1 files changed, 42 insertions, 96 deletions

diff --git a/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c b/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c
index 99caa7835e7b..3513e5c4dd8c 100644
--- a/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c
+++ b/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c
@@ -1,39 +1,26 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2016 InforceComputing
  * Author: Vinay Simha BN <simhavcs@gmail.com>
  *
  * Copyright (C) 2016 Linaro Ltd
  * Author: Sumit Semwal <sumit.semwal@linaro.org>
- *
- * From internet archives, the panel for Nexus 7 2nd Gen, 2013 model is a
- * JDI model LT070ME05000, and its data sheet is at:
- * http://panelone.net/en/7-0-inch/JDI_LT070ME05000_7.0_inch-datasheet
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * 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.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program.  If not, see <http://www.gnu.org/licenses/>.
  */
+
 #include <linux/backlight.h>
+#include <linux/delay.h>
 #include <linux/gpio/consumer.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/regulator/consumer.h>
 
-#include <drm/drmP.h>
+#include <video/mipi_display.h>
+
 #include <drm/drm_crtc.h>
 #include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
 #include <drm/drm_panel.h>
 
-#include <video/mipi_display.h>
-
 static const char * const regulator_names[] = {
 	"vddp",
 	"iovcc"
@@ -50,9 +37,6 @@ struct jdi_panel {
 	struct gpio_desc *dcdc_en_gpio;
 	struct backlight_device *backlight;
 
-	bool prepared;
-	bool enabled;
-
 	const struct drm_display_mode *mode;
 };
 
@@ -189,13 +173,8 @@ static int jdi_panel_disable(struct drm_panel *panel)
 {
 	struct jdi_panel *jdi = to_jdi_panel(panel);
 
-	if (!jdi->enabled)
-		return 0;
-
 	backlight_disable(jdi->backlight);
 
-	jdi->enabled = false;
-
 	return 0;
 }
 
@@ -205,9 +184,6 @@ static int jdi_panel_unprepare(struct drm_panel *panel)
 	struct device *dev = &jdi->dsi->dev;
 	int ret;
 
-	if (!jdi->prepared)
-		return 0;
-
 	jdi_panel_off(jdi);
 
 	ret = regulator_bulk_disable(ARRAY_SIZE(jdi->supplies), jdi->supplies);
@@ -220,8 +196,6 @@ static int jdi_panel_unprepare(struct drm_panel *panel)
 
 	gpiod_set_value(jdi->dcdc_en_gpio, 0);
 
-	jdi->prepared = false;
-
 	return 0;
 }
 
@@ -231,9 +205,6 @@ static int jdi_panel_prepare(struct drm_panel *panel)
 	struct device *dev = &jdi->dsi->dev;
 	int ret;
 
-	if (jdi->prepared)
-		return 0;
-
 	ret = regulator_bulk_enable(ARRAY_SIZE(jdi->supplies), jdi->supplies);
 	if (ret < 0) {
 		dev_err(dev, "regulator enable failed, %d\n", ret);
@@ -263,8 +234,6 @@ static int jdi_panel_prepare(struct drm_panel *panel)
 		goto poweroff;
 	}
 
-	jdi->prepared = true;
-
 	return 0;
 
 poweroff:
@@ -285,13 +254,8 @@ static int jdi_panel_enable(struct drm_panel *panel)
 {
 	struct jdi_panel *jdi = to_jdi_panel(panel);
 
-	if (jdi->enabled)
-		return 0;
-
 	backlight_enable(jdi->backlight);
 
-	jdi->enabled = true;
-
 	return 0;
 }
 
@@ -305,30 +269,30 @@ static const struct drm_display_mode default_mode = {
 		.vsync_start = 1920 + 3,
 		.vsync_end = 1920 + 3 + 5,
 		.vtotal = 1920 + 3 + 5 + 6,
-		.vrefresh = 60,
 		.flags = 0,
 };
 
-static int jdi_panel_get_modes(struct drm_panel *panel)
+static int jdi_panel_get_modes(struct drm_panel *panel,
+			       struct drm_connector *connector)
 {
 	struct drm_display_mode *mode;
 	struct jdi_panel *jdi = to_jdi_panel(panel);
 	struct device *dev = &jdi->dsi->dev;
 
-	mode = drm_mode_duplicate(panel->drm, &default_mode);
+	mode = drm_mode_duplicate(connector->dev, &default_mode);
 	if (!mode) {
 		dev_err(dev, "failed to add mode %ux%ux@%u\n",
 			default_mode.hdisplay, default_mode.vdisplay,
-			default_mode.vrefresh);
+			drm_mode_vrefresh(&default_mode));
 		return -ENOMEM;
 	}
 
 	drm_mode_set_name(mode);
 
-	drm_mode_probed_add(panel->connector, mode);
+	drm_mode_probed_add(connector, mode);
 
-	panel->connector->display_info.width_mm = 95;
-	panel->connector->display_info.height_mm = 151;
+	connector->display_info.width_mm = 95;
+	connector->display_info.height_mm = 151;
 
 	return 1;
 }
@@ -413,46 +377,34 @@ static int jdi_panel_add(struct jdi_panel *jdi)
 
 	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(jdi->supplies),
 				      jdi->supplies);
-	if (ret < 0) {
-		dev_err(dev, "failed to init regulator, ret=%d\n", ret);
-		return ret;
-	}
+	if (ret < 0)
+		return dev_err_probe(dev, ret,
+				     "failed to init regulator, ret=%d\n", ret);
 
 	jdi->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
 	if (IS_ERR(jdi->enable_gpio)) {
-		ret = PTR_ERR(jdi->enable_gpio);
-		dev_err(dev, "cannot get enable-gpio %d\n", ret);
-		return ret;
+		return dev_err_probe(dev, PTR_ERR(jdi->enable_gpio),
+				     "cannot get enable-gpio %d\n", ret);
 	}
 
 	jdi->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
-	if (IS_ERR(jdi->reset_gpio)) {
-		ret = PTR_ERR(jdi->reset_gpio);
-		dev_err(dev, "cannot get reset-gpios %d\n", ret);
-		return ret;
-	}
+	if (IS_ERR(jdi->reset_gpio))
+		return dev_err_probe(dev, PTR_ERR(jdi->reset_gpio),
+				     "cannot get reset-gpios %d\n", ret);
 
 	jdi->dcdc_en_gpio = devm_gpiod_get(dev, "dcdc-en", GPIOD_OUT_LOW);
-	if (IS_ERR(jdi->dcdc_en_gpio)) {
-		ret = PTR_ERR(jdi->dcdc_en_gpio);
-		dev_err(dev, "cannot get dcdc-en-gpio %d\n", ret);
-		return ret;
-	}
+	if (IS_ERR(jdi->dcdc_en_gpio))
+		return dev_err_probe(dev, PTR_ERR(jdi->dcdc_en_gpio),
+				     "cannot get dcdc-en-gpio %d\n", ret);
 
 	jdi->backlight = drm_panel_create_dsi_backlight(jdi->dsi);
-	if (IS_ERR(jdi->backlight)) {
-		ret = PTR_ERR(jdi->backlight);
-		dev_err(dev, "failed to register backlight %d\n", ret);
-		return ret;
-	}
-
-	drm_panel_init(&jdi->base);
-	jdi->base.funcs = &jdi_panel_funcs;
-	jdi->base.dev = &jdi->dsi->dev;
+	if (IS_ERR(jdi->backlight))
+		return dev_err_probe(dev, PTR_ERR(jdi->backlight),
+				     "failed to register backlight %d\n", ret);
 
-	ret = drm_panel_add(&jdi->base);
+	drm_panel_add(&jdi->base);
 
-	return ret;
+	return 0;
 }
 
 static void jdi_panel_del(struct jdi_panel *jdi)
@@ -471,9 +423,11 @@ static int jdi_panel_probe(struct mipi_dsi_device *dsi)
 	dsi->mode_flags =  MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_VIDEO |
 			   MIPI_DSI_CLOCK_NON_CONTINUOUS;
 
-	jdi = devm_kzalloc(&dsi->dev, sizeof(*jdi), GFP_KERNEL);
-	if (!jdi)
-		return -ENOMEM;
+	jdi = devm_drm_panel_alloc(&dsi->dev, __typeof(*jdi), base,
+				   &jdi_panel_funcs, DRM_MODE_CONNECTOR_DSI);
+
+	if (IS_ERR(jdi))
+		return PTR_ERR(jdi);
 
 	mipi_dsi_set_drvdata(dsi, jdi);
 
@@ -483,33 +437,26 @@ static int jdi_panel_probe(struct mipi_dsi_device *dsi)
 	if (ret < 0)
 		return ret;
 
-	return mipi_dsi_attach(dsi);
+	ret = mipi_dsi_attach(dsi);
+	if (ret < 0) {
+		jdi_panel_del(jdi);
+		return ret;
+	}
+
+	return 0;
 }
 
-static int jdi_panel_remove(struct mipi_dsi_device *dsi)
+static void jdi_panel_remove(struct mipi_dsi_device *dsi)
 {
 	struct jdi_panel *jdi = mipi_dsi_get_drvdata(dsi);
 	int ret;
 
-	ret = jdi_panel_disable(&jdi->base);
-	if (ret < 0)
-		dev_err(&dsi->dev, "failed to disable panel: %d\n", ret);
-
 	ret = mipi_dsi_detach(dsi);
 	if (ret < 0)
 		dev_err(&dsi->dev, "failed to detach from DSI host: %d\n",
 			ret);
 
 	jdi_panel_del(jdi);
-
-	return 0;
-}
-
-static void jdi_panel_shutdown(struct mipi_dsi_device *dsi)
-{
-	struct jdi_panel *jdi = mipi_dsi_get_drvdata(dsi);
-
-	jdi_panel_disable(&jdi->base);
 }
 
 static struct mipi_dsi_driver jdi_panel_driver = {
@@ -519,7 +466,6 @@ static struct mipi_dsi_driver jdi_panel_driver = {
 	},
 	.probe = jdi_panel_probe,
 	.remove = jdi_panel_remove,
-	.shutdown = jdi_panel_shutdown,
 };
 module_mipi_dsi_driver(jdi_panel_driver);