[v3,2/2] drm/panel: Add driver for sitronix ST7789V LCD controller

Message ID	fb8ed97ce3e32b6d292fef4715cde188dff6a8a5.1491226701.git-series.maxime.ripard@free-electrons.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <dri-devel-bounces@lists.freedesktop.org> From: Maxime Ripard <maxime.ripard@free-electrons.com> To: Mark Rutland <mark.rutland@arm.com>, Rob Herring <robh+dt@kernel.org>, Thierry Reding <thierry.reding@gmail.com> Subject: [PATCH v3 2/2] drm/panel: Add driver for sitronix ST7789V LCD controller Date: Mon, 3 Apr 2017 15:38:32 +0200 Message-Id: <fb8ed97ce3e32b6d292fef4715cde188dff6a8a5.1491226701.git-series.maxime.ripard@free-electrons.com> In-Reply-To: <cover.74614dd427b0214d0ba7ccfe75bdd7506b42e61d.1491226701.git-series.maxime.ripard@free-electrons.com> References: <cover.74614dd427b0214d0ba7ccfe75bdd7506b42e61d.1491226701.git-series.maxime.ripard@free-electrons.com> In-Reply-To: <cover.74614dd427b0214d0ba7ccfe75bdd7506b42e61d.1491226701.git-series.maxime.ripard@free-electrons.com> References: <cover.74614dd427b0214d0ba7ccfe75bdd7506b42e61d.1491226701.git-series.maxime.ripard@free-electrons.com> Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Daniel Vetter <daniel.vetter@intel.com>, Maxime Ripard <maxime.ripard@free-electrons.com> Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" <dri-devel-bounces@lists.freedesktop.org>

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig index 62aba976e744..eb42dc37e979 100644 --- a/drivers/gpu/drm/panel/Kconfig +++ b/drivers/gpu/drm/panel/Kconfig @@ -81,4 +81,11 @@ config DRM_PANEL_SHARP_LS043T1LE01 Say Y here if you want to enable support for Sharp LS043T1LE01 qHD (540x960) DSI panel as found on the Qualcomm APQ8074 Dragonboard +config DRM_PANEL_SITRONIX_ST7789V + tristate "Sitronix ST7789V panel" + depends on OF && SPI + help + Say Y here if you want to enable support for the Sitronix + ST7789V controller for 240x320 LCD panels + endmenu diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile index a5c7ec0236e0..41b245d39984 100644 --- a/drivers/gpu/drm/panel/Makefile +++ b/drivers/gpu/drm/panel/Makefile @@ -6,3 +6,4 @@ 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_SITRONIX_ST7789V) += panel-sitronix-st7789v.o diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7789v.c b/drivers/gpu/drm/panel/panel-sitronix-st7789v.c new file mode 100644 index 000000000000..358c64ef1922 --- /dev/null +++ b/drivers/gpu/drm/panel/panel-sitronix-st7789v.c @@ -0,0 +1,449 @@ +/* + * Copyright (C) 2017 Free Electrons + * + * 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. + */ + +#include <linux/gpio/consumer.h> +#include <linux/regulator/consumer.h> +#include <linux/spi/spi.h> + +#include <drm/drmP.h> +#include <drm/drm_panel.h> + +#include <video/mipi_display.h> + +#define ST7789V_COLMOD_RGB_FMT_18BITS (6 << 4) +#define ST7789V_COLMOD_CTRL_FMT_18BITS (6 << 0) + +#define ST7789V_RAMCTRL_CMD 0xb0 +#define ST7789V_RAMCTRL_RM_RGB BIT(4) +#define ST7789V_RAMCTRL_DM_RGB BIT(0) +#define ST7789V_RAMCTRL_MAGIC (3 << 6) +#define ST7789V_RAMCTRL_EPF(n) (((n) & 3) << 4) + +#define ST7789V_RGBCTRL_CMD 0xb1 +#define ST7789V_RGBCTRL_WO BIT(7) +#define ST7789V_RGBCTRL_RCM(n) (((n) & 3) << 5) +#define ST7789V_RGBCTRL_VSYNC_HIGH BIT(3) +#define ST7789V_RGBCTRL_HSYNC_HIGH BIT(2) +#define ST7789V_RGBCTRL_PCLK_HIGH BIT(1) +#define ST7789V_RGBCTRL_VBP(n) ((n) & 0x7f) +#define ST7789V_RGBCTRL_HBP(n) ((n) & 0x1f) + +#define ST7789V_PORCTRL_CMD 0xb2 +#define ST7789V_PORCTRL_IDLE_BP(n) (((n) & 0xf) << 4) +#define ST7789V_PORCTRL_IDLE_FP(n) ((n) & 0xf) +#define ST7789V_PORCTRL_PARTIAL_BP(n) (((n) & 0xf) << 4) +#define ST7789V_PORCTRL_PARTIAL_FP(n) ((n) & 0xf) + +#define ST7789V_GCTRL_CMD 0xb7 +#define ST7789V_GCTRL_VGHS(n) (((n) & 7) << 4) +#define ST7789V_GCTRL_VGLS(n) ((n) & 7) + +#define ST7789V_VCOMS_CMD 0xbb + +#define ST7789V_LCMCTRL_CMD 0xc0 +#define ST7789V_LCMCTRL_XBGR BIT(5) +#define ST7789V_LCMCTRL_XMX BIT(3) +#define ST7789V_LCMCTRL_XMH BIT(2) + +#define ST7789V_VDVVRHEN_CMD 0xc2 +#define ST7789V_VDVVRHEN_CMDEN BIT(0) + +#define ST7789V_VRHS_CMD 0xc3 + +#define ST7789V_VDVS_CMD 0xc4 + +#define ST7789V_FRCTRL2_CMD 0xc6 + +#define ST7789V_PWCTRL1_CMD 0xd0 +#define ST7789V_PWCTRL1_MAGIC 0xa4 +#define ST7789V_PWCTRL1_AVDD(n) (((n) & 3) << 6) +#define ST7789V_PWCTRL1_AVCL(n) (((n) & 3) << 4) +#define ST7789V_PWCTRL1_VDS(n) ((n) & 3) + +#define ST7789V_PVGAMCTRL_CMD 0xe0 +#define ST7789V_PVGAMCTRL_JP0(n) (((n) & 3) << 4) +#define ST7789V_PVGAMCTRL_JP1(n) (((n) & 3) << 4) +#define ST7789V_PVGAMCTRL_VP0(n) ((n) & 0xf) +#define ST7789V_PVGAMCTRL_VP1(n) ((n) & 0x3f) +#define ST7789V_PVGAMCTRL_VP2(n) ((n) & 0x3f) +#define ST7789V_PVGAMCTRL_VP4(n) ((n) & 0x1f) +#define ST7789V_PVGAMCTRL_VP6(n) ((n) & 0x1f) +#define ST7789V_PVGAMCTRL_VP13(n) ((n) & 0xf) +#define ST7789V_PVGAMCTRL_VP20(n) ((n) & 0x7f) +#define ST7789V_PVGAMCTRL_VP27(n) ((n) & 7) +#define ST7789V_PVGAMCTRL_VP36(n) (((n) & 7) << 4) +#define ST7789V_PVGAMCTRL_VP43(n) ((n) & 0x7f) +#define ST7789V_PVGAMCTRL_VP50(n) ((n) & 0xf) +#define ST7789V_PVGAMCTRL_VP57(n) ((n) & 0x1f) +#define ST7789V_PVGAMCTRL_VP59(n) ((n) & 0x1f) +#define ST7789V_PVGAMCTRL_VP61(n) ((n) & 0x3f) +#define ST7789V_PVGAMCTRL_VP62(n) ((n) & 0x3f) +#define ST7789V_PVGAMCTRL_VP63(n) (((n) & 0xf) << 4) + +#define ST7789V_NVGAMCTRL_CMD 0xe1 +#define ST7789V_NVGAMCTRL_JN0(n) (((n) & 3) << 4) +#define ST7789V_NVGAMCTRL_JN1(n) (((n) & 3) << 4) +#define ST7789V_NVGAMCTRL_VN0(n) ((n) & 0xf) +#define ST7789V_NVGAMCTRL_VN1(n) ((n) & 0x3f) +#define ST7789V_NVGAMCTRL_VN2(n) ((n) & 0x3f) +#define ST7789V_NVGAMCTRL_VN4(n) ((n) & 0x1f) +#define ST7789V_NVGAMCTRL_VN6(n) ((n) & 0x1f) +#define ST7789V_NVGAMCTRL_VN13(n) ((n) & 0xf) +#define ST7789V_NVGAMCTRL_VN20(n) ((n) & 0x7f) +#define ST7789V_NVGAMCTRL_VN27(n) ((n) & 7) +#define ST7789V_NVGAMCTRL_VN36(n) (((n) & 7) << 4) +#define ST7789V_NVGAMCTRL_VN43(n) ((n) & 0x7f) +#define ST7789V_NVGAMCTRL_VN50(n) ((n) & 0xf) +#define ST7789V_NVGAMCTRL_VN57(n) ((n) & 0x1f) +#define ST7789V_NVGAMCTRL_VN59(n) ((n) & 0x1f) +#define ST7789V_NVGAMCTRL_VN61(n) ((n) & 0x3f) +#define ST7789V_NVGAMCTRL_VN62(n) ((n) & 0x3f) +#define ST7789V_NVGAMCTRL_VN63(n) (((n) & 0xf) << 4) + +#define ST7789V_TEST(val, func) \ + do { \ + if ((val = (func))) \ + return val; \ + } while (0) + +struct st7789v { + struct drm_panel panel; + struct spi_device *spi; + struct gpio_desc *reset; + struct backlight_device *backlight; + struct regulator *power; +}; + +enum st7789v_prefix { + ST7789V_COMMAND = 0, + ST7789V_DATA = 1, +}; + +static inline struct st7789v *panel_to_st7789v(struct drm_panel *panel) +{ + return container_of(panel, struct st7789v, panel); +} + +static int st7789v_spi_write(struct st7789v *ctx, enum st7789v_prefix prefix, + u8 data) +{ + struct spi_transfer xfer = { }; + struct spi_message msg; + u16 txbuf = ((prefix & 1) << 8) | data; + + spi_message_init(&msg); + + xfer.tx_buf = &txbuf; + xfer.bits_per_word = 9; + xfer.len = sizeof(txbuf); + + spi_message_add_tail(&xfer, &msg); + return spi_sync(ctx->spi, &msg); +} + +static int st7789v_write_command(struct st7789v *ctx, u8 cmd) +{ + return st7789v_spi_write(ctx, ST7789V_COMMAND, cmd); +} + +static int st7789v_write_data(struct st7789v *ctx, u8 cmd) +{ + return st7789v_spi_write(ctx, ST7789V_DATA, cmd); +} + +static const struct drm_display_mode default_mode = { + .clock = 7000, + .hdisplay = 240, + .hsync_start = 240 + 38, + .hsync_end = 240 + 38 + 10, + .htotal = 240 + 38 + 10 + 10, + .vdisplay = 320, + .vsync_start = 320 + 8, + .vsync_end = 320 + 8 + 4, + .vtotal = 320 + 8 + 4 + 4, + .vrefresh = 60, +}; + +static int st7789v_get_modes(struct drm_panel *panel) +{ + struct drm_connector *connector = panel->connector; + 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); + + mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; + drm_mode_probed_add(connector, mode); + + panel->connector->display_info.width_mm = 61; + panel->connector->display_info.height_mm = 103; + + return 1; +} + +static int st7789v_prepare(struct drm_panel *panel) +{ + struct st7789v *ctx = panel_to_st7789v(panel); + int ret; + + ret = regulator_enable(ctx->power); + if (ret) + return ret; + + gpiod_set_value(ctx->reset, 1); + msleep(30); + gpiod_set_value(ctx->reset, 0); + msleep(120); + + ST7789V_TEST(ret, st7789v_write_command(ctx, MIPI_DCS_EXIT_SLEEP_MODE)); + + /* We need to wait 120ms after a sleep out command */ + msleep(120); + + ST7789V_TEST(ret, st7789v_write_command(ctx, + MIPI_DCS_SET_ADDRESS_MODE)); + ST7789V_TEST(ret, st7789v_write_data(ctx, 0)); + + ST7789V_TEST(ret, st7789v_write_command(ctx, + MIPI_DCS_SET_PIXEL_FORMAT)); + ST7789V_TEST(ret, st7789v_write_data(ctx, + (MIPI_DCS_PIXEL_FMT_18BIT << 4) | + (MIPI_DCS_PIXEL_FMT_18BIT))); + + ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_PORCTRL_CMD)); + ST7789V_TEST(ret, st7789v_write_data(ctx, 0xc)); + ST7789V_TEST(ret, st7789v_write_data(ctx, 0xc)); + ST7789V_TEST(ret, st7789v_write_data(ctx, 0)); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PORCTRL_IDLE_BP(3) | + ST7789V_PORCTRL_IDLE_FP(3))); + ST7789V_TEST(ret, st7789v_write_data(ctx, + ST7789V_PORCTRL_PARTIAL_BP(3) | + ST7789V_PORCTRL_PARTIAL_FP(3))); + + ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_GCTRL_CMD)); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_GCTRL_VGLS(5) | + ST7789V_GCTRL_VGHS(3))); + + ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_VCOMS_CMD)); + ST7789V_TEST(ret, st7789v_write_data(ctx, 0x2b)); + + ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_LCMCTRL_CMD)); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_LCMCTRL_XMH | + ST7789V_LCMCTRL_XMX | + ST7789V_LCMCTRL_XBGR)); + + ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_VDVVRHEN_CMD)); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_VDVVRHEN_CMDEN)); + + ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_VRHS_CMD)); + ST7789V_TEST(ret, st7789v_write_data(ctx, 0xf)); + + ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_VDVS_CMD)); + ST7789V_TEST(ret, st7789v_write_data(ctx, 0x20)); + + ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_FRCTRL2_CMD)); + ST7789V_TEST(ret, st7789v_write_data(ctx, 0xf)); + + ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_PWCTRL1_CMD)); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PWCTRL1_MAGIC)); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PWCTRL1_AVDD(2) | + ST7789V_PWCTRL1_AVCL(2) | + ST7789V_PWCTRL1_VDS(1))); + + ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_PVGAMCTRL_CMD)); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP63(0xd))); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP1(0xca))); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP2(0xe))); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP4(8))); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP6(9))); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP13(7))); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP20(0x2d))); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP27(0xb) | + ST7789V_PVGAMCTRL_VP36(3))); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP43(0x3d))); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_JP1(3) | + ST7789V_PVGAMCTRL_VP50(4))); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP57(0xa))); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP59(0xa))); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP61(0x1b))); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP62(0x28))); + + ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_NVGAMCTRL_CMD)); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN63(0xd))); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN1(0xca))); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN2(0xf))); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN4(8))); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN6(8))); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN13(7))); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN20(0x2e))); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN27(0xc) | + ST7789V_NVGAMCTRL_VN36(5))); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN43(0x40))); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_JN1(3) | + ST7789V_NVGAMCTRL_VN50(4))); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN57(9))); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN59(0xb))); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN61(0x1b))); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN62(0x28))); + + ST7789V_TEST(ret, st7789v_write_command(ctx, MIPI_DCS_ENTER_INVERT_MODE)); + + ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_RAMCTRL_CMD)); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_RAMCTRL_DM_RGB | + ST7789V_RAMCTRL_RM_RGB)); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_RAMCTRL_EPF(3) | + ST7789V_RAMCTRL_MAGIC)); + + ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_RGBCTRL_CMD)); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_RGBCTRL_WO | + ST7789V_RGBCTRL_RCM(2) | + ST7789V_RGBCTRL_VSYNC_HIGH | + ST7789V_RGBCTRL_HSYNC_HIGH | + ST7789V_RGBCTRL_PCLK_HIGH)); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_RGBCTRL_VBP(8))); + ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_RGBCTRL_HBP(20))); + + return 0; +} + +static int st7789v_enable(struct drm_panel *panel) +{ + struct st7789v *ctx = panel_to_st7789v(panel); + + if (ctx->backlight) { + ctx->backlight->props.state &= ~BL_CORE_FBBLANK; + ctx->backlight->props.power = FB_BLANK_UNBLANK; + backlight_update_status(ctx->backlight); + } + + return st7789v_write_command(ctx, MIPI_DCS_SET_DISPLAY_ON); +} + +static int st7789v_disable(struct drm_panel *panel) +{ + struct st7789v *ctx = panel_to_st7789v(panel); + int ret; + + ST7789V_TEST(ret, st7789v_write_command(ctx, MIPI_DCS_SET_DISPLAY_OFF)); + + if (ctx->backlight) { + ctx->backlight->props.power = FB_BLANK_POWERDOWN; + ctx->backlight->props.state |= BL_CORE_FBBLANK; + backlight_update_status(ctx->backlight); + } + + return 0; +} + +static int st7789v_unprepare(struct drm_panel *panel) +{ + struct st7789v *ctx = panel_to_st7789v(panel); + int ret; + + ST7789V_TEST(ret, st7789v_write_command(ctx, MIPI_DCS_ENTER_SLEEP_MODE)); + + regulator_disable(ctx->power); + + return 0; +} + +static const struct drm_panel_funcs st7789v_drm_funcs = { + .disable = st7789v_disable, + .enable = st7789v_enable, + .get_modes = st7789v_get_modes, + .prepare = st7789v_prepare, + .unprepare = st7789v_unprepare, +}; + +static int st7789v_probe(struct spi_device *spi) +{ + struct device_node *backlight; + struct st7789v *ctx; + int ret; + + ctx = devm_kzalloc(&spi->dev, sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + spi_set_drvdata(spi, ctx); + ctx->spi = spi; + + ctx->panel.dev = &spi->dev; + ctx->panel.funcs = &st7789v_drm_funcs; + + ctx->power = devm_regulator_get(&spi->dev, "power"); + if (IS_ERR(ctx->power)) + return PTR_ERR(ctx->power); + + ctx->reset = devm_gpiod_get(&spi->dev, "reset", GPIOD_OUT_LOW); + if (IS_ERR(ctx->reset)) { + dev_err(&spi->dev, "Couldn't get our reset line\n"); + return PTR_ERR(ctx->reset); + } + + backlight = of_parse_phandle(spi->dev.of_node, "backlight", 0); + if (backlight) { + ctx->backlight = of_find_backlight_by_node(backlight); + of_node_put(backlight); + + if (!ctx->backlight) + return -EPROBE_DEFER; + } + + ret = drm_panel_add(&ctx->panel); + if (ret < 0) + goto err_free_backlight; + + return 0; + +err_free_backlight: + if (ctx->backlight) + put_device(&ctx->backlight->dev); + + return ret; +} + +static int st7789v_remove(struct spi_device *spi) +{ + struct st7789v *ctx = spi_get_drvdata(spi); + + drm_panel_detach(&ctx->panel); + drm_panel_remove(&ctx->panel); + + if (ctx->backlight) + put_device(&ctx->backlight->dev); + + return 0; +} + +static const struct of_device_id st7789v_of_match[] = { + { .compatible = "sitronix,st7789v" }, + { } +}; +MODULE_DEVICE_TABLE(of, st7789v_of_match); + +static struct spi_driver st7789v_driver = { + .probe = st7789v_probe, + .remove = st7789v_remove, + .driver = { + .name = "st7789v", + .of_match_table = st7789v_of_match, + }, +}; +module_spi_driver(st7789v_driver); + +MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>"); +MODULE_DESCRIPTION("Sitronix st7789v LCD Driver"); +MODULE_LICENSE("GPL v2");

[v3,2/2] drm/panel: Add driver for sitronix ST7789V LCD controller

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