On Thu, Apr 14, 2016 at 04:17:45PM +0530, Vinay Simha BN wrote: > Add support for the JDI lt070me05000 WUXGA DSI panel used in > Nexus 7 2013 devices. > > Programming sequence for the panel is was originally found in the > android-msm-flo-3.4-lollipop-release branch from: > https://android.googlesource.com/kernel/msm.git > > And video mode setting is from dsi-panel-jdi-dualmipi1-video.dtsi > file in: > git://codeaurora.org/kernel/msm-3.10.git LNX.LA.3.6_rb1.27 > > Other fixes folded in were provided > by Archit Taneja <archit.taneja@xxxxxxxxx> > > Cc: Archit Taneja <archit.taneja@xxxxxxxxx> > Signed-off-by: Vinay Simha BN <simhavcs@xxxxxxxxx> > [sumit.semwal: Ported to the drm/panel framework] > Signed-off-by: Sumit Semwal <sumit.semwal@xxxxxxxxxx> > [jstultz: Cherry-picked to mainline, folded down other fixes > from Vinay and Archit] > Signed-off-by: John Stultz <john.stultz@xxxxxxxxxx> > Acked-by: John Stultz <john.stultz@xxxxxxxxxx> > [vinay simha bn: added interface setting cmd mode, cmd or video > mode panel setting selection in panel_init based on mode_flags] > Signed-off-by: Vinay Simha BN <simhavcs@xxxxxxxxx> > --- > .../bindings/display/panel/jdi,lt070me05000.txt | 27 + > .../devicetree/bindings/vendor-prefixes.txt | 1 + > drivers/gpu/drm/panel/Kconfig | 11 + > drivers/gpu/drm/panel/Makefile | 1 + > drivers/gpu/drm/panel/panel-jdi-lt070me05000.c | 685 +++++++++++++++++++++ > 5 files changed, 725 insertions(+) > create mode 100644 Documentation/devicetree/bindings/display/panel/jdi,lt070me05000.txt > create mode 100644 drivers/gpu/drm/panel/panel-jdi-lt070me05000.c > > diff --git a/Documentation/devicetree/bindings/display/panel/jdi,lt070me05000.txt b/Documentation/devicetree/bindings/display/panel/jdi,lt070me05000.txt > new file mode 100644 > index 0000000..35c5ac7 > --- /dev/null > +++ b/Documentation/devicetree/bindings/display/panel/jdi,lt070me05000.txt > @@ -0,0 +1,27 @@ > +JDI model LT070ME05000 1920x1200 7" DSI Panel > + > +Basic data sheet is at: > + http://panelone.net/en/7-0-inch/JDI_LT070ME05000_7.0_inch-datasheet > + > +This panel has video mode implemented currently in the driver. As Thierry already mentioned, this has nothing to do with the binding. > + > +Required properties: > +- compatible: should be "jdi,lt070me05000" > + > +Optional properties: > +- power-supply: phandle of the regulator that provides the supply voltage > +- reset-gpio: phandle of gpio for reset line reset-gpios > +- backlight: phandle of the backlight device attached to the panel > + > +Example: > + > + dsi@54300000 { > + panel: panel@0 { > + compatible = "jdi,lt070me05000"; > + reg = <0>; > + > + power-supply = <...>; > + reset-gpio = <...>; > + backlight = <...>; > + }; > + }; > diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt > index a580f3e..ec42bb4 100644 > --- a/Documentation/devicetree/bindings/vendor-prefixes.txt > +++ b/Documentation/devicetree/bindings/vendor-prefixes.txt > @@ -130,6 +130,7 @@ invensense InvenSense Inc. > isee ISEE 2007 S.L. > isil Intersil > issi Integrated Silicon Solutions Inc. > +jdi Japan Display Inc. > jedec JEDEC Solid State Technology Association > karo Ka-Ro electronics GmbH > keymile Keymile GmbH > diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig > index 1500ab9..f41690e 100644 > --- a/drivers/gpu/drm/panel/Kconfig > +++ b/drivers/gpu/drm/panel/Kconfig > @@ -61,6 +61,17 @@ 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_JDI_LT070ME05000 > + tristate "JDI LT070ME05000 WUXGA DSI 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 JDI WUXGA DSI video/ > + command mode panel as found in Google Nexus 7 (2013) devices. > + The panel has a 1200(RGB)×1920 (WUXGA) resolution and uses > + 24 bit RGB per pixel. > + > config DRM_PANEL_SHARP_LS043T1LE01 > tristate "Sharp LS043T1LE01 qHD video mode panel" > depends on OF > diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile > index f277eed..e6c6fc8 100644 > --- a/drivers/gpu/drm/panel/Makefile > +++ b/drivers/gpu/drm/panel/Makefile > @@ -5,3 +5,4 @@ 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 > +obj-$(CONFIG_DRM_PANEL_JDI_LT070ME05000) += panel-jdi-lt070me05000.o > diff --git a/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c b/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c > new file mode 100644 > index 0000000..051aa1b > --- /dev/null > +++ b/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c > @@ -0,0 +1,685 @@ > +/* > + * Copyright (C) 2015 InforceComputing > + * Author: Vinay Simha BN <simhavcs@xxxxxxxxx> > + * > + * Copyright (C) 2015 Linaro Ltd > + * Author: Sumit Semwal <sumit.semwal@xxxxxxxxxx> > + * > + * 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> > + > +/* > + * 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 > + */ > +struct jdi_panel { > + struct drm_panel base; > + struct mipi_dsi_device *dsi; > + > + /* TODO: Add backilght support */ > + struct backlight_device *backlight; > + struct regulator *supply; > + struct gpio_desc *reset_gpio; > + struct gpio_desc *enable_gpio; > + struct gpio_desc *vcc_gpio; > + > + struct regulator *backlit; > + struct regulator *lvs7; > + struct regulator *avdd; > + struct regulator *iovdd; > + struct gpio_desc *pwm_gpio; > + > + bool prepared; > + bool enabled; > + > + const struct drm_display_mode *mode; > +}; > + > +static inline struct jdi_panel *to_jdi_panel(struct drm_panel *panel) > +{ > + return container_of(panel, struct jdi_panel, base); > +} > + > +static char MCAP[2] = {0xB0, 0x00}; > +static char interface_setting_cmd[6] = {0xB3, 0x04, 0x08, 0x00, 0x22, 0x00}; > +static char interface_setting[6] = {0xB3, 0x26, 0x08, 0x00, 0x20, 0x00}; > + > +static char interface_ID_setting[2] = {0xB4, 0x0C}; > +static char DSI_control[3] = {0xB6, 0x3A, 0xD3}; > + > +static char tear_scan_line[3] = {0x44, 0x03, 0x00}; > + > +/* for fps control, set fps to 60.32Hz */ > +static char LTPS_timing_setting[2] = {0xC6, 0x78}; > +static char sequencer_timing_control[2] = {0xD6, 0x01}; > + > +/* set brightness */ > +static char write_display_brightness[] = {0x51, 0xFF}; > +/* enable LEDPWM pin output, turn on LEDPWM output, turn off pwm dimming */ > +static char write_control_display[] = {0x53, 0x24}; > +/* > + * choose cabc mode, 0x00(-0%), 0x01(-15%), 0x02(-40%), 0x03(-54%), > + * disable SRE(sunlight readability enhancement) > + */ > +static char write_cabc[] = {0x55, 0x00}; > +/* for cabc mode 0x1(-15%) */ > +static char backlight_control1[] = {0xB8, 0x07, 0x87, 0x26, 0x18, 0x00, 0x32}; > +/* for cabc mode 0x2(-40%) */ > +static char backlight_control2[] = {0xB9, 0x07, 0x75, 0x61, 0x20, 0x16, 0x87}; > +/* for cabc mode 0x3(-54%) */ > +static char backlight_control3[] = {0xBA, 0x07, 0x70, 0x81, 0x20, 0x45, 0xB4}; > +/* for pwm frequency and dimming control */ > +static char backlight_control4[] = {0xCE, 0x7D, 0x40, 0x48, 0x56, 0x67, 0x78, > + 0x88, 0x98, 0xA7, 0xB5, 0xC3, 0xD1, 0xDE, 0xE9, 0xF2, 0xFA, > + 0xFF, 0x37, 0xF5, 0x0F, 0x0F, 0x42, 0x00}; > + > +static int jdi_panel_init(struct jdi_panel *jdi) > +{ > + struct mipi_dsi_device *dsi = jdi->dsi; > + int ret; > + > + dsi->mode_flags |= MIPI_DSI_MODE_LPM; > + > + if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) { > + ret = mipi_dsi_dcs_soft_reset(dsi); > + if (ret < 0) > + return ret; > + > + mdelay(10); > + > + ret = mipi_dsi_dcs_set_pixel_format(dsi, 0x70); > + if (ret < 0) > + return ret; > + > + ret = mipi_dsi_dcs_set_column_address(dsi, 0x0000, 0x04AF); > + if (ret < 0) > + return ret; > + > + ret = mipi_dsi_dcs_set_page_address(dsi, 0x0000, 0x077F); > + if (ret < 0) > + return ret; > + > + ret = mipi_dsi_dcs_set_tear_on(dsi, > + MIPI_DSI_DCS_TEAR_MODE_VBLANK); > + if (ret < 0) > + return ret; > + mdelay(5); > + > + ret = mipi_dsi_generic_write(dsi, tear_scan_line, > + sizeof(tear_scan_line)); > + if (ret < 0) > + return ret; > + > + ret = mipi_dsi_dcs_write_buffer(dsi, write_display_brightness, > + sizeof(write_display_brightness) > + ); > + if (ret < 0) > + return ret; > + > + ret = mipi_dsi_dcs_write_buffer(dsi, write_control_display, > + sizeof(write_control_display)); > + if (ret < 0) > + return ret; > + > + ret = mipi_dsi_dcs_write_buffer(dsi, write_cabc, > + sizeof(write_cabc)); > + if (ret < 0) > + return ret; > + > + ret = mipi_dsi_dcs_exit_sleep_mode(dsi); > + if (ret < 0) > + return ret; > + mdelay(120); > + > + ret = mipi_dsi_generic_write(dsi, MCAP, sizeof(MCAP)); > + if (ret < 0) > + return ret; > + mdelay(10); > + > + ret = mipi_dsi_generic_write(dsi, interface_setting, > + sizeof(interface_setting)); > + if (ret < 0) > + return ret; > + mdelay(20); > + > + backlight_control4[18] = 0x04; > + backlight_control4[19] = 0x00; > + > + ret = mipi_dsi_generic_write(dsi, backlight_control4, > + sizeof(backlight_control4)); > + if (ret < 0) > + return ret; > + mdelay(20); > + > + MCAP[1] = 0x03; > + ret = mipi_dsi_generic_write(dsi, MCAP, sizeof(MCAP)); > + if (ret < 0) > + return ret; > + } else { > + /* > + * TODO : need to verify panel settings when > + * dsi cmd mode supported for apq8064 - simhavcs > + */ > + ret = mipi_dsi_dcs_soft_reset(dsi); > + if (ret < 0) > + return ret; > + > + mdelay(5); > + > + ret = mipi_dsi_generic_write(dsi, MCAP, sizeof(MCAP)); > + if (ret < 0) > + return ret; > + > + ret = mipi_dsi_generic_write(dsi, interface_setting_cmd, > + sizeof(interface_setting_cmd)); > + if (ret < 0) > + return ret; > + > + ret = mipi_dsi_generic_write(dsi, interface_ID_setting, > + sizeof(interface_ID_setting)); > + if (ret < 0) > + return ret; > + > + ret = mipi_dsi_generic_write(dsi, DSI_control, > + sizeof(DSI_control)); > + if (ret < 0) > + return ret; > + > + ret = mipi_dsi_generic_write(dsi, LTPS_timing_setting, > + sizeof(LTPS_timing_setting)); > + if (ret < 0) > + return ret; > + > + ret = mipi_dsi_generic_write(dsi, sequencer_timing_control, > + sizeof(sequencer_timing_control)); > + if (ret < 0) > + return ret; > + > + ret = mipi_dsi_dcs_write_buffer(dsi, write_display_brightness, > + sizeof(write_display_brightness) > + ); > + if (ret < 0) > + return ret; > + > + ret = mipi_dsi_dcs_write_buffer(dsi, write_control_display, > + sizeof(write_control_display)); > + if (ret < 0) > + return ret; > + > + ret = mipi_dsi_dcs_write_buffer(dsi, write_cabc, > + sizeof(write_cabc)); > + if (ret < 0) > + return ret; > + > + ret = mipi_dsi_generic_write(dsi, backlight_control1, > + sizeof(backlight_control1)); > + if (ret < 0) > + return ret; > + > + ret = mipi_dsi_generic_write(dsi, backlight_control2, > + sizeof(backlight_control2)); > + if (ret < 0) > + return ret; > + > + ret = mipi_dsi_generic_write(dsi, backlight_control3, > + sizeof(backlight_control3)); > + if (ret < 0) > + return ret; > + > + ret = mipi_dsi_generic_write(dsi, backlight_control4, > + sizeof(backlight_control4)); > + if (ret < 0) > + return ret; > + > + ret = mipi_dsi_dcs_set_pixel_format(dsi, 0x77); > + if (ret < 0) > + return ret; > + > + ret = mipi_dsi_dcs_set_column_address(dsi, 0x0000, 0x04AF); > + if (ret < 0) > + return ret; > + > + ret = mipi_dsi_dcs_set_page_address(dsi, 0x0000, 0x077F); > + if (ret < 0) > + return ret; > + mdelay(120); > + > + ret = mipi_dsi_dcs_exit_sleep_mode(dsi); > + if (ret < 0) > + return ret; > + } > + > + return 0; > +} > + > +static int jdi_panel_on(struct jdi_panel *jdi) > +{ > + struct mipi_dsi_device *dsi = jdi->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 jdi_panel_off(struct jdi_panel *jdi) > +{ > + struct mipi_dsi_device *dsi = jdi->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; > + > + ret = mipi_dsi_dcs_set_tear_off(dsi); > + if (ret < 0) > + return ret; > + > + msleep(100); > + > + return 0; > +} > + > +static int jdi_panel_disable(struct drm_panel *panel) > +{ > + struct jdi_panel *jdi = to_jdi_panel(panel); > + > + if (!jdi->enabled) > + return 0; > + > + DRM_DEBUG("disable\n"); > + > + if (jdi->backlight) { > + jdi->backlight->props.power = FB_BLANK_POWERDOWN; > + backlight_update_status(jdi->backlight); > + } > + > + jdi->enabled = false; > + > + return 0; > +} > + > +static int jdi_panel_unprepare(struct drm_panel *panel) > +{ > + struct jdi_panel *jdi = to_jdi_panel(panel); > + int ret; > + > + if (!jdi->prepared) > + return 0; > + > + DRM_DEBUG("unprepare\n"); > + > + ret = jdi_panel_off(jdi); > + if (ret) { > + dev_err(panel->dev, "failed to set panel off: %d\n", ret); > + return ret; > + } > + > + regulator_disable(jdi->supply); > + > + if (jdi->vcc_gpio) > + gpiod_set_value(jdi->vcc_gpio, 0); > + > + if (jdi->reset_gpio) > + gpiod_set_value(jdi->reset_gpio, 0); > + > + if (jdi->enable_gpio) > + gpiod_set_value(jdi->enable_gpio, 0); > + > + jdi->prepared = false; > + > + return 0; > +} > + > +static int jdi_panel_prepare(struct drm_panel *panel) > +{ > + struct jdi_panel *jdi = to_jdi_panel(panel); > + int ret; > + > + if (jdi->prepared) > + return 0; > + > + DRM_DEBUG("prepare\n"); > + > + ret = regulator_enable(jdi->iovdd); > + if (ret < 0) > + return ret; > + > + ret = regulator_enable(jdi->avdd); > + if (ret < 0) > + return ret; > + > + ret = regulator_enable(jdi->backlit); > + if (ret < 0) > + return ret; > + > + ret = regulator_enable(jdi->lvs7); > + if (ret < 0) > + return ret; > + > + ret = regulator_enable(jdi->supply); > + if (ret < 0) > + return ret; > + > + msleep(20); > + > + if (jdi->vcc_gpio) { > + gpiod_set_value(jdi->vcc_gpio, 1); > + usleep_range(10, 20); > + } > + > + if (jdi->reset_gpio) { > + gpiod_set_value(jdi->reset_gpio, 1); > + usleep_range(10, 20); > + } > + > + if (jdi->pwm_gpio) { > + gpiod_set_value(jdi->pwm_gpio, 1); > + usleep_range(10, 20); > + } > + > + if (jdi->enable_gpio) { > + gpiod_set_value(jdi->enable_gpio, 1); > + usleep_range(10, 20); > + } > + > + ret = jdi_panel_init(jdi); > + if (ret) { > + dev_err(panel->dev, "failed to init panel: %d\n", ret); > + goto poweroff; > + } > + > + ret = jdi_panel_on(jdi); > + if (ret) { > + dev_err(panel->dev, "failed to set panel on: %d\n", ret); > + goto poweroff; > + } > + > + jdi->prepared = true; > + > + return 0; > + > +poweroff: > + regulator_disable(jdi->supply); > + if (jdi->reset_gpio) > + gpiod_set_value(jdi->reset_gpio, 0); > + if (jdi->enable_gpio) > + gpiod_set_value(jdi->enable_gpio, 0); > + if (jdi->vcc_gpio) > + gpiod_set_value(jdi->vcc_gpio, 0); > + > + return ret; > +} > + > +static int jdi_panel_enable(struct drm_panel *panel) > +{ > + struct jdi_panel *jdi = to_jdi_panel(panel); > + > + if (jdi->enabled) > + return 0; > + > + DRM_DEBUG("enable\n"); > + > + if (jdi->backlight) { > + jdi->backlight->props.power = FB_BLANK_UNBLANK; > + backlight_update_status(jdi->backlight); > + } > + > + jdi->enabled = true; > + > + return 0; > +} > + > +static const struct drm_display_mode default_mode = { > + .clock = 155000, > + .hdisplay = 1200, > + .hsync_start = 1200 + 48, > + .hsync_end = 1200 + 48 + 32, > + .htotal = 1200 + 48 + 32 + 60, > + .vdisplay = 1920, > + .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) > +{ > + 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); > + > + return 1; > +} > + > +static const struct drm_panel_funcs jdi_panel_funcs = { > + .disable = jdi_panel_disable, > + .unprepare = jdi_panel_unprepare, > + .prepare = jdi_panel_prepare, > + .enable = jdi_panel_enable, > + .get_modes = jdi_panel_get_modes, > +}; > + > +static const struct of_device_id jdi_of_match[] = { > + { .compatible = "jdi,lt070me05000", }, > + { } > +}; > +MODULE_DEVICE_TABLE(of, jdi_of_match); > + > +static int jdi_panel_add(struct jdi_panel *jdi) > +{ > + struct device *dev = &jdi->dsi->dev; > + int ret; > + > + jdi->mode = &default_mode; > + > + /* lvs5 */ > + jdi->supply = devm_regulator_get(dev, "power"); > + if (IS_ERR(jdi->supply)) > + return PTR_ERR(jdi->supply); > + > + /* l17 */ > + jdi->backlit = devm_regulator_get(dev, "backlit"); > + if (IS_ERR(jdi->supply)) > + return PTR_ERR(jdi->supply); > + > + jdi->lvs7 = devm_regulator_get(dev, "lvs7"); > + if (IS_ERR(jdi->lvs7)) > + return PTR_ERR(jdi->lvs7); > + > + jdi->avdd = devm_regulator_get(dev, "avdd"); > + if (IS_ERR(jdi->avdd)) > + return PTR_ERR(jdi->avdd); > + > + jdi->iovdd = devm_regulator_get(dev, "iovdd"); > + if (IS_ERR(jdi->iovdd)) > + return PTR_ERR(jdi->iovdd); > + > + jdi->vcc_gpio = devm_gpiod_get(dev, "vcc", GPIOD_OUT_LOW); > + if (IS_ERR(jdi->vcc_gpio)) { > + dev_err(dev, "cannot get vcc-gpio %ld\n", > + PTR_ERR(jdi->vcc_gpio)); > + jdi->vcc_gpio = NULL; > + } else { > + gpiod_direction_output(jdi->vcc_gpio, 0); > + } > + > + jdi->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); > + if (IS_ERR(jdi->reset_gpio)) { > + dev_err(dev, "cannot get reset-gpios %ld\n", > + PTR_ERR(jdi->reset_gpio)); > + jdi->reset_gpio = NULL; > + } else { > + gpiod_direction_output(jdi->reset_gpio, 0); > + } > + > + jdi->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW); > + if (IS_ERR(jdi->enable_gpio)) { > + dev_err(dev, "cannot get enable-gpio %ld\n", > + PTR_ERR(jdi->enable_gpio)); > + jdi->enable_gpio = NULL; > + } else { > + gpiod_direction_output(jdi->enable_gpio, 0); > + } > + > + jdi->pwm_gpio = devm_gpiod_get(dev, "pwm", GPIOD_OUT_LOW); > + if (IS_ERR(jdi->pwm_gpio)) { > + dev_err(dev, "cannot get pwm-gpio %ld\n", > + PTR_ERR(jdi->pwm_gpio)); > + jdi->pwm_gpio = NULL; > + } else { > + gpiod_direction_output(jdi->pwm_gpio, 0); > + } > + > + /* we don't have backlight right now, proceed further */ > +#ifdef BACKLIGHT > + np = of_parse_phandle(dev->of_node, "backlight", 0); > + if (np) { > + jdi->backlight = of_find_backlight_by_node(np); > + of_node_put(np); > + > + if (!jdi->backlight) > + return -EPROBE_DEFER; > + } > +#endif > + > + drm_panel_init(&jdi->base); > + jdi->base.funcs = &jdi_panel_funcs; > + jdi->base.dev = &jdi->dsi->dev; > + > + ret = drm_panel_add(&jdi->base); > + if (ret < 0) > + goto put_backlight; > + > + return 0; > + > +put_backlight: > + if (jdi->backlight) > + put_device(&jdi->backlight->dev); > + > + return ret; > +} > + > +static void jdi_panel_del(struct jdi_panel *jdi) > +{ > + if (jdi->base.dev) > + drm_panel_remove(&jdi->base); > + > + if (jdi->backlight) > + put_device(&jdi->backlight->dev); > +} > + > +static int jdi_panel_probe(struct mipi_dsi_device *dsi) > +{ > + struct jdi_panel *jdi; > + int ret; > + > + dsi->lanes = 4; > + dsi->format = MIPI_DSI_FMT_RGB888; > + dsi->mode_flags = MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_VIDEO | > + MIPI_DSI_MODE_VIDEO_HFP | MIPI_DSI_MODE_VIDEO_HBP | > + MIPI_DSI_MODE_VIDEO_HSA | > + MIPI_DSI_CLOCK_NON_CONTINUOUS; > + > + jdi = devm_kzalloc(&dsi->dev, sizeof(*jdi), GFP_KERNEL); > + if (!jdi) > + return -ENOMEM; > + > + mipi_dsi_set_drvdata(dsi, jdi); > + > + jdi->dsi = dsi; > + > + ret = jdi_panel_add(jdi); > + if (ret < 0) > + return ret; > + > + return mipi_dsi_attach(dsi); > +} > + > +static int 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); > + > + drm_panel_detach(&jdi->base); > + 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 = { > + .driver = { > + .name = "panel-jdi-lt070me05000", > + .of_match_table = jdi_of_match, > + }, > + .probe = jdi_panel_probe, > + .remove = jdi_panel_remove, > + .shutdown = jdi_panel_shutdown, > +}; > +module_mipi_dsi_driver(jdi_panel_driver); > + > +MODULE_AUTHOR("Sumit Semwal <sumit.semwal@xxxxxxxxxx>"); > +MODULE_AUTHOR("Vinay Simha BN <simhavcs@xxxxxxxxx>"); > +MODULE_DESCRIPTION("JDI WUXGA LT070ME05000 DSI video/command mode panel driver"); > +MODULE_LICENSE("GPL v2"); > -- > 2.1.2 > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
