[PATCH v2 2/2] drm/panel: Add Sharp LS043T1LE01 MIPI DSI panel

Bjorn Andersson
2015-10-30T22:35:10Z

From: Werner Johansson <werner.johansson@sonymobile.com>

This adds support for the Sharp panel found on the Qualcomm
Snapdragon 800 Dragonboard (APQ8074)

Signed-off-by: Werner Johansson <werner.johansson@sonymobile.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
---

Change since v1:
- Dropped -vid suffix from compatible

drivers/gpu/drm/panel/Kconfig | 9 +
drivers/gpu/drm/panel/Makefile | 1 +
drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c | 387 ++++++++++++++++++++++++
3 files changed, 397 insertions(+)
create mode 100644 drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 7d4704b1292b..da3b9c7889c4 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -51,4 +51,13 @@ config DRM_PANEL_SHARP_LQ101R1SX01
To compile this driver as a module, choose M here: the module
will be called panel-sharp-lq101r1sx01.

+config DRM_PANEL_SHARP_LS043T1LE01
+ tristate "Sharp LS043T1LE01 qHD video mode panel"
+ depends on OF
+ depends on DRM_MIPI_DSI
+ depends on BACKLIGHT_CLASS_DEVICE
+ help
+ Say Y here if you want to enable support for Sharp LS043T1LE01 qHD
+ (540x960) DSI panel as found on the Qualcomm APQ8074 Dragonboard
+
endmenu
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index d0f016dd7ddb..53de90aa49cd 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -3,3 +3,4 @@ obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o
obj-$(CONFIG_DRM_PANEL_SAMSUNG_LD9040) += panel-samsung-ld9040.o
obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E8AA0) += panel-samsung-s6e8aa0.o
obj-$(CONFIG_DRM_PANEL_SHARP_LQ101R1SX01) += panel-sharp-lq101r1sx01.o
+obj-$(CONFIG_DRM_PANEL_SHARP_LS043T1LE01) += panel-sharp-ls043t1le01.o
diff --git a/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c b/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c
new file mode 100644
index 000000000000..3aeb0bda4947
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c
@@ -0,0 +1,387 @@
+/*
+ * Copyright (C) 2015 Red Hat
+ * Copyright (C) 2015 Sony Mobile Communications Inc.
+ * Author: Werner Johansson <werner.johansson@sonymobile.com>
+ *
+ * Based on AUO panel driver by Rob Clark <robdclark@gmail.com>
+ *
+ * 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/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regulator/consumer.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_panel.h>
+
+#include <video/mipi_display.h>
+
+struct sharp_nt_panel {
+ struct drm_panel base;
+ struct mipi_dsi_device *dsi;
+
+ struct backlight_device *backlight;
+ struct regulator *supply;
+ struct gpio_desc *reset_gpio;
+
+ bool prepared;
+ bool enabled;
+
+ const struct drm_display_mode *mode;
+};
+
+static inline struct sharp_nt_panel *to_sharp_nt_panel(struct drm_panel *panel)
+{
+ return container_of(panel, struct sharp_nt_panel, base);
+}
+
+static int sharp_nt_panel_init(struct sharp_nt_panel *sharp_nt)
+{
+ struct mipi_dsi_device *dsi = sharp_nt->dsi;
+ int ret;
+
+ dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+ ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
+ if (ret < 0)
+ return ret;
+
+ msleep(120);
+
+ /* Novatek two-lane operation */
+ ret = mipi_dsi_dcs_write(dsi, 0xae, (u8[]){ 0x03 }, 1);
+ if (ret < 0)
+ return ret;
+
+ /* Set both MCU and RGB I/F to 24bpp */
+ ret = mipi_dsi_dcs_set_pixel_format(dsi, MIPI_DCS_PIXEL_FMT_24BIT |
+ (MIPI_DCS_PIXEL_FMT_24BIT << 4));
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int sharp_nt_panel_on(struct sharp_nt_panel *sharp_nt)
+{
+ struct mipi_dsi_device *dsi = sharp_nt->dsi;
+ int ret;
+
+ dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+ ret = mipi_dsi_dcs_set_display_on(dsi);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int sharp_nt_panel_off(struct sharp_nt_panel *sharp_nt)
+{
+ struct mipi_dsi_device *dsi = sharp_nt->dsi;
+ int ret;
+
+ dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+ ret = mipi_dsi_dcs_set_display_off(dsi);
+ if (ret < 0)
+ return ret;
+
+ ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+
+static int sharp_nt_panel_disable(struct drm_panel *panel)
+{
+ struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
+
+ if (!sharp_nt->enabled)
+ return 0;
+
+ if (sharp_nt->backlight) {
+ sharp_nt->backlight->props.power = FB_BLANK_POWERDOWN;
+ backlight_update_status(sharp_nt->backlight);
+ }
+
+ sharp_nt->enabled = false;
+
+ return 0;
+}
+
+static int sharp_nt_panel_unprepare(struct drm_panel *panel)
+{
+ struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
+ int ret;
+
+ if (!sharp_nt->prepared)
+ return 0;
+
+ ret = sharp_nt_panel_off(sharp_nt);
+ if (ret < 0) {
+ dev_err(panel->dev, "failed to set panel off: %d\n", ret);
+ return ret;
+ }
+
+ regulator_disable(sharp_nt->supply);
+ if (sharp_nt->reset_gpio)
+ gpiod_set_value(sharp_nt->reset_gpio, 0);
+
+ sharp_nt->prepared = false;
+
+ return 0;
+}
+
+static int sharp_nt_panel_prepare(struct drm_panel *panel)
+{
+ struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
+ int ret;
+
+ if (sharp_nt->prepared)
+ return 0;
+
+ ret = regulator_enable(sharp_nt->supply);
+ if (ret < 0)
+ return ret;
+
+ msleep(20);
+
+ if (sharp_nt->reset_gpio) {
+ gpiod_set_value(sharp_nt->reset_gpio, 1);
+ msleep(1);
+ gpiod_set_value(sharp_nt->reset_gpio, 0);
+ msleep(1);
+ gpiod_set_value(sharp_nt->reset_gpio, 1);
+ msleep(10);
+ }
+
+ ret = sharp_nt_panel_init(sharp_nt);
+ if (ret < 0) {
+ dev_err(panel->dev, "failed to init panel: %d\n", ret);
+ goto poweroff;
+ }
+
+ ret = sharp_nt_panel_on(sharp_nt);
+ if (ret < 0) {
+ dev_err(panel->dev, "failed to set panel on: %d\n", ret);
+ goto poweroff;
+ }
+
+ sharp_nt->prepared = true;
+
+ return 0;
+
+poweroff:
+ regulator_disable(sharp_nt->supply);
+ if (sharp_nt->reset_gpio)
+ gpiod_set_value(sharp_nt->reset_gpio, 0);
+ return ret;
+}
+
+static int sharp_nt_panel_enable(struct drm_panel *panel)
+{
+ struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
+
+ if (sharp_nt->enabled)
+ return 0;
+
+ if (sharp_nt->backlight) {
+ sharp_nt->backlight->props.power = FB_BLANK_UNBLANK;
+ backlight_update_status(sharp_nt->backlight);
+ }
+
+ sharp_nt->enabled = true;
+
+ return 0;
+}
+
+static const struct drm_display_mode default_mode = {
+ .clock = 41118,
+ .hdisplay = 540,
+ .hsync_start = 540 + 48,
+ .hsync_end = 540 + 48 + 80,
+ .htotal = 540 + 48 + 80 + 32,
+ .vdisplay = 960,
+ .vsync_start = 960 + 3,
+ .vsync_end = 960 + 3 + 15,
+ .vtotal = 960 + 3 + 15 + 1,
+ .vrefresh = 60,
+};
+
+static int sharp_nt_panel_get_modes(struct drm_panel *panel)
+{
+ struct drm_display_mode *mode;
+
+ mode = drm_mode_duplicate(panel->drm, &default_mode);
+ if (!mode) {
+ dev_err(panel->drm->dev, "failed to add mode %ux%ux@%u\n",
+ default_mode.hdisplay, default_mode.vdisplay,
+ default_mode.vrefresh);
+ return -ENOMEM;
+ }
+
+ drm_mode_set_name(mode);
+
+ drm_mode_probed_add(panel->connector, mode);
+
+ panel->connector->display_info.width_mm = 54;
+ panel->connector->display_info.height_mm = 95;
+
+ return 1;
+}
+
+static const struct drm_panel_funcs sharp_nt_panel_funcs = {
+ .disable = sharp_nt_panel_disable,
+ .unprepare = sharp_nt_panel_unprepare,
+ .prepare = sharp_nt_panel_prepare,
+ .enable = sharp_nt_panel_enable,
+ .get_modes = sharp_nt_panel_get_modes,
+};
+
+static int sharp_nt_panel_add(struct sharp_nt_panel *sharp_nt)
+{
+ struct device *dev = &sharp_nt->dsi->dev;
+ struct device_node *np;
+ int ret;
+
+ sharp_nt->mode = &default_mode;
+
+ sharp_nt->supply = devm_regulator_get(dev, "avdd");
+ if (IS_ERR(sharp_nt->supply))
+ return PTR_ERR(sharp_nt->supply);
+
+ sharp_nt->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(sharp_nt->reset_gpio)) {
+ dev_err(dev, "cannot get reset-gpios %ld\n",
+ PTR_ERR(sharp_nt->reset_gpio));
+ sharp_nt->reset_gpio = NULL;
+ } else {
+ gpiod_set_value(sharp_nt->reset_gpio, 0);
+ }
+
+ np = of_parse_phandle(dev->of_node, "backlight", 0);
+ if (np) {
+ sharp_nt->backlight = of_find_backlight_by_node(np);
+ of_node_put(np);
+
+ if (!sharp_nt->backlight)
+ return -EPROBE_DEFER;
+ }
+
+ drm_panel_init(&sharp_nt->base);
+ sharp_nt->base.funcs = &sharp_nt_panel_funcs;
+ sharp_nt->base.dev = &sharp_nt->dsi->dev;
+
+ ret = drm_panel_add(&sharp_nt->base);
+ if (ret < 0)
+ goto put_backlight;
+
+ return 0;
+
+put_backlight:
+ if (sharp_nt->backlight)
+ put_device(&sharp_nt->backlight->dev);
+
+ return ret;
+}
+
+static void sharp_nt_panel_del(struct sharp_nt_panel *sharp_nt)
+{
+ if (sharp_nt->base.dev)
+ drm_panel_remove(&sharp_nt->base);
+
+ if (sharp_nt->backlight)
+ put_device(&sharp_nt->backlight->dev);
+}
+
+static int sharp_nt_panel_probe(struct mipi_dsi_device *dsi)
+{
+ struct sharp_nt_panel *sharp_nt;
+ int ret;
+
+ dsi->lanes = 2;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
+ MIPI_DSI_MODE_VIDEO_HSE |
+ MIPI_DSI_CLOCK_NON_CONTINUOUS |
+ MIPI_DSI_MODE_EOT_PACKET;
+
+ sharp_nt = devm_kzalloc(&dsi->dev, sizeof(*sharp_nt), GFP_KERNEL);
+ if (!sharp_nt)
+ return -ENOMEM;
+
+ mipi_dsi_set_drvdata(dsi, sharp_nt);
+
+ sharp_nt->dsi = dsi;
+
+ ret = sharp_nt_panel_add(sharp_nt);
+ if (ret < 0)
+ return ret;
+
+ return mipi_dsi_attach(dsi);
+}
+
+static int sharp_nt_panel_remove(struct mipi_dsi_device *dsi)
+{
+ struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi);
+ int ret;
+
+ ret = sharp_nt_panel_disable(&sharp_nt->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);
+
+ drm_panel_detach(&sharp_nt->base);
+ sharp_nt_panel_del(sharp_nt);
+
+ return 0;
+}
+
+static void sharp_nt_panel_shutdown(struct mipi_dsi_device *dsi)
+{
+ struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi);
+
+ sharp_nt_panel_disable(&sharp_nt->base);
+}
+
+static const struct of_device_id sharp_nt_of_match[] = {
+ { .compatible = "sharp,ls043t1le01-qhd", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, sharp_nt_of_match);
+
+static struct mipi_dsi_driver sharp_nt_panel_driver = {
+ .driver = {
+ .name = "panel-sharp-ls043t1le01-qhd",
+ .of_match_table = sharp_nt_of_match,
+ },
+ .probe = sharp_nt_panel_probe,
+ .remove = sharp_nt_panel_remove,
+ .shutdown = sharp_nt_panel_shutdown,
+};
+module_mipi_dsi_driver(sharp_nt_panel_driver);
+
+MODULE_AUTHOR("Werner Johansson <werner.johansson@sonymobile.com>");
+MODULE_DESCRIPTION("Sharp LS043T1LE01 NT35565-based qHD (540x960) video mode panel driver");
+MODULE_LICENSE("GPL v2");
--
2.4.2