struct imx_parallel_display, encoder)

	struct imx_parallel_display {
	struct drm_connector connector;
	struct drm_encoder encoder;
	struct device *dev;
	void *edid;
	int edid_len;
	u32 bus_format;
	int mode_valid;
	struct drm_display_mode mode;
	struct drm_panel *panel;
	};

	static enum drm_connector_status imx_pd_connector_detect(
	struct drm_connector *connector, bool force)
	{
	return connector_status_connected;
	}

	static int imx_pd_connector_get_modes(struct drm_connector *connector)
	{
	struct imx_parallel_display *imxpd = con_to_imxpd(connector);
	struct device_node *np = imxpd->dev->of_node;
	int num_modes = 0;

	if (imxpd->panel && imxpd->panel->funcs &&
	imxpd->panel->funcs->get_modes) {
	num_modes = imxpd->panel->funcs->get_modes(imxpd->panel);
	if (num_modes > 0)
	return num_modes;
	}

	if (imxpd->edid) {
	drm_mode_connector_update_edid_property(connector, imxpd->edid);
	num_modes = drm_add_edid_modes(connector, imxpd->edid);
	}

	if (imxpd->mode_valid) {
	struct drm_display_mode *mode = drm_mode_create(connector->dev);

	if (!mode)
	return -EINVAL;
	drm_mode_copy(mode, &imxpd->mode);
	mode->type \|= DRM_MODE_TYPE_DRIVER \| DRM_MODE_TYPE_PREFERRED,
	drm_mode_probed_add(connector, mode);
	num_modes++;
	}

	if (np) {
	struct drm_display_mode *mode = drm_mode_create(connector->dev);

	if (!mode)
	return -EINVAL;
	of_get_drm_display_mode(np, &imxpd->mode, OF_USE_NATIVE_MODE);
	drm_mode_copy(mode, &imxpd->mode);
	mode->type \|= DRM_MODE_TYPE_DRIVER \| DRM_MODE_TYPE_PREFERRED,
	drm_mode_probed_add(connector, mode);
	num_modes++;
	}

	return num_modes;
	}

	static struct drm_encoder *imx_pd_connector_best_encoder(
	struct drm_connector *connector)
	{
	struct imx_parallel_display *imxpd = con_to_imxpd(connector);

	return &imxpd->encoder;
	}

	static void imx_pd_encoder_dpms(struct drm_encoder *encoder, int mode)
	{
	struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);

	if (mode != DRM_MODE_DPMS_ON)
	drm_panel_disable(imxpd->panel);
	else
	drm_panel_enable(imxpd->panel);
	}

	static bool imx_pd_encoder_mode_fixup(struct drm_encoder *encoder,
	const struct drm_display_mode *mode,
	struct drm_display_mode *adjusted_mode)
	{
	return true;
	}

	static void imx_pd_encoder_prepare(struct drm_encoder *encoder)
	{
	struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);

	imx_drm_set_bus_format(encoder, imxpd->bus_format);
	}

	static void imx_pd_encoder_commit(struct drm_encoder *encoder)
	{
	struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);

	drm_panel_prepare(imxpd->panel);
	drm_panel_enable(imxpd->panel);
	}

	static void imx_pd_encoder_mode_set(struct drm_encoder *encoder,
	struct drm_display_mode *orig_mode,
	struct drm_display_mode *mode)
	{
	}

	static void imx_pd_encoder_disable(struct drm_encoder *encoder)
	{
	struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);

	drm_panel_disable(imxpd->panel);
	drm_panel_unprepare(imxpd->panel);
	}

	static struct drm_connector_funcs imx_pd_connector_funcs = {
	.dpms = drm_helper_connector_dpms,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.detect = imx_pd_connector_detect,
	.destroy = imx_drm_connector_destroy,
	};

	static struct drm_connector_helper_funcs imx_pd_connector_helper_funcs = {
	.get_modes = imx_pd_connector_get_modes,
	.best_encoder = imx_pd_connector_best_encoder,
	};

	static struct drm_encoder_funcs imx_pd_encoder_funcs = {
	.destroy = imx_drm_encoder_destroy,
	};

	static struct drm_encoder_helper_funcs imx_pd_encoder_helper_funcs = {
	.dpms = imx_pd_encoder_dpms,
	.mode_fixup = imx_pd_encoder_mode_fixup,
	.prepare = imx_pd_encoder_prepare,
	.commit = imx_pd_encoder_commit,
	.mode_set = imx_pd_encoder_mode_set,
	.disable = imx_pd_encoder_disable,
	};

	static int imx_pd_register(struct drm_device *drm,
	struct imx_parallel_display *imxpd)
	{
	int ret;

	ret = imx_drm_encoder_parse_of(drm, &imxpd->encoder,
	imxpd->dev->of_node);
	if (ret)
	return ret;

	/* set the connector's dpms to OFF so that
	* drm_helper_connector_dpms() won't return
	* immediately since the current state is ON
	* at this point.
	*/
	imxpd->connector.dpms = DRM_MODE_DPMS_OFF;

	drm_encoder_helper_add(&imxpd->encoder, &imx_pd_encoder_helper_funcs);
	drm_encoder_init(drm, &imxpd->encoder, &imx_pd_encoder_funcs,
	DRM_MODE_ENCODER_NONE);

	drm_connector_helper_add(&imxpd->connector,
	&imx_pd_connector_helper_funcs);
	drm_connector_init(drm, &imxpd->connector, &imx_pd_connector_funcs,
	DRM_MODE_CONNECTOR_VGA);

	if (imxpd->panel)
	drm_panel_attach(imxpd->panel, &imxpd->connector);

	drm_mode_connector_attach_encoder(&imxpd->connector, &imxpd->encoder);

	imxpd->connector.encoder = &imxpd->encoder;

	return 0;
	}

	static int imx_pd_bind(struct device dev, struct device master, void *data)
	{
	struct drm_device *drm = data;
	struct device_node *np = dev->of_node;
	struct device_node *port;
	const u8 *edidp;
	struct imx_parallel_display *imxpd;
	int ret;
	const char *fmt;

	imxpd = devm_kzalloc(dev, sizeof(*imxpd), GFP_KERNEL);
	if (!imxpd)
	return -ENOMEM;

	edidp = of_get_property(np, "edid", &imxpd->edid_len);
	if (edidp)
	imxpd->edid = kmemdup(edidp, imxpd->edid_len, GFP_KERNEL);

	ret = of_property_read_string(np, "interface-pix-fmt", &fmt);
	if (!ret) {
	if (!strcmp(fmt, "rgb24"))
	imxpd->bus_format = MEDIA_BUS_FMT_RGB888_1X24;
	else if (!strcmp(fmt, "rgb565"))
	imxpd->bus_format = MEDIA_BUS_FMT_RGB565_1X16;
	else if (!strcmp(fmt, "bgr666"))
	imxpd->bus_format = MEDIA_BUS_FMT_RGB666_1X18;
	else if (!strcmp(fmt, "lvds666"))
	imxpd->bus_format = MEDIA_BUS_FMT_RGB666_1X24_CPADHI;
	}

	/* port@1 is the output port */
	port = of_graph_get_port_by_id(np, 1);
	if (port) {
	struct device_node endpoint, remote;

	endpoint = of_get_child_by_name(port, "endpoint");
	if (endpoint) {
	remote = of_graph_get_remote_port_parent(endpoint);
	if (remote)
	imxpd->panel = of_drm_find_panel(remote);
	if (!imxpd->panel)
	return -EPROBE_DEFER;
	}
	}

	imxpd->dev = dev;

	ret = imx_pd_register(drm, imxpd);
	if (ret)
	return ret;

	dev_set_drvdata(dev, imxpd);

	return 0;
	}

	static void imx_pd_unbind(struct device dev, struct device master,
	void *data)
	{
	struct imx_parallel_display *imxpd = dev_get_drvdata(dev);

	imxpd->encoder.funcs->destroy(&imxpd->encoder);
	imxpd->connector.funcs->destroy(&imxpd->connector);

	kfree(imxpd->edid);
	}

	static const struct component_ops imx_pd_ops = {
	.bind = imx_pd_bind,
	.unbind = imx_pd_unbind,
	};

	static int imx_pd_probe(struct platform_device *pdev)
	{
	return component_add(&pdev->dev, &imx_pd_ops);
	}

	static int imx_pd_remove(struct platform_device *pdev)
	{
	component_del(&pdev->dev, &imx_pd_ops);

	return 0;
	}

	static const struct of_device_id imx_pd_dt_ids[] = {
	{ .compatible = "fsl,imx-parallel-display", },
	{ /* sentinel */ }
	};
	MODULE_DEVICE_TABLE(of, imx_pd_dt_ids);

	static struct platform_driver imx_pd_driver = {
	.probe = imx_pd_probe,
	.remove = imx_pd_remove,
	.driver = {
	.of_match_table = imx_pd_dt_ids,
	.name = "imx-parallel-display",
	},
	};

	module_platform_driver(imx_pd_driver);

	MODULE_DESCRIPTION("i.MX parallel display driver");
	MODULE_AUTHOR("Sascha Hauer, Pengutronix");
	MODULE_LICENSE("GPL");
	MODULE_ALIAS("platform:imx-parallel-display");