[v2,08/10] drm/panel: Add Huarui LHR050H41 panel driver

Message ID	33efcb267bc513bb19551f1ffdcf578ebfb90369.1519204731.git-series.maxime.ripard@bootlin.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org> From: Maxime Ripard <maxime.ripard@bootlin.com> To: Mark Brown <broonie@kernel.org>, Thierry Reding <thierry.reding@gmail.com>, Chen-Yu Tsai <wens@csie.org>, Maxime Ripard <maxime.ripard@bootlin.com>, Mark Rutland <mark.rutland@arm.com>, Rob Herring <robh+dt@kernel.org> Subject: [PATCH v2 08/10] drm/panel: Add Huarui LHR050H41 panel driver Date: Wed, 21 Feb 2018 10:20:32 +0100 Message-Id: <33efcb267bc513bb19551f1ffdcf578ebfb90369.1519204731.git-series.maxime.ripard@bootlin.com> In-Reply-To: <cover.68c39205c8726547449e3df67b549d89380e51a2.1519204731.git-series.maxime.ripard@bootlin.com> References: <cover.68c39205c8726547449e3df67b549d89380e51a2.1519204731.git-series.maxime.ripard@bootlin.com> In-Reply-To: <cover.68c39205c8726547449e3df67b549d89380e51a2.1519204731.git-series.maxime.ripard@bootlin.com> References: <cover.68c39205c8726547449e3df67b549d89380e51a2.1519204731.git-series.maxime.ripard@bootlin.com> Precedence: list Cc: devicetree@vger.kernel.org, Gustavo Padovan <gustavo@padovan.org>, Maarten Lankhorst <maarten.lankhorst@linux.intel.com>, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Sean Paul <seanpaul@chromium.org>, Thomas Petazzoni <thomas.petazzoni@bootlin.com>, Daniel Vetter <daniel.vetter@intel.com>, Maxime Ripard <maxime.ripard@free-electrons.com>, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" <linux-arm-kernel-bounces@lists.infradead.org> Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig index 6ba4031f3919..965310fd129a 100644 --- a/drivers/gpu/drm/panel/Kconfig +++ b/drivers/gpu/drm/panel/Kconfig @@ -28,6 +28,15 @@ config DRM_PANEL_SIMPLE that it can be automatically turned off when the panel goes into a low power state. +config DRM_PANEL_HUARUI_LHR050H41 + tristate "Huarui LHR050H41 panel" + depends on OF + depends on DRM_MIPI_DSI + depends on BACKLIGHT_CLASS_DEVICE + help + Say Y if you want to enable support for the Huarui Lighting + LHR05041 DSI panel. The panel has a 1280x720 resolution. + config DRM_PANEL_ILITEK_IL9322 tristate "Ilitek ILI9322 320x240 QVGA panels" depends on OF && SPI diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile index 6d251ebc568c..0eda133d26bb 100644 --- a/drivers/gpu/drm/panel/Makefile +++ b/drivers/gpu/drm/panel/Makefile @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_DRM_PANEL_LVDS) += panel-lvds.o obj-$(CONFIG_DRM_PANEL_SIMPLE) += panel-simple.o +obj-$(CONFIG_DRM_PANEL_HUARUI_LHR050H41) += panel-huarui-lhr050h41.o obj-$(CONFIG_DRM_PANEL_ILITEK_IL9322) += panel-ilitek-ili9322.o obj-$(CONFIG_DRM_PANEL_INNOLUX_P079ZCA) += panel-innolux-p079zca.o obj-$(CONFIG_DRM_PANEL_JDI_LT070ME05000) += panel-jdi-lt070me05000.o diff --git a/drivers/gpu/drm/panel/panel-huarui-lhr050h41.c b/drivers/gpu/drm/panel/panel-huarui-lhr050h41.c new file mode 100644 index 000000000000..f73d484a695b --- /dev/null +++ b/drivers/gpu/drm/panel/panel-huarui-lhr050h41.c @@ -0,0 +1,506 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2017, Free Electrons + * Author: Maxime Ripard <maxime.ripard@free-electrons.com> + */ + +#include <linux/backlight.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/err.h> +#include <linux/errno.h> +#include <linux/fb.h> +#include <linux/kernel.h> +#include <linux/module.h> + +#include <linux/gpio/consumer.h> + +#include <drm/drm_mipi_dsi.h> +#include <drm/drm_modes.h> +#include <drm/drm_panel.h> + +#include <video/mipi_display.h> + +struct lhr050h41 { + struct drm_panel panel; + struct mipi_dsi_device *dsi; + + struct backlight_device *backlight; + struct gpio_desc *power; + struct gpio_desc *reset; +}; + +enum lhr050h41_op { + LHR050H41_SWITCH_PAGE, + LHR050H41_COMMAND, +}; + +struct lhr050h41_instr { + enum lhr050h41_op op; + + union arg { + struct cmd { + u8 cmd; + u8 data; + } cmd; + u8 page; + } arg; +}; + +#define LHR050H41_SWITCH_PAGE_INSTR(_page) \ + { \ + .op = LHR050H41_SWITCH_PAGE, \ + .arg = { \ + .page = (_page), \ + }, \ + } + +#define LHR050H41_COMMAND_INSTR(_cmd, _data) \ + { \ + .op = LHR050H41_COMMAND, \ + .arg = { \ + .cmd = { \ + .cmd = (_cmd), \ + .data = (_data), \ + }, \ + }, \ + } + +struct lhr050h41_instr lhr050h41_init[] = { + LHR050H41_SWITCH_PAGE_INSTR(3), + LHR050H41_COMMAND_INSTR(0x01, 0x00), + LHR050H41_COMMAND_INSTR(0x02, 0x00), + LHR050H41_COMMAND_INSTR(0x03, 0x73), + LHR050H41_COMMAND_INSTR(0x04, 0x03), + LHR050H41_COMMAND_INSTR(0x05, 0x00), + LHR050H41_COMMAND_INSTR(0x06, 0x06), + LHR050H41_COMMAND_INSTR(0x07, 0x06), + LHR050H41_COMMAND_INSTR(0x08, 0x00), + LHR050H41_COMMAND_INSTR(0x09, 0x18), + LHR050H41_COMMAND_INSTR(0x0a, 0x04), + LHR050H41_COMMAND_INSTR(0x0b, 0x00), + LHR050H41_COMMAND_INSTR(0x0c, 0x02), + LHR050H41_COMMAND_INSTR(0x0d, 0x03), + LHR050H41_COMMAND_INSTR(0x0e, 0x00), + LHR050H41_COMMAND_INSTR(0x0f, 0x25), + LHR050H41_COMMAND_INSTR(0x10, 0x25), + LHR050H41_COMMAND_INSTR(0x11, 0x00), + LHR050H41_COMMAND_INSTR(0x12, 0x00), + LHR050H41_COMMAND_INSTR(0x13, 0x00), + LHR050H41_COMMAND_INSTR(0x14, 0x00), + LHR050H41_COMMAND_INSTR(0x15, 0x00), + LHR050H41_COMMAND_INSTR(0x16, 0x0C), + LHR050H41_COMMAND_INSTR(0x17, 0x00), + LHR050H41_COMMAND_INSTR(0x18, 0x00), + LHR050H41_COMMAND_INSTR(0x19, 0x00), + LHR050H41_COMMAND_INSTR(0x1a, 0x00), + LHR050H41_COMMAND_INSTR(0x1b, 0x00), + LHR050H41_COMMAND_INSTR(0x1c, 0x00), + LHR050H41_COMMAND_INSTR(0x1d, 0x00), + LHR050H41_COMMAND_INSTR(0x1e, 0xC0), + LHR050H41_COMMAND_INSTR(0x1f, 0x80), + LHR050H41_COMMAND_INSTR(0x20, 0x04), + LHR050H41_COMMAND_INSTR(0x21, 0x01), + LHR050H41_COMMAND_INSTR(0x22, 0x00), + LHR050H41_COMMAND_INSTR(0x23, 0x00), + LHR050H41_COMMAND_INSTR(0x24, 0x00), + LHR050H41_COMMAND_INSTR(0x25, 0x00), + LHR050H41_COMMAND_INSTR(0x26, 0x00), + LHR050H41_COMMAND_INSTR(0x27, 0x00), + LHR050H41_COMMAND_INSTR(0x28, 0x33), + LHR050H41_COMMAND_INSTR(0x29, 0x03), + LHR050H41_COMMAND_INSTR(0x2a, 0x00), + LHR050H41_COMMAND_INSTR(0x2b, 0x00), + LHR050H41_COMMAND_INSTR(0x2c, 0x00), + LHR050H41_COMMAND_INSTR(0x2d, 0x00), + LHR050H41_COMMAND_INSTR(0x2e, 0x00), + LHR050H41_COMMAND_INSTR(0x2f, 0x00), + LHR050H41_COMMAND_INSTR(0x30, 0x00), + LHR050H41_COMMAND_INSTR(0x31, 0x00), + LHR050H41_COMMAND_INSTR(0x32, 0x00), + LHR050H41_COMMAND_INSTR(0x33, 0x00), + LHR050H41_COMMAND_INSTR(0x34, 0x04), + LHR050H41_COMMAND_INSTR(0x35, 0x00), + LHR050H41_COMMAND_INSTR(0x36, 0x00), + LHR050H41_COMMAND_INSTR(0x37, 0x00), + LHR050H41_COMMAND_INSTR(0x38, 0x3C), + LHR050H41_COMMAND_INSTR(0x39, 0x00), + LHR050H41_COMMAND_INSTR(0x3a, 0x00), + LHR050H41_COMMAND_INSTR(0x3b, 0x00), + LHR050H41_COMMAND_INSTR(0x3c, 0x00), + LHR050H41_COMMAND_INSTR(0x3d, 0x00), + LHR050H41_COMMAND_INSTR(0x3e, 0x00), + LHR050H41_COMMAND_INSTR(0x3f, 0x00), + LHR050H41_COMMAND_INSTR(0x40, 0x00), + LHR050H41_COMMAND_INSTR(0x41, 0x00), + LHR050H41_COMMAND_INSTR(0x42, 0x00), + LHR050H41_COMMAND_INSTR(0x43, 0x00), + LHR050H41_COMMAND_INSTR(0x44, 0x00), + LHR050H41_COMMAND_INSTR(0x50, 0x01), + LHR050H41_COMMAND_INSTR(0x51, 0x23), + LHR050H41_COMMAND_INSTR(0x52, 0x45), + LHR050H41_COMMAND_INSTR(0x53, 0x67), + LHR050H41_COMMAND_INSTR(0x54, 0x89), + LHR050H41_COMMAND_INSTR(0x55, 0xab), + LHR050H41_COMMAND_INSTR(0x56, 0x01), + LHR050H41_COMMAND_INSTR(0x57, 0x23), + LHR050H41_COMMAND_INSTR(0x58, 0x45), + LHR050H41_COMMAND_INSTR(0x59, 0x67), + LHR050H41_COMMAND_INSTR(0x5a, 0x89), + LHR050H41_COMMAND_INSTR(0x5b, 0xab), + LHR050H41_COMMAND_INSTR(0x5c, 0xcd), + LHR050H41_COMMAND_INSTR(0x5d, 0xef), + LHR050H41_COMMAND_INSTR(0x5e, 0x11), + LHR050H41_COMMAND_INSTR(0x5f, 0x02), + LHR050H41_COMMAND_INSTR(0x60, 0x02), + LHR050H41_COMMAND_INSTR(0x61, 0x02), + LHR050H41_COMMAND_INSTR(0x62, 0x02), + LHR050H41_COMMAND_INSTR(0x63, 0x02), + LHR050H41_COMMAND_INSTR(0x64, 0x02), + LHR050H41_COMMAND_INSTR(0x65, 0x02), + LHR050H41_COMMAND_INSTR(0x66, 0x02), + LHR050H41_COMMAND_INSTR(0x67, 0x02), + LHR050H41_COMMAND_INSTR(0x68, 0x02), + LHR050H41_COMMAND_INSTR(0x69, 0x02), + LHR050H41_COMMAND_INSTR(0x6a, 0x0C), + LHR050H41_COMMAND_INSTR(0x6b, 0x02), + LHR050H41_COMMAND_INSTR(0x6c, 0x0F), + LHR050H41_COMMAND_INSTR(0x6d, 0x0E), + LHR050H41_COMMAND_INSTR(0x6e, 0x0D), + LHR050H41_COMMAND_INSTR(0x6f, 0x06), + LHR050H41_COMMAND_INSTR(0x70, 0x07), + LHR050H41_COMMAND_INSTR(0x71, 0x02), + LHR050H41_COMMAND_INSTR(0x72, 0x02), + LHR050H41_COMMAND_INSTR(0x73, 0x02), + LHR050H41_COMMAND_INSTR(0x74, 0x02), + LHR050H41_COMMAND_INSTR(0x75, 0x02), + LHR050H41_COMMAND_INSTR(0x76, 0x02), + LHR050H41_COMMAND_INSTR(0x77, 0x02), + LHR050H41_COMMAND_INSTR(0x78, 0x02), + LHR050H41_COMMAND_INSTR(0x79, 0x02), + LHR050H41_COMMAND_INSTR(0x7a, 0x02), + LHR050H41_COMMAND_INSTR(0x7b, 0x02), + LHR050H41_COMMAND_INSTR(0x7c, 0x02), + LHR050H41_COMMAND_INSTR(0x7d, 0x02), + LHR050H41_COMMAND_INSTR(0x7e, 0x02), + LHR050H41_COMMAND_INSTR(0x7f, 0x02), + LHR050H41_COMMAND_INSTR(0x80, 0x0C), + LHR050H41_COMMAND_INSTR(0x81, 0x02), + LHR050H41_COMMAND_INSTR(0x82, 0x0F), + LHR050H41_COMMAND_INSTR(0x83, 0x0E), + LHR050H41_COMMAND_INSTR(0x84, 0x0D), + LHR050H41_COMMAND_INSTR(0x85, 0x06), + LHR050H41_COMMAND_INSTR(0x86, 0x07), + LHR050H41_COMMAND_INSTR(0x87, 0x02), + LHR050H41_COMMAND_INSTR(0x88, 0x02), + LHR050H41_COMMAND_INSTR(0x89, 0x02), + LHR050H41_COMMAND_INSTR(0x8A, 0x02), + LHR050H41_SWITCH_PAGE_INSTR(4), + LHR050H41_COMMAND_INSTR(0x6C, 0x15), + LHR050H41_COMMAND_INSTR(0x6E, 0x22), + LHR050H41_COMMAND_INSTR(0x6F, 0x33), + LHR050H41_COMMAND_INSTR(0x3A, 0xA4), + LHR050H41_COMMAND_INSTR(0x8D, 0x0D), + LHR050H41_COMMAND_INSTR(0x87, 0xBA), + LHR050H41_COMMAND_INSTR(0x26, 0x76), + LHR050H41_COMMAND_INSTR(0xB2, 0xD1), + LHR050H41_SWITCH_PAGE_INSTR(1), + LHR050H41_COMMAND_INSTR(0x22, 0x0A), + LHR050H41_COMMAND_INSTR(0x53, 0xDC), + LHR050H41_COMMAND_INSTR(0x55, 0xA7), + LHR050H41_COMMAND_INSTR(0x50, 0x78), + LHR050H41_COMMAND_INSTR(0x51, 0x78), + LHR050H41_COMMAND_INSTR(0x31, 0x02), + LHR050H41_COMMAND_INSTR(0x60, 0x14), + LHR050H41_COMMAND_INSTR(0xA0, 0x2A), + LHR050H41_COMMAND_INSTR(0xA1, 0x39), + LHR050H41_COMMAND_INSTR(0xA2, 0x46), + LHR050H41_COMMAND_INSTR(0xA3, 0x0e), + LHR050H41_COMMAND_INSTR(0xA4, 0x12), + LHR050H41_COMMAND_INSTR(0xA5, 0x25), + LHR050H41_COMMAND_INSTR(0xA6, 0x19), + LHR050H41_COMMAND_INSTR(0xA7, 0x1d), + LHR050H41_COMMAND_INSTR(0xA8, 0xa6), + LHR050H41_COMMAND_INSTR(0xA9, 0x1C), + LHR050H41_COMMAND_INSTR(0xAA, 0x29), + LHR050H41_COMMAND_INSTR(0xAB, 0x85), + LHR050H41_COMMAND_INSTR(0xAC, 0x1C), + LHR050H41_COMMAND_INSTR(0xAD, 0x1B), + LHR050H41_COMMAND_INSTR(0xAE, 0x51), + LHR050H41_COMMAND_INSTR(0xAF, 0x22), + LHR050H41_COMMAND_INSTR(0xB0, 0x2d), + LHR050H41_COMMAND_INSTR(0xB1, 0x4f), + LHR050H41_COMMAND_INSTR(0xB2, 0x59), + LHR050H41_COMMAND_INSTR(0xB3, 0x3F), + LHR050H41_COMMAND_INSTR(0xC0, 0x2A), + LHR050H41_COMMAND_INSTR(0xC1, 0x3a), + LHR050H41_COMMAND_INSTR(0xC2, 0x45), + LHR050H41_COMMAND_INSTR(0xC3, 0x0e), + LHR050H41_COMMAND_INSTR(0xC4, 0x11), + LHR050H41_COMMAND_INSTR(0xC5, 0x24), + LHR050H41_COMMAND_INSTR(0xC6, 0x1a), + LHR050H41_COMMAND_INSTR(0xC7, 0x1c), + LHR050H41_COMMAND_INSTR(0xC8, 0xaa), + LHR050H41_COMMAND_INSTR(0xC9, 0x1C), + LHR050H41_COMMAND_INSTR(0xCA, 0x29), + LHR050H41_COMMAND_INSTR(0xCB, 0x96), + LHR050H41_COMMAND_INSTR(0xCC, 0x1C), + LHR050H41_COMMAND_INSTR(0xCD, 0x1B), + LHR050H41_COMMAND_INSTR(0xCE, 0x51), + LHR050H41_COMMAND_INSTR(0xCF, 0x22), + LHR050H41_COMMAND_INSTR(0xD0, 0x2b), + LHR050H41_COMMAND_INSTR(0xD1, 0x4b), + LHR050H41_COMMAND_INSTR(0xD2, 0x59), + LHR050H41_COMMAND_INSTR(0xD3, 0x3F), +}; + +static inline struct lhr050h41 *panel_to_lhr050h41(struct drm_panel *panel) +{ + return container_of(panel, struct lhr050h41, panel); +} + +static int lhr050h41_switch_page(struct lhr050h41 *ctx, u8 page) +{ + u8 buf[4] = { 0xff, 0x98, 0x81, page }; + int ret; + + ret = mipi_dsi_dcs_write_buffer(ctx->dsi, buf, sizeof(buf)); + if (ret < 0) + return ret; + + return 0; +} + +static int lhr050h41_send_cmd_data(struct lhr050h41 *ctx, u8 cmd, u8 data) +{ + u8 buf[2] = { cmd, data }; + int ret; + + ret = mipi_dsi_dcs_write_buffer(ctx->dsi, buf, sizeof(buf)); + if (ret < 0) + return ret; + + return 0; +} + +static int lhr050h41_prepare(struct drm_panel *panel) +{ + struct lhr050h41 *ctx = panel_to_lhr050h41(panel); + int i, ret; + + /* Power the panel */ + gpiod_set_value(ctx->power, 1); + mdelay(5); + + /* And reset it */ + gpiod_set_value(ctx->reset, 1); + mdelay(20); + + gpiod_set_value(ctx->reset, 0); + mdelay(20); + + for (i = 0; i < ARRAY_SIZE(lhr050h41_init); i++) { + struct lhr050h41_instr *instr = &lhr050h41_init[i]; + + if (instr->op == LHR050H41_SWITCH_PAGE) + ret = lhr050h41_switch_page(ctx, instr->arg.page); + else if (instr->op == LHR050H41_COMMAND) + ret = lhr050h41_send_cmd_data(ctx, instr->arg.cmd.cmd, + instr->arg.cmd.data); + + if (ret) + return ret; + } + + ret = lhr050h41_switch_page(ctx, 0); + if (ret) + return ret; + + ret = mipi_dsi_dcs_set_tear_on(ctx->dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK); + if (ret) + return ret; + + mipi_dsi_dcs_exit_sleep_mode(ctx->dsi); + if (ret) + return ret; + + return 0; +} + +static void lhr050h41_enable_bl(struct lhr050h41 *ctx, bool enable) +{ + if (!ctx->backlight) + return; + + if (enable) { + ctx->backlight->props.state &= ~BL_CORE_FBBLANK; + ctx->backlight->props.power = FB_BLANK_UNBLANK; + } else { + ctx->backlight->props.power = FB_BLANK_POWERDOWN; + ctx->backlight->props.state |= BL_CORE_FBBLANK; + } + + backlight_update_status(ctx->backlight); +} + +static int lhr050h41_enable(struct drm_panel *panel) +{ + struct lhr050h41 *ctx = panel_to_lhr050h41(panel); + + mdelay(120); + + mipi_dsi_dcs_set_display_on(ctx->dsi); + + lhr050h41_enable_bl(ctx, true); + + return 0; +} + +static int lhr050h41_disable(struct drm_panel *panel) +{ + struct lhr050h41 *ctx = panel_to_lhr050h41(panel); + + lhr050h41_enable_bl(ctx, false); + + return mipi_dsi_dcs_set_display_off(ctx->dsi); +} + +static int lhr050h41_unprepare(struct drm_panel *panel) +{ + struct lhr050h41 *ctx = panel_to_lhr050h41(panel); + + mipi_dsi_dcs_enter_sleep_mode(ctx->dsi); + gpiod_set_value(ctx->power, 0); + gpiod_set_value(ctx->reset, 1); + + return 0; +} + +static const struct drm_display_mode default_mode = { + .clock = 62000, + .vrefresh = 60, + + .hdisplay = 720, + .hsync_start = 720 + 10, + .hsync_end = 720 + 10 + 20, + .htotal = 720 + 10 + 20 + 30, + + .vdisplay = 1280, + .vsync_start = 1280 + 10, + .vsync_end = 1280 + 10 + 10, + .vtotal = 1280 + 10 + 10 + 20, +}; + +static int lhr050h41_get_modes(struct drm_panel *panel) +{ + struct drm_connector *connector = panel->connector; + struct lhr050h41 *ctx = panel_to_lhr050h41(panel); + struct drm_display_mode *mode; + + mode = drm_mode_duplicate(panel->drm, &default_mode); + if (!mode) { + dev_err(&ctx->dsi->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); + + mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; + drm_mode_probed_add(connector, mode); + + panel->connector->display_info.width_mm = 62; + panel->connector->display_info.height_mm = 110; + + return 1; +} + +static const struct drm_panel_funcs lhr050h41_funcs = { + .prepare = lhr050h41_prepare, + .unprepare = lhr050h41_unprepare, + .enable = lhr050h41_enable, + .disable = lhr050h41_disable, + .get_modes = lhr050h41_get_modes, +}; + +static int lhr050h41_dsi_probe(struct mipi_dsi_device *dsi) +{ + struct device_node *np; + struct lhr050h41 *ctx; + int ret; + + ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + mipi_dsi_set_drvdata(dsi, ctx); + ctx->dsi = dsi; + + drm_panel_init(&ctx->panel); + ctx->panel.dev = &dsi->dev; + ctx->panel.funcs = &lhr050h41_funcs; + + ctx->power = devm_gpiod_get(&dsi->dev, "power", GPIOD_OUT_LOW); + if (IS_ERR(ctx->power)) { + dev_err(&dsi->dev, "Couldn't get our power GPIO\n"); + return PTR_ERR(ctx->power); + } + + ctx->reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW); + if (IS_ERR(ctx->reset)) { + dev_err(&dsi->dev, "Couldn't get our reset GPIO\n"); + return PTR_ERR(ctx->reset); + } + + np = of_parse_phandle(dsi->dev.of_node, "backlight", 0); + if (np) { + ctx->backlight = of_find_backlight_by_node(np); + of_node_put(np); + + if (!ctx->backlight) + return -EPROBE_DEFER; + } + + ret = drm_panel_add(&ctx->panel); + if (ret < 0) + return ret; + + dsi->mode_flags = MIPI_DSI_MODE_VIDEO_SYNC_PULSE; + dsi->format = MIPI_DSI_FMT_RGB888; + dsi->lanes = 4; + + return mipi_dsi_attach(dsi); +} + +static int lhr050h41_dsi_remove(struct mipi_dsi_device *dsi) +{ + struct lhr050h41 *ctx = mipi_dsi_get_drvdata(dsi); + + mipi_dsi_detach(dsi); + drm_panel_remove(&ctx->panel); + + if (ctx->backlight) + put_device(&ctx->backlight->dev); + + return 0; +} + +static const struct of_device_id lhr050h41_of_match[] = { + { .compatible = "huarui,lhr050h41" }, + { } +}; +MODULE_DEVICE_TABLE(of, lhr050h41_of_match); + +static struct mipi_dsi_driver lhr050h41_dsi_driver = { + .probe = lhr050h41_dsi_probe, + .remove = lhr050h41_dsi_remove, + .driver = { + .name = "lhr050h41-dsi", + .of_match_table = lhr050h41_of_match, + }, +}; +module_mipi_dsi_driver(lhr050h41_dsi_driver); + +MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>"); +MODULE_DESCRIPTION("Huarui LHR050H41 LCD Driver"); +MODULE_LICENSE("GPL v2");

[v2,08/10] drm/panel: Add Huarui LHR050H41 panel driver

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