From patchwork Wed Sep 9 07:56:48 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lubomir Rintel X-Patchwork-Id: 11766867 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 109C2698 for ; Thu, 10 Sep 2020 07:23:01 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E507B2078B for ; Thu, 10 Sep 2020 07:23:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E507B2078B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=v3.sk Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D78246E214; Thu, 10 Sep 2020 07:22:27 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from shell.v3.sk (mail.v3.sk [167.172.186.51]) by gabe.freedesktop.org (Postfix) with ESMTPS id BDB066E23B for ; Wed, 9 Sep 2020 07:56:54 +0000 (UTC) Received: from localhost (localhost.localdomain [127.0.0.1]) by zimbra.v3.sk (Postfix) with ESMTP id 23933DF930; Wed, 9 Sep 2020 07:55:35 +0000 (UTC) Received: from shell.v3.sk ([127.0.0.1]) by localhost (zimbra.v3.sk [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id wWl66GxIz-h2; Wed, 9 Sep 2020 07:55:34 +0000 (UTC) Received: from localhost (localhost.localdomain [127.0.0.1]) by zimbra.v3.sk (Postfix) with ESMTP id 41254DF974; Wed, 9 Sep 2020 07:55:34 +0000 (UTC) X-Virus-Scanned: amavisd-new at zimbra.v3.sk Received: from shell.v3.sk ([127.0.0.1]) by localhost (zimbra.v3.sk [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id eY-Om9O-9_Lx; Wed, 9 Sep 2020 07:55:34 +0000 (UTC) Received: from localhost (unknown [109.183.109.54]) by zimbra.v3.sk (Postfix) with ESMTPSA id EA5EDDF930; Wed, 9 Sep 2020 07:55:33 +0000 (UTC) From: Lubomir Rintel To: Andrzej Hajda Subject: [PATCH v5 1/2] dt-bindings: display: himax, hx8837: Add Himax HX8837 bindings Date: Wed, 9 Sep 2020 09:56:48 +0200 Message-Id: <20200909075649.1100300-2-lkundrak@v3.sk> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200909075649.1100300-1-lkundrak@v3.sk> References: <20200909075649.1100300-1-lkundrak@v3.sk> MIME-Version: 1.0 X-Mailman-Approved-At: Thu, 10 Sep 2020 07:22:25 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Jernej Skrabec , Jonas Karlman , David Airlie , Neil Armstrong , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Lubomir Rintel , Rob Herring , Laurent Pinchart Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Himax HX8837 is a secondary display controller used to drive the panel on OLPC platforms. Signed-off-by: Lubomir Rintel Reviewed-by: Rob Herring --- Changes since v4: - Rob's Reviewed-by Changes since v3: - Moved to bindings/display/ - Added the ports - Converted to YAML - Removed Pavel's Ack, because the changes are substantial Changes since v2: - s/betweend/between/ Changes since v1: - s/load-gpio/load-gpios/ - Use interrupt bindings instead of gpio for the IRQ .../bindings/display/bridge/himax,hx8837.yaml | 96 +++++++++++++++++++ 1 file changed, 96 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/bridge/himax,hx8837.yaml diff --git a/Documentation/devicetree/bindings/display/bridge/himax,hx8837.yaml b/Documentation/devicetree/bindings/display/bridge/himax,hx8837.yaml new file mode 100644 index 0000000000000..f5b0a00f5089d --- /dev/null +++ b/Documentation/devicetree/bindings/display/bridge/himax,hx8837.yaml @@ -0,0 +1,96 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +# Copyright (C) 2018,2019,2020 Lubomir Rintel +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/display/bridge/himax,hx8837.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: HX8837 Display Controller Device Tree Bindings + +maintainers: + - Lubomir Rintel + +properties: + compatible: + const: himax,hx8837 + + reg: + const: 0xd + + load-gpios: + maxItems: 1 + description: GPIO specifier of DCON_LOAD pin (active high) + + stat-gpios: + minItems: 2 + description: GPIO specifier of DCON_STAT0 and DCON_STAT1 pins (active high) + + interrupts: + maxItems: 1 + description: Interrupt specifier of DCON_IRQ pin (edge falling) + + ports: + type: object + + properties: + port@0: + type: object + description: | + Video port for RGB input. + + port@1: + type: object + description: | + Video port connected to the panel. + + required: + - port@0 + - port@1 + +required: + - compatible + - reg + - load-gpios + - stat-gpios + - interrupts + - ports + +additionalProperties: false + +examples: + - | + #include + #include + + i2c { + #address-cells = <1>; + #size-cells = <0>; + + lcd-controller@d { + compatible = "himax,hx8837"; + reg = <0x0d>; + stat-gpios = <&gpio 100 GPIO_ACTIVE_HIGH>, + <&gpio 101 GPIO_ACTIVE_HIGH>; + load-gpios = <&gpio 142 GPIO_ACTIVE_HIGH>; + interrupts = <&gpio 124 IRQ_TYPE_EDGE_FALLING>; + + ports { + #address-cells = <0x01>; + #size-cells = <0x00>; + + port@0 { + reg = <0x00>; + dcon_rgb_in: endpoint { + remote-endpoint = <&lcd0_rgb_out>; + }; + }; + + port@1 { + reg = <0x01>; + dcon_gettl_out: endpoint { + remote-endpoint = <&panel_dettl_in>; + }; + }; + }; + }; + }; From patchwork Wed Sep 9 07:56:49 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lubomir Rintel X-Patchwork-Id: 11766855 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D9F84618 for ; Thu, 10 Sep 2020 07:22:37 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id BBCBE2078B for ; Thu, 10 Sep 2020 07:22:37 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BBCBE2078B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=v3.sk Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id AB52189F9F; Thu, 10 Sep 2020 07:22:26 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from shell.v3.sk (mail.v3.sk [167.172.186.51]) by gabe.freedesktop.org (Postfix) with ESMTPS id BF5BC6E8EC for ; Wed, 9 Sep 2020 07:56:54 +0000 (UTC) Received: from localhost (localhost.localdomain [127.0.0.1]) by zimbra.v3.sk (Postfix) with ESMTP id D393FDF974; Wed, 9 Sep 2020 07:55:35 +0000 (UTC) Received: from shell.v3.sk ([127.0.0.1]) by localhost (zimbra.v3.sk [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id HU6uqnTmRYRh; Wed, 9 Sep 2020 07:55:34 +0000 (UTC) Received: from localhost (localhost.localdomain [127.0.0.1]) by zimbra.v3.sk (Postfix) with ESMTP id BB7AADF9D7; Wed, 9 Sep 2020 07:55:34 +0000 (UTC) X-Virus-Scanned: amavisd-new at zimbra.v3.sk Received: from shell.v3.sk ([127.0.0.1]) by localhost (zimbra.v3.sk [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id M5HM21kO43rh; Wed, 9 Sep 2020 07:55:34 +0000 (UTC) Received: from localhost (unknown [109.183.109.54]) by zimbra.v3.sk (Postfix) with ESMTPSA id 6E6BFDF930; Wed, 9 Sep 2020 07:55:34 +0000 (UTC) From: Lubomir Rintel To: Andrzej Hajda Subject: [PATCH v5 2/2] drm/bridge: hx8837: add a Himax HX8837 display controller driver Date: Wed, 9 Sep 2020 09:56:49 +0200 Message-Id: <20200909075649.1100300-3-lkundrak@v3.sk> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200909075649.1100300-1-lkundrak@v3.sk> References: <20200909075649.1100300-1-lkundrak@v3.sk> MIME-Version: 1.0 X-Mailman-Approved-At: Thu, 10 Sep 2020 07:22:25 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Jernej Skrabec , Jonas Karlman , David Airlie , Neil Armstrong , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Lubomir Rintel , Rob Herring , Laurent Pinchart Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Himax HX8837 is used to drive the LCD panel on OLPC platforms. It controls the panel backlight and is able to refresh it when the LCD controller (and the rest of the plaform) is powered off. It also converts regular RGB color data from the LCDC so that it looks reasonable on the OLPC LCD panel with a monochromatic layer on top of a layer that can either reflect light (b/w sunlight readable mode) or light pattern of red, green and blue pixels. At this point, the driver is rather basic. The self-refresh mode is not supported. There's no way of independently controlling the color swizzling, antialiasing or b/w conversion, but it probably isn't too useful either. There's another driver for the same hardware on OLPC XO-1.5 and XO-1.75 in drivers/staging/olpc_dcon. The display on that hardware doesn't utilize DRM, so this driver doesn't replace the other one yet. Signed-off-by: Lubomir Rintel --- Changes since v3: - Added this patch, in place of a driver derived from drivers/staging/olpc_dcon. Compared to the previous one this implements the bare minimum, without the fancy stuff such as self-refresh that need more work/thinking. drivers/gpu/drm/bridge/Kconfig | 13 ++ drivers/gpu/drm/bridge/Makefile | 1 + drivers/gpu/drm/bridge/himax-hx8837.c | 325 ++++++++++++++++++++++++++ 3 files changed, 339 insertions(+) create mode 100644 drivers/gpu/drm/bridge/himax-hx8837.c diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig index 43271c21d3fce..df30d61c3fee1 100644 --- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -48,6 +48,19 @@ config DRM_DISPLAY_CONNECTOR on ARM-based platforms. Saying Y here when this driver is not needed will not cause any issue. +config DRM_HIMAX_HX8837 + tristate "HiMax HX8837 OLPC Display Controller" + depends on OF + depends on OLPC || ARCH_MMP || COMPILE_TEST + select DRM_KMS_HELPER + select BACKLIGHT_LCD_SUPPORT + select BACKLIGHT_CLASS_DEVICE + help + Enable support for HiMax HX8837 Display Controller as found in the + OLPC XO laptops. + + If your laptop doesn't have green ears, say "N" + config DRM_LVDS_CODEC tristate "Transparent LVDS encoders and decoders support" depends on OF diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile index d63d4b7e43473..70d97c84382d5 100644 --- a/drivers/gpu/drm/bridge/Makefile +++ b/drivers/gpu/drm/bridge/Makefile @@ -2,6 +2,7 @@ obj-$(CONFIG_DRM_CDNS_DSI) += cdns-dsi.o obj-$(CONFIG_DRM_CHRONTEL_CH7033) += chrontel-ch7033.o obj-$(CONFIG_DRM_DISPLAY_CONNECTOR) += display-connector.o +obj-$(CONFIG_DRM_HIMAX_HX8837) += himax-hx8837.o obj-$(CONFIG_DRM_LVDS_CODEC) += lvds-codec.o obj-$(CONFIG_DRM_MEGACHIPS_STDPXXXX_GE_B850V3_FW) += megachips-stdpxxxx-ge-b850v3-fw.o obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o diff --git a/drivers/gpu/drm/bridge/himax-hx8837.c b/drivers/gpu/drm/bridge/himax-hx8837.c new file mode 100644 index 0000000000000..1e97fcb8ce505 --- /dev/null +++ b/drivers/gpu/drm/bridge/himax-hx8837.c @@ -0,0 +1,325 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * HiMax HX8837 Display Controller Driver + * + * Datasheet: http://wiki.laptop.org/images/0/09/DCON_datasheet_HX8837-A.pdf + * + * Copyright (C) 2020 Lubomir Rintel + */ + +#include +#include +#include + +#include +#include +#include +#include +#include +#include + +#define bridge_to_hx8837_priv(x) \ + container_of(x, struct hx8837_priv, bridge) + +/* DCON registers */ +enum { + DCON_REG_ID = 0x00, + DCON_REG_MODE = 0x01, + DCON_REG_HRES = 0x02, + DCON_REG_HTOTAL = 0x03, + DCON_REG_HSYNC_WIDTH = 0x04, + DCON_REG_VRES = 0x05, + DCON_REG_VTOTAL = 0x06, + DCON_REG_VSYNC_WIDTH = 0x07, + DCON_REG_TIMEOUT = 0x08, + DCON_REG_SCAN_INT = 0x09, + DCON_REG_BRIGHT = 0x0a, + DCON_REG_MEM_OPT_A = 0x41, + DCON_REG_MEM_OPT_B = 0x42, +}; + +/* DCON_REG_MODE */ +enum { + MODE_PASSTHRU = BIT(0), + MODE_SLEEP = BIT(1), + MODE_SLEEP_AUTO = BIT(2), + MODE_BL_ENABLE = BIT(3), + MODE_BLANK = BIT(4), + MODE_CSWIZZLE = BIT(5), + MODE_COL_AA = BIT(6), + MODE_MONO_LUMA = BIT(7), + MODE_SCAN_INT = BIT(8), + MODE_CLOCKDIV = BIT(9), + MODE_DEBUG = BIT(14), + MODE_SELFTEST = BIT(15), +}; + +struct hx8837_priv { + struct regmap *regmap; + struct gpio_desc *load_gpio; + + struct drm_bridge *panel_bridge; + struct drm_panel *panel; + struct drm_bridge bridge; +}; + +static int hx8837_bridge_attach(struct drm_bridge *bridge, + enum drm_bridge_attach_flags flags) +{ + struct hx8837_priv *priv = bridge_to_hx8837_priv(bridge); + + return drm_bridge_attach(bridge->encoder, priv->panel_bridge, + bridge, flags); +} + +static enum drm_mode_status hx8837_bridge_mode_valid( + struct drm_bridge *bridge, + const struct drm_display_info *info, + const struct drm_display_mode *mode) +{ + if (mode->hdisplay > 0xffff) + return MODE_BAD_HVALUE; + if (mode->htotal > 0xffff) + return MODE_BAD_HVALUE; + if (mode->hsync_start - mode->hdisplay > 0xff) + return MODE_HBLANK_WIDE; + if (mode->hsync_end - mode->hsync_start > 0xff) + return MODE_HSYNC_WIDE; + if (mode->vdisplay > 0xffff) + return MODE_BAD_VVALUE; + if (mode->vtotal > 0xffff) + return MODE_BAD_VVALUE; + if (mode->vsync_start - mode->vdisplay > 0xff) + return MODE_VBLANK_WIDE; + if (mode->vsync_end - mode->vsync_start > 0xff) + return MODE_VSYNC_WIDE; + + return MODE_OK; +} + +static void hx8837_bridge_disable(struct drm_bridge *bridge) +{ + struct hx8837_priv *priv = bridge_to_hx8837_priv(bridge); + int ret; + + ret = gpiod_direction_output(priv->load_gpio, 0); + if (ret) + DRM_ERROR("error enabling the dcon load: %d\n", ret); + + ret = regmap_update_bits(priv->regmap, DCON_REG_MODE, + MODE_PASSTHRU | + MODE_SLEEP, + MODE_PASSTHRU | + MODE_SLEEP); + if (ret) + DRM_ERROR("error disabling the dcon: %d\n", ret); +} + +static void hx8837_bridge_enable(struct drm_bridge *bridge) +{ + struct hx8837_priv *priv = bridge_to_hx8837_priv(bridge); + int ret; + + ret = regmap_update_bits(priv->regmap, DCON_REG_MODE, + MODE_PASSTHRU | + MODE_SLEEP | + MODE_SLEEP_AUTO | + MODE_BLANK | + MODE_SCAN_INT | + MODE_CLOCKDIV | + MODE_DEBUG | + MODE_SELFTEST, + MODE_PASSTHRU); + if (ret) + DRM_ERROR("error enabling the dcon: %d\n", ret); + + ret = gpiod_direction_output(priv->load_gpio, 1); + if (ret) + DRM_ERROR("error enabling the dcon load: %d\n", ret); +} + +static void hx8837_bridge_mode_set(struct drm_bridge *bridge, + const struct drm_display_mode *mode, + const struct drm_display_mode *adjusted_mode) +{ + struct hx8837_priv *priv = bridge_to_hx8837_priv(bridge); + + regmap_write(priv->regmap, DCON_REG_HRES, mode->hdisplay); + regmap_write(priv->regmap, DCON_REG_HTOTAL, mode->htotal); + regmap_write(priv->regmap, DCON_REG_HSYNC_WIDTH, + (mode->hsync_start - mode->hdisplay) << 8 | + (mode->hsync_end - mode->hsync_start)); + regmap_write(priv->regmap, DCON_REG_VRES, mode->vdisplay); + regmap_write(priv->regmap, DCON_REG_VTOTAL, mode->vtotal); + regmap_write(priv->regmap, DCON_REG_VSYNC_WIDTH, + (mode->vsync_start - mode->vdisplay) << 8 | + (mode->vsync_end - mode->vsync_start)); +} + +static const struct drm_bridge_funcs hx8837_bridge_funcs = { + .attach = hx8837_bridge_attach, + .mode_valid = hx8837_bridge_mode_valid, + .disable = hx8837_bridge_disable, + .enable = hx8837_bridge_enable, + .mode_set = hx8837_bridge_mode_set, +}; + +static int hx8837_bl_update_status(struct backlight_device *bl) +{ + struct hx8837_priv *priv = bl_get_data(bl); + unsigned int val; + int ret; + + ret = regmap_update_bits(priv->regmap, DCON_REG_BRIGHT, + 0x000f, + bl->props.brightness); + if (ret) { + dev_err(&bl->dev, "error setting the backlight: %d\n", ret); + return ret; + } + + if (bl->props.brightness) + val = MODE_CSWIZZLE | MODE_COL_AA; + else + val = MODE_MONO_LUMA; + + ret = regmap_update_bits(priv->regmap, DCON_REG_MODE, + MODE_CSWIZZLE | + MODE_COL_AA | + MODE_MONO_LUMA, + val); + if (ret) { + dev_err(&bl->dev, "error setting color mode: %d\n", ret); + return ret; + } + + return 0; +} + +static const struct backlight_ops hx8837_bl_ops = { + .update_status = hx8837_bl_update_status, +}; + +static const struct regmap_config hx8837_regmap_config = { + .reg_bits = 8, + .val_bits = 16, + .max_register = 0x4c, + .val_format_endian = REGMAP_ENDIAN_LITTLE, +}; + +static int hx8837_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct backlight_properties bl_props = { + .type = BACKLIGHT_RAW, + .max_brightness = 0xf, + }; + struct device *dev = &client->dev; + struct backlight_device *bl; + struct hx8837_priv *priv; + unsigned int val; + int ret; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + dev_set_drvdata(dev, priv); + + priv->load_gpio = devm_gpiod_get(dev, "load", GPIOD_ASIS); + if (IS_ERR(priv->load_gpio)) + return PTR_ERR(priv->load_gpio); + + ret = drm_of_find_panel_or_bridge(dev->of_node, 1, -1, + &priv->panel, NULL); + if (ret) + return ret; + + if (priv->panel->backlight) { + dev_err(dev, "the panel already has a backlight controller\n"); + return -ENODEV; + } + + priv->panel_bridge = devm_drm_panel_bridge_add(dev, priv->panel); + if (IS_ERR(priv->panel_bridge)) + return PTR_ERR(priv->panel_bridge); + + priv->regmap = devm_regmap_init_i2c(client, &hx8837_regmap_config); + if (IS_ERR(priv->regmap)) { + dev_err(dev, "regmap init failed\n"); + return PTR_ERR(priv->regmap); + } + + ret = regmap_read(priv->regmap, DCON_REG_ID, &val); + if (ret < 0) { + dev_err(dev, "error reading the model id: %d\n", ret); + return ret; + } + if ((val & 0xff00) != 0xdc00) { + dev_err(dev, "the device is not a hx8837\n"); + return -ENODEV; + } + + ret = regmap_read(priv->regmap, DCON_REG_BRIGHT, &val); + if (ret < 0) { + dev_err(&bl->dev, "error getting the backlight: %d\n", ret); + return ret; + } + bl_props.brightness = val & 0xf; + + bl = devm_backlight_device_register(dev, dev_name(dev), dev, priv, + &hx8837_bl_ops, &bl_props); + if (IS_ERR(bl)) { + dev_err(dev, "failed to register backlight\n"); + return PTR_ERR(bl); + } + + priv->panel->backlight = bl; + + INIT_LIST_HEAD(&priv->bridge.list); + priv->bridge.funcs = &hx8837_bridge_funcs; + priv->bridge.of_node = dev->of_node; + drm_bridge_add(&priv->bridge); + + dev_info(dev, "HiMax HX8837 Display Controller Driver\n"); + return 0; +} + +static int hx8837_remove(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct hx8837_priv *priv = dev_get_drvdata(dev); + + drm_bridge_remove(&priv->bridge); + priv->panel->backlight = NULL; + + return 0; +} + +static const struct of_device_id hx8837_dt_ids[] = { + { .compatible = "himax,hx8837", }, + { } +}; +MODULE_DEVICE_TABLE(of, hx8837_dt_ids); + +static const struct i2c_device_id hx8837_ids[] = { + { "hx8837", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, hx8837_ids); + +static struct i2c_driver hx8837_driver = { + .probe = hx8837_probe, + .remove = hx8837_remove, + .driver = { + .name = "hx8837", + .of_match_table = of_match_ptr(hx8837_dt_ids), + }, + .id_table = hx8837_ids, +}; + +module_i2c_driver(hx8837_driver); + +MODULE_AUTHOR("Lubomir Rintel "); +MODULE_DESCRIPTION("HiMax HX8837 Display Controller Driver"); +MODULE_LICENSE("GPL");