[PATCH RFC 10/15] drm: panel: Add support for Himax HX8369A MIPI DSI panel
From: Liu Ying
Date: Wed Dec 10 2014 - 03:49:44 EST
This patch adds support for Himax HX8369A MIPI DSI panel.
Signed-off-by: Liu Ying <Ying.Liu@xxxxxxxxxxxxx>
---
.../devicetree/bindings/panel/himax,hx8369a.txt | 86 +++
drivers/gpu/drm/panel/Kconfig | 6 +
drivers/gpu/drm/panel/Makefile | 1 +
drivers/gpu/drm/panel/panel-hx8369a.c | 627 +++++++++++++++++++++
4 files changed, 720 insertions(+)
create mode 100644 Documentation/devicetree/bindings/panel/himax,hx8369a.txt
create mode 100644 drivers/gpu/drm/panel/panel-hx8369a.c
diff --git a/Documentation/devicetree/bindings/panel/himax,hx8369a.txt b/Documentation/devicetree/bindings/panel/himax,hx8369a.txt
new file mode 100644
index 0000000..6fe251e
--- /dev/null
+++ b/Documentation/devicetree/bindings/panel/himax,hx8369a.txt
@@ -0,0 +1,86 @@
+Himax HX8369A WVGA 16.7M color TFT single chip driver with internal GRAM
+
+Himax HX8369A is a WVGA resolution driving controller.
+It is designed to provide a single chip solution that combines a source
+driver and power supply circuits to drive a TFT dot matrix LCD with
+480RGBx864 dots at the maximum.
+
+The HX8369A supports several interface modes, including MPU MIPI DBI Type
+A/B mode, MIPI DPI/DBI Type C mode, MIPI DSI video mode, MIPI DSI command
+mode and MDDI mode. The interface mode is selected by the external hardware
+pins BS[3:0].
+
+Currently, only the MIPI DSI video mode is supported.
+
+Required properties:
+ - compatible: "himax,hx8369a-dsi"
+ - reg: the virtual channel number of a DSI peripheral
+ - reset-gpios: a GPIO spec for the reset pin
+ - data-lanes: the data lane number of a DSI peripheral
+ - display-timings: timings for the connected panel as described by [1]
+ - bs: the interface mode number described by the following table
+ --------------------------
+ | DBI_TYPE_A_8BIT | 0 |
+ | DBI_TYPE_A_9BIT | 1 |
+ | DBI_TYPE_A_16BIT | 2 |
+ | DBI_TYPE_A_18BIT | 3 |
+ | DBI_TYPE_B_8BIT | 4 |
+ | DBI_TYPE_B_9BIT | 5 |
+ | DBI_TYPE_B_16BIT | 6 |
+ | DBI_TYPE_B_18BIT | 7 |
+ | DSI_CMD_MODE | 8 |
+ | DBI_TYPE_B_24BIT | 9 |
+ | DSI_VIDEO_MODE | 10 |
+ | MDDI | 11 |
+ | DPI_DBI_TYPE_C_OPT1 | 12 |
+ | DPI_DBI_TYPE_C_OPT2 | 13 |
+ | DPI_DBI_TYPE_C_OPT3 | 14 |
+ --------------------------
+
+Optional properties:
+ - power-on-delay: delay after turning regulators on [ms]
+ - reset-delay: delay after reset sequence [ms]
+ - vdd1-supply: I/O and interface power supply
+ - vdd2-supply: analog power supply
+ - vdd3-supply: logic power supply
+ - dsi-vcc-supply: DSI and MDDI power supply
+ - vpp-supply: OTP programming voltage
+ - bs0-gpios: a GPIO spec for the pin BS0
+ - bs1-gpios: a GPIO spec for the pin BS1
+ - bs2-gpios: a GPIO spec for the pin BS2
+ - bs3-gpios: a GPIO spec for the pin BS3
+ - panel-width-mm: physical panel width [mm]
+ - panel-height-mm: physical panel height [mm]
+
+[1]: Documentation/devicetree/bindings/video/display-timing.txt
+
+Example:
+ panel@0 {
+ compatible = "himax,hx8369a-dsi";
+ reg = <0>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_mipi_panel>;
+ reset-gpios = <&gpio6 11 GPIO_ACTIVE_LOW>;
+ reset-delay = <120>;
+ bs2-gpios = <&gpio6 14 GPIO_ACTIVE_HIGH>;
+ data-lanes = <2>;
+ panel-width-mm = <45>;
+ panel-height-mm = <76>;
+ bs = <10>;
+ status = "okay";
+
+ display-timings {
+ native-mode = <&timing1>;
+ timing1: truly-tft480800-16-e {
+ clock-frequency = <26400000>;
+ hactive = <480>;
+ vactive = <800>;
+ hfront-porch = <8>;
+ hback-porch = <8>;
+ hsync-len = <8>;
+ vfront-porch = <6>;
+ vback-porch = <6>;
+ vsync-len = <6>;
+ };
+ };
+};
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 024e98e..f1a5b58 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -40,4 +40,10 @@ 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_HX8369A
+ tristate "HX8369A panel"
+ depends on OF
+ select DRM_MIPI_DSI
+ select VIDEOMODE_HELPERS
+
endmenu
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index 4b2a043..d6768ca 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -2,3 +2,4 @@ obj-$(CONFIG_DRM_PANEL_SIMPLE) += panel-simple.o
obj-$(CONFIG_DRM_PANEL_LD9040) += panel-ld9040.o
obj-$(CONFIG_DRM_PANEL_S6E8AA0) += panel-s6e8aa0.o
obj-$(CONFIG_DRM_PANEL_SHARP_LQ101R1SX01) += panel-sharp-lq101r1sx01.o
+obj-$(CONFIG_DRM_PANEL_HX8369A) += panel-hx8369a.o
diff --git a/drivers/gpu/drm/panel/panel-hx8369a.c b/drivers/gpu/drm/panel/panel-hx8369a.c
new file mode 100644
index 0000000..a8cdaea
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-hx8369a.c
@@ -0,0 +1,627 @@
+/*
+ * Himax HX8369A panel driver.
+ *
+ * Copyright (C) 2011-2014 Freescale Semiconductor, Inc.
+ *
+ * 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 driver is based on Samsung s6e8aa0 panel driver.
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_panel.h>
+
+#include <linux/gpio/consumer.h>
+#include <linux/regulator/consumer.h>
+
+#include <video/mipi_display.h>
+#include <video/of_videomode.h>
+#include <video/videomode.h>
+
+#define SETCLUMN_ADDR 0x2a
+#define SETPAGE_ADDR 0x2b
+#define SETPIXEL_FMT 0x3a
+#define WRDISBV 0x51
+#define WRCTRLD 0x53
+#define WRCABC 0x55
+#define SETPOWER 0xb1
+#define SETDISP 0xb2
+#define SETCYC 0xb4
+#define SETVCOM 0xb6
+#define SETEXTC 0xb9
+#define SETMIPI 0xba
+#define SETPANEL 0xcc
+#define SETGIP 0xd5
+#define SETGAMMA 0xe0
+
+enum hx8369a_mpu_interface {
+ HX8369A_DBI_TYPE_A_8BIT,
+ HX8369A_DBI_TYPE_A_9BIT,
+ HX8369A_DBI_TYPE_A_16BIT,
+ HX8369A_DBI_TYPE_A_18BIT,
+ HX8369A_DBI_TYPE_B_8BIT,
+ HX8369A_DBI_TYPE_B_9BIT,
+ HX8369A_DBI_TYPE_B_16BIT,
+ HX8369A_DBI_TYPE_B_18BIT,
+ HX8369A_DSI_CMD_MODE,
+ HX8369A_DBI_TYPE_B_24BIT,
+ HX8369A_DSI_VIDEO_MODE,
+ HX8369A_MDDI,
+ HX8369A_DPI_DBI_TYPE_C_OPT1,
+ HX8369A_DPI_DBI_TYPE_C_OPT2,
+ HX8369A_DPI_DBI_TYPE_C_OPT3
+};
+
+enum hx8369a_resolution {
+ HX8369A_RES_480_864,
+ HX8369A_RES_480_854,
+ HX8369A_RES_480_800,
+ HX8369A_RES_480_640,
+ HX8369A_RES_360_640,
+ HX8369A_RES_480_720,
+ HX8369A_RES_DISABLE
+};
+
+struct hx8369a {
+ struct device *dev;
+ struct drm_panel panel;
+
+ struct regulator_bulk_data supplies[5];
+ struct gpio_desc *reset_gpio;
+ u32 power_on_delay;
+ u32 reset_delay;
+ struct gpio_desc *bs_gpio[4];
+ u32 data_lanes;
+ u32 mpu_interface;
+ struct videomode vm;
+ u32 width_mm;
+ u32 height_mm;
+ u8 res_sel;
+};
+
+static inline struct hx8369a *panel_to_hx8369a(struct drm_panel *panel)
+{
+ return container_of(panel, struct hx8369a, panel);
+}
+
+static bool hx8369a_is_dsi_interface(struct hx8369a *ctx) {
+ if (ctx->mpu_interface == HX8369A_DSI_VIDEO_MODE ||
+ ctx->mpu_interface == HX8369A_DSI_CMD_MODE)
+ return true;
+
+ return false;
+}
+
+static void hx8369a_dcs_write(struct hx8369a *ctx, const void *data, size_t len)
+{
+ struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
+ ssize_t ret;
+
+ ret = mipi_dsi_dcs_write_buffer(dsi, data, len);
+ if (ret < 0)
+ dev_err(ctx->dev, "error %zd writing dcs seq: %*ph\n", ret, len,
+ data);
+}
+
+#define hx8369a_dcs_write_seq(ctx, seq...) \
+({\
+ const u8 d[] = { seq };\
+ BUILD_BUG_ON_MSG(ARRAY_SIZE(d) > 64, "DCS sequence too big for stack");\
+ hx8369a_dcs_write(ctx, d, ARRAY_SIZE(d));\
+})
+
+#define hx8369a_dcs_write_seq_static(ctx, seq...) \
+({\
+ static const u8 d[] = { seq };\
+ hx8369a_dcs_write(ctx, d, ARRAY_SIZE(d));\
+})
+
+static void hx8369a_dsi_set_display_related_register(struct hx8369a *ctx)
+{
+ u8 sec_p = (ctx->res_sel << 4) | 0x03;
+
+ hx8369a_dcs_write_seq(ctx, SETDISP, 0x00, sec_p, 0x03,
+ 0x03, 0x70, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00,
+ 0x03, 0x03, 0x00, 0x01);
+}
+
+static void hx8369a_dsi_set_display_waveform_cycle(struct hx8369a *ctx)
+{
+ hx8369a_dcs_write_seq_static(ctx, SETCYC, 0x00, 0x1d, 0x5f, 0x0e, 0x06);
+}
+
+static void hx8369a_dsi_set_gip(struct hx8369a *ctx)
+{
+ hx8369a_dcs_write_seq_static(ctx, SETGIP, 0x00, 0x04, 0x03, 0x00, 0x01,
+ 0x05, 0x1c, 0x70, 0x01, 0x03, 0x00, 0x00, 0x40,
+ 0x06, 0x51, 0x07, 0x00, 0x00, 0x41, 0x06, 0x50,
+ 0x07, 0x07, 0x0f, 0x04);
+}
+
+static void hx8369a_dsi_set_power(struct hx8369a *ctx)
+{
+ hx8369a_dcs_write_seq_static(ctx, SETPOWER, 0x01, 0x00, 0x34, 0x06, 0x00,
+ 0x0f, 0x0f, 0x2a, 0x32, 0x3f, 0x3f, 0x07, 0x3a,
+ 0x01, 0xe6, 0xe6, 0xe6, 0xe6, 0xe6);
+}
+
+static void hx8369a_dsi_set_vcom_voltage(struct hx8369a *ctx)
+{
+ hx8369a_dcs_write_seq_static(ctx, SETVCOM, 0x56, 0x56);
+}
+
+static void hx8369a_dsi_set_panel(struct hx8369a *ctx)
+{
+ hx8369a_dcs_write_seq_static(ctx, SETPANEL, 0x02);
+}
+
+static void hx8369a_dsi_set_gamma_curve(struct hx8369a *ctx)
+{
+ hx8369a_dcs_write_seq_static(ctx, SETGAMMA, 0x00, 0x1d, 0x22, 0x38, 0x3d,
+ 0x3f, 0x2e, 0x4a, 0x06, 0x0d, 0x0f, 0x13, 0x15,
+ 0x13, 0x16, 0x10, 0x19, 0x00, 0x1d, 0x22, 0x38,
+ 0x3d, 0x3f, 0x2e, 0x4a, 0x06, 0x0d, 0x0f, 0x13,
+ 0x15, 0x13, 0x16, 0x10, 0x19);
+}
+
+static void hx8369a_dsi_set_mipi(struct hx8369a *ctx)
+{
+ u8 eleventh_p = ctx->data_lanes == 2 ? 0x11 : 0x10;
+
+ hx8369a_dcs_write_seq(ctx, SETMIPI, 0x00, 0xa0, 0xc6, 0x00, 0x0a, 0x00,
+ 0x10, 0x30, 0x6f, 0x02, eleventh_p, 0x18, 0x40);
+}
+
+static void hx8369a_dsi_set_interface_pixel_fomat(struct hx8369a *ctx)
+{
+ struct mipi_dsi_device * dsi = to_mipi_dsi_device(ctx->dev);
+ u8 bpp;
+
+ if (dsi->format == MIPI_DSI_FMT_RGB888)
+ bpp = 0x77;
+ else if (dsi->format == MIPI_DSI_FMT_RGB565)
+ bpp = 0x55;
+ else
+ bpp = 0x66;
+
+ hx8369a_dcs_write_seq(ctx, SETPIXEL_FMT, bpp);
+}
+
+static void hx8369a_dsi_set_column_address(struct hx8369a *ctx)
+{
+ u8 ecl = 0;
+
+ switch (ctx->res_sel) {
+ case HX8369A_RES_480_864:
+ case HX8369A_RES_480_854:
+ case HX8369A_RES_480_800:
+ case HX8369A_RES_480_640:
+ case HX8369A_RES_480_720:
+ ecl = 0xdf;
+ break;
+ case HX8369A_RES_360_640:
+ ecl = 0x67;
+ break;
+ }
+
+ hx8369a_dcs_write_seq(ctx, SETCLUMN_ADDR, 0x00, 0x00, 0x01, ecl);
+}
+
+static void hx8369a_dsi_set_page_address(struct hx8369a *ctx)
+{
+ u8 epl = 0, eph = 0;
+
+ switch (ctx->res_sel) {
+ case HX8369A_RES_480_864:
+ epl = 0x5f;
+ eph = 0x03;
+ break;
+ case HX8369A_RES_480_854:
+ epl = 0x55;
+ eph = 0x03;
+ break;
+ case HX8369A_RES_480_800:
+ epl = 0x1f;
+ eph = 0x03;
+ break;
+ case HX8369A_RES_480_640:
+ case HX8369A_RES_360_640:
+ epl = 0x7f;
+ eph = 0x02;
+ break;
+ case HX8369A_RES_480_720:
+ epl = 0xcf;
+ eph = 0x02;
+ break;
+ }
+
+ hx8369a_dcs_write_seq(ctx, SETPAGE_ADDR, 0x00, 0x00, eph, epl);
+}
+
+static void hx8369a_dsi_write_display_brightness(struct hx8369a *ctx)
+{
+ hx8369a_dcs_write_seq_static(ctx, WRDISBV, 0xff);
+}
+
+static void hx8369a_dsi_write_cabc(struct hx8369a *ctx)
+{
+ hx8369a_dcs_write_seq_static(ctx, WRCABC, 0x01);
+}
+
+static void hx8369a_dsi_write_control_display(struct hx8369a *ctx)
+{
+ hx8369a_dcs_write_seq_static(ctx, WRCTRLD, 0x24);
+}
+
+static void hx8369a_dsi_panel_init(struct hx8369a *ctx)
+{
+ hx8369a_dsi_set_display_related_register(ctx);
+ hx8369a_dsi_set_display_waveform_cycle(ctx);
+ hx8369a_dsi_set_gip(ctx);
+ hx8369a_dsi_set_power(ctx);
+ hx8369a_dsi_set_vcom_voltage(ctx);
+ hx8369a_dsi_set_panel(ctx);
+ hx8369a_dsi_set_gamma_curve(ctx);
+ hx8369a_dsi_set_mipi(ctx);
+ hx8369a_dsi_set_interface_pixel_fomat(ctx);
+ hx8369a_dsi_set_column_address(ctx);
+ hx8369a_dsi_set_page_address(ctx);
+ hx8369a_dsi_write_display_brightness(ctx);
+ hx8369a_dsi_write_cabc(ctx);
+ hx8369a_dsi_write_control_display(ctx);
+}
+
+static void hx8369a_dsi_set_extension_command(struct hx8369a *ctx)
+{
+ hx8369a_dcs_write_seq_static(ctx, SETEXTC, 0xff, 0x83, 0x69);
+}
+
+static void hx8369a_dsi_set_maximum_return_packet_size(struct hx8369a *ctx,
+ u16 size)
+{
+ struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
+ int ret;
+
+ ret = mipi_dsi_set_maximum_return_packet_size(dsi, size);
+ if (ret < 0)
+ dev_err(ctx->dev,
+ "error %d setting maximum return packet size to %d\n",
+ ret, size);
+}
+
+static int hx8369a_dsi_set_sequence(struct hx8369a *ctx)
+{
+ struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
+ int ret;
+
+ hx8369a_dsi_set_extension_command(ctx);
+ hx8369a_dsi_set_maximum_return_packet_size(ctx, 4);
+ hx8369a_dsi_panel_init(ctx);
+
+ ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
+ if (ret < 0) {
+ dev_err(ctx->dev, "failed to exit sleep mode: %d\n", ret);
+ return ret;
+ }
+
+ ret = mipi_dsi_dcs_set_display_on(dsi);
+ if (ret < 0) {
+ dev_err(ctx->dev, "failed to set display on: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int hx8369a_power_on(struct hx8369a *ctx)
+{
+ int ret;
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+ if (ret < 0)
+ return ret;
+
+ msleep(ctx->power_on_delay);
+
+ gpiod_set_value(ctx->reset_gpio, 1);
+ usleep_range(50, 60);
+ gpiod_set_value(ctx->reset_gpio, 0);
+
+ msleep(ctx->reset_delay);
+
+ return 0;
+}
+
+static int hx8369a_power_off(struct hx8369a *ctx)
+{
+ return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);;
+}
+
+static int hx8369a_dsi_disable(struct drm_panel *panel)
+{
+ return 0;
+}
+
+static int hx8369a_dsi_unprepare(struct drm_panel *panel)
+{
+ struct hx8369a *ctx = panel_to_hx8369a(panel);
+ struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
+ int ret;
+
+ ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
+ if (ret < 0) {
+ dev_err(ctx->dev, "failed to enter sleep mode: %d\n", ret);
+ return ret;
+ }
+
+ ret = mipi_dsi_dcs_set_display_off(dsi);
+ if (ret < 0) {
+ dev_err(ctx->dev, "failed to set display off: %d\n", ret);
+ return ret;
+ }
+
+ msleep(40);
+
+ return hx8369a_power_off(ctx);
+}
+
+static int hx8369a_dsi_prepare(struct drm_panel *panel)
+{
+ struct hx8369a *ctx = panel_to_hx8369a(panel);
+ int ret;
+
+ ret = hx8369a_power_on(ctx);
+ if (ret < 0)
+ return ret;
+
+ ret = hx8369a_dsi_set_sequence(ctx);
+
+ return ret;
+}
+
+static int hx8369a_dsi_enable(struct drm_panel *panel)
+{
+ return 0;
+}
+
+static int hx8369a_get_modes(struct drm_panel *panel)
+{
+ struct drm_connector *connector = panel->connector;
+ struct hx8369a *ctx = panel_to_hx8369a(panel);
+ struct drm_display_mode *mode;
+
+ mode = drm_mode_create(connector->dev);
+ if (!mode) {
+ DRM_ERROR("failed to create a new display mode\n");
+ return 0;
+ }
+
+ drm_display_mode_from_videomode(&ctx->vm, mode);
+ mode->width_mm = ctx->width_mm;
+ mode->height_mm = ctx->height_mm;
+ connector->display_info.width_mm = mode->width_mm;
+ connector->display_info.height_mm = mode->height_mm;
+
+ mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
+ drm_mode_probed_add(connector, mode);
+
+ return 1;
+}
+
+static const struct drm_panel_funcs hx8369a_dsi_drm_funcs = {
+ .disable = hx8369a_dsi_disable,
+ .unprepare = hx8369a_dsi_unprepare,
+ .prepare = hx8369a_dsi_prepare,
+ .enable = hx8369a_dsi_enable,
+ .get_modes = hx8369a_get_modes,
+};
+
+static int hx8369a_parse_dt(struct hx8369a *ctx)
+{
+ struct device *dev = ctx->dev;
+ struct device_node *np = dev->of_node;
+ int ret;
+
+ ret = of_get_videomode(np, &ctx->vm, 0);
+ if (ret < 0)
+ return ret;
+
+ of_property_read_u32(np, "bs", &ctx->mpu_interface);
+ if (ctx->mpu_interface != HX8369A_DSI_VIDEO_MODE &&
+ ctx->mpu_interface != HX8369A_DSI_CMD_MODE) {
+ dev_err(dev, "unsupported MPU interface 0x%01x\n",
+ ctx->mpu_interface);
+ return -EINVAL;
+ }
+
+ if (hx8369a_is_dsi_interface(ctx)) {
+ ret = of_property_read_u32(np, "data-lanes", &ctx->data_lanes);
+ if (ret || ctx->data_lanes == 0 || ctx->data_lanes > 2) {
+ dev_err(dev, "cannot get correct data lanes\n");
+ return -EINVAL;
+ }
+ }
+
+ of_property_read_u32(np, "power-on-delay", &ctx->power_on_delay);
+ of_property_read_u32(np, "reset-delay", &ctx->reset_delay);
+ of_property_read_u32(np, "panel-width-mm", &ctx->width_mm);
+ of_property_read_u32(np, "panel-height-mm", &ctx->height_mm);
+
+ return 0;
+}
+
+static int hx8369a_vm_to_res_sel(struct hx8369a *ctx)
+{
+ switch (ctx->vm.hactive) {
+ case 480:
+ switch (ctx->vm.vactive) {
+ case 864:
+ ctx->res_sel = HX8369A_RES_480_864;
+ break;
+ case 854:
+ ctx->res_sel = HX8369A_RES_480_854;
+ break;
+ case 800:
+ ctx->res_sel = HX8369A_RES_480_800;
+ break;
+ case 640:
+ ctx->res_sel = HX8369A_RES_480_640;
+ break;
+ case 720:
+ ctx->res_sel = HX8369A_RES_480_720;
+ break;
+ default:
+ ctx->res_sel = HX8369A_RES_DISABLE;
+ break;
+ }
+ break;
+ case 360:
+ if (ctx->vm.vactive == 640)
+ ctx->res_sel = HX8369A_RES_360_640;
+ else
+ ctx->res_sel = HX8369A_RES_DISABLE;
+ break;
+ default:
+ ctx->res_sel = HX8369A_RES_DISABLE;
+ break;
+ }
+
+ if (ctx->res_sel == HX8369A_RES_DISABLE) {
+ dev_err(ctx->dev, "unsupported resolution %dx%d\n",
+ ctx->vm.hactive, ctx->vm.vactive);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int hx8369a_dsi_probe(struct mipi_dsi_device *dsi)
+{
+ struct device *dev = &dsi->dev;
+ struct hx8369a *ctx;
+ int ret, i;
+ char bs[4];
+
+ ctx = devm_kzalloc(dev, sizeof(struct hx8369a), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ ctx->dev = dev;
+
+ ret = hx8369a_parse_dt(ctx);
+ if (ret < 0)
+ return ret;
+
+ ret = hx8369a_vm_to_res_sel(ctx);
+ if (ret < 0)
+ return ret;
+
+ ctx->supplies[0].supply = "vdd1";
+ ctx->supplies[1].supply = "vdd2";
+ ctx->supplies[2].supply = "vdd3";
+ ctx->supplies[3].supply = "dsi-vcc";
+ ctx->supplies[4].supply = "vpp";
+ ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
+ ctx->supplies);
+ if (ret < 0) {
+ dev_err(dev, "failed to get regulators: %d\n", ret);
+ return ret;
+ }
+
+ ctx->reset_gpio = devm_gpiod_get(dev, "reset");
+ if (IS_ERR(ctx->reset_gpio)) {
+ dev_err(dev, "cannot get reset-gpios %ld\n",
+ PTR_ERR(ctx->reset_gpio));
+ return PTR_ERR(ctx->reset_gpio);
+ }
+ ret = gpiod_direction_output(ctx->reset_gpio, 0);
+ if (ret < 0) {
+ dev_err(dev, "cannot configure reset-gpios %d\n", ret);
+ return ret;
+ }
+
+ for (i = 0; i < 4; i++) {
+ snprintf(bs, sizeof(bs), "bs%d", i);
+ ctx->bs_gpio[i] = devm_gpiod_get(dev, bs);
+ if (IS_ERR(ctx->bs_gpio[i]))
+ continue;
+
+ ret = gpiod_direction_output(ctx->bs_gpio[i], 1);
+ if (ret < 0) {
+ dev_err(dev, "cannot configure bs%d-gpio %d\n", i, ret);
+ return ret;
+ }
+ dev_dbg(dev, "bs%d-gpio is configured\n", i);
+ }
+
+ drm_panel_init(&ctx->panel);
+ ctx->panel.dev = dev;
+ ctx->panel.funcs = &hx8369a_dsi_drm_funcs;
+
+ ret = drm_panel_add(&ctx->panel);
+ if (ret < 0)
+ return ret;
+
+ mipi_dsi_set_drvdata(dsi, ctx);
+
+ dsi->channel = 0;
+ dsi->lanes = ctx->data_lanes;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
+ MIPI_DSI_MODE_VIDEO_BURST |
+ MIPI_DSI_MODE_VIDEO_SYNC_PULSE;
+ ret = mipi_dsi_attach(dsi);
+ if (ret < 0)
+ drm_panel_remove(&ctx->panel);
+
+ return ret;
+}
+
+static int hx8369a_dsi_remove(struct mipi_dsi_device *dsi)
+{
+ struct hx8369a *ctx = mipi_dsi_get_drvdata(dsi);
+
+ mipi_dsi_detach(dsi);
+ drm_panel_remove(&ctx->panel);
+
+ return 0;
+}
+
+static const struct of_device_id hx8369a_dsi_of_match[] = {
+ { .compatible = "himax,hx8369a-dsi" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, hx8369a_dsi_of_match);
+
+static struct mipi_dsi_driver hx8369a_dsi_driver = {
+ .probe = hx8369a_dsi_probe,
+ .remove = hx8369a_dsi_remove,
+ .driver = {
+ .name = "panel-hx8369a-dsi",
+ .of_match_table = hx8369a_dsi_of_match,
+ },
+};
+
+static int __init hx8369a_init(void)
+{
+ int err;
+
+ err = mipi_dsi_driver_register(&hx8369a_dsi_driver);
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+module_init(hx8369a_init);
+
+static void __exit hx8369a_exit(void)
+{
+ mipi_dsi_driver_unregister(&hx8369a_dsi_driver);
+}
+module_exit(hx8369a_exit);
+
+MODULE_DESCRIPTION("Himax HX8369A panel driver");
+MODULE_LICENSE("GPL v2");
--
2.1.0
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/