Hello,
Am 06.05.2015 09:49, schrieb Heiko Schocher:
The patch adds LG4573 parallel RGB panel driver with SPI control interface. The driver uses drm_panel framework.
Signed-off-by: Heiko Schocher hs@denx.de
.../devicetree/bindings/panel/lg,lg4573.txt | 42 +++ drivers/gpu/drm/panel/Kconfig | 8 + drivers/gpu/drm/panel/Makefile | 1 + drivers/gpu/drm/panel/panel-lg4573.c | 367 +++++++++++++++++++++ 4 files changed, 418 insertions(+) create mode 100644 Documentation/devicetree/bindings/panel/lg,lg4573.txt create mode 100644 drivers/gpu/drm/panel/panel-lg4573.c
ping...
bye, Heiko
diff --git a/Documentation/devicetree/bindings/panel/lg,lg4573.txt b/Documentation/devicetree/bindings/panel/lg,lg4573.txt new file mode 100644 index 0000000..55f495d --- /dev/null +++ b/Documentation/devicetree/bindings/panel/lg,lg4573.txt @@ -0,0 +1,42 @@ +LG LG4573 TFT liquid crystal display with SPI control bus
+Required properties:
- compatible: "lg4573"
- reg: address of the panel on SPI bus
- display-timings: timings for the connected panel according to [1]
+The panel must obey rules for SPI slave device specified in document [2].
+Optional properties:
- power-on-delay: delay after turning regulators on [ms]
+[1]: Documentation/devicetree/bindings/video/display-timing.txt +[2]: Documentation/devicetree/bindings/spi/spi-bus.txt
+Example:
- lcd_panel: display@0 {
#address-cells = <1>;#size-cells = <1>;compatible = "lg,lg4573";spi-max-frequency = <10000000>;reset-gpios = <&gpio2 11 0>;reg = <0>;power-on-delay = <10>;display-timings {480x800p57 {native-mode;clock-frequency = <27000027>;hactive = <480>;vactive = <800>;hfront-porch = <10>;hback-porch = <59>;hsync-len = <10>;vback-porch = <15>;vfront-porch = <15>;vsync-len = <15>;hsync-active = <1>;vsync-active = <1>;};};- };
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig index 6d64c7b..29c3407 100644 --- a/drivers/gpu/drm/panel/Kconfig +++ b/drivers/gpu/drm/panel/Kconfig @@ -23,6 +23,14 @@ config DRM_PANEL_LD9040 depends on OF && SPI select VIDEOMODE_HELPERS
+config DRM_PANEL_LG4573
- tristate "LG4573 RGB/SPI panel"
- depends on OF && SPI
- select VIDEOMODE_HELPERS
- help
Say Y here if you want to enable support for LG4573 RGB panel.To compile this driver as a module, choose M here.- config DRM_PANEL_S6E8AA0 tristate "S6E8AA0 DSI video mode panel" depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile index 4b2a043..715b95d 100644 --- a/drivers/gpu/drm/panel/Makefile +++ b/drivers/gpu/drm/panel/Makefile @@ -1,4 +1,5 @@ obj-$(CONFIG_DRM_PANEL_SIMPLE) += panel-simple.o obj-$(CONFIG_DRM_PANEL_LD9040) += panel-ld9040.o +obj-$(CONFIG_DRM_PANEL_LG4573) += panel-lg4573.o obj-$(CONFIG_DRM_PANEL_S6E8AA0) += panel-s6e8aa0.o obj-$(CONFIG_DRM_PANEL_SHARP_LQ101R1SX01) += panel-sharp-lq101r1sx01.o diff --git a/drivers/gpu/drm/panel/panel-lg4573.c b/drivers/gpu/drm/panel/panel-lg4573.c new file mode 100644 index 0000000..9d5e5a5 --- /dev/null +++ b/drivers/gpu/drm/panel/panel-lg4573.c @@ -0,0 +1,367 @@ +/*
- Copyright (C) 2015 Heiko Schocher hs@denx.de
- from:
- drivers/gpu/drm/panel/panel-ld9040.c
- ld9040 AMOLED LCD drm_panel driver.
- Copyright (c) 2014 Samsung Electronics Co., Ltd
- Derived from drivers/video/backlight/ld9040.c
- Andrzej Hajda a.hajda@samsung.com
- 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 <drm/drmP.h> +#include <drm/drm_panel.h>
+#include <linux/gpio/consumer.h> +#include <linux/regulator/consumer.h> +#include <linux/spi/spi.h>
+#include <video/mipi_display.h> +#include <video/of_videomode.h> +#include <video/videomode.h>
+struct lg4573 {
- struct device *dev;
- struct drm_panel panel;
- u32 power_on_delay;
- struct videomode vm;
+};
+static inline struct lg4573 *panel_to_lg4573(struct drm_panel *panel) +{
- return container_of(panel, struct lg4573, panel);
+}
+static int lg4573_spi_write_u16(struct lg4573 *ctx, u16 data) +{
- struct spi_device *spi = to_spi_device(ctx->dev);
- struct spi_transfer xfer = {
.len = 2,- };
- struct spi_message msg;
- u16 temp = htons(data);
- dev_dbg(ctx->dev, "writing data: %x\n", data);
- xfer.tx_buf = &temp;
- spi_message_init(&msg);
- spi_message_add_tail(&xfer, &msg);
- return spi_sync(spi, &msg);
+}
+static void lg4573_spi_write_u16_array(struct lg4573 *ctx, u16 *buff, int size) +{
- int idx;
- for (idx = 0; idx < size; idx++)
lg4573_spi_write_u16(ctx, buff[idx]);+}
+static void lg4573_display_on(struct lg4573 *ctx) +{
- static u16 sleep_out = 0x7011;
- static u16 display_on = 0x7029;
- lg4573_spi_write_u16(ctx, sleep_out);
- msleep(ctx->power_on_delay);
- lg4573_spi_write_u16(ctx, display_on);
+}
+static int lg4573_display_off(struct lg4573 *ctx) +{
- static u16 display_off = 0x7028;
- static u16 sleep_in = 0x7010;
- lg4573_spi_write_u16(ctx, display_off);
- msleep(ctx->power_on_delay);
- lg4573_spi_write_u16(ctx, sleep_in);
- return 0;
+}
+static void lg4573_display_mode_settings(struct lg4573 *ctx) +{
- static u16 display_mode_settings[] = {
0x703A,0x7270,0x70B1,0x7208,0x723B,0x720F,0x70B2,0x7200,0x72C8,0x70B3,0x7200,0x70B4,0x7200,0x70B5,0x7242,0x7210,0x7210,0x7200,0x7220,0x70B6,0x720B,0x720F,0x723C,0x7213,0x7213,0x72E8,0x70B7,0x7246,0x7206,0x720C,0x7200,0x7200,- };
- dev_dbg(ctx->dev, "transfer display mode settings\n");
- lg4573_spi_write_u16_array(ctx, display_mode_settings,
ARRAY_SIZE(display_mode_settings));+}
+static void lg4573_power_settings(struct lg4573 *ctx) +{
- static u16 power_settings[] = {
0x70C0,0x7201,0x7211,0x70C3,0x7207,0x7203,0x7204,0x7204,0x7204,0x70C4,0x7212,0x7224,0x7218,0x7218,0x7202,0x7249,0x70C5,0x726F,0x70C6,0x7241,0x7263,- };
- dev_dbg(ctx->dev, "transfer power settings\n");
- lg4573_spi_write_u16_array(ctx, power_settings,
ARRAY_SIZE(power_settings));+}
+static void lg4573_gamma_settings(struct lg4573 *ctx) +{
- static u16 gamma_settings[] = {
0x70D0,0x7203,0x7207,0x7273,0x7235,0x7200,0x7201,0x7220,0x7200,0x7203,0x70D1,0x7203,0x7207,0x7273,0x7235,0x7200,0x7201,0x7220,0x7200,0x7203,0x70D2,0x7203,0x7207,0x7273,0x7235,0x7200,0x7201,0x7220,0x7200,0x7203,0x70D3,0x7203,0x7207,0x7273,0x7235,0x7200,0x7201,0x7220,0x7200,0x7203,0x70D4,0x7203,0x7207,0x7273,0x7235,0x7200,0x7201,0x7220,0x7200,0x7203,0x70D5,0x7203,0x7207,0x7273,0x7235,0x7200,0x7201,0x7220,0x7200,0x7203,- };
- dev_dbg(ctx->dev, "transfer gamma settings\n");
- lg4573_spi_write_u16_array(ctx, gamma_settings,
ARRAY_SIZE(gamma_settings));+}
+static void lg4573_init(struct lg4573 *ctx) +{
- dev_dbg(ctx->dev, "initializing LCD\n");
- lg4573_display_mode_settings(ctx);
- lg4573_power_settings(ctx);
- lg4573_gamma_settings(ctx);
+}
+static int lg4573_power_on(struct lg4573 *ctx) +{
- msleep(ctx->power_on_delay);
- lg4573_display_on(ctx);
- return 0;
+}
+static int lg4573_disable(struct drm_panel *panel) +{
- struct lg4573 *ctx = panel_to_lg4573(panel);
- return lg4573_display_off(ctx);
+}
+static int lg4573_enable(struct drm_panel *panel) +{
- struct lg4573 *ctx = panel_to_lg4573(panel);
- int ret;
- lg4573_init(ctx);
- ret = lg4573_power_on(ctx);
- return ret;
+}
+static int lg4573_get_modes(struct drm_panel *panel) +{
- struct drm_connector *connector = panel->connector;
- struct lg4573 *ctx = panel_to_lg4573(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->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
- drm_mode_probed_add(connector, mode);
- return 1;
+}
+static const struct drm_panel_funcs lg4573_drm_funcs = {
- .disable = lg4573_disable,
- .enable = lg4573_enable,
- .get_modes = lg4573_get_modes,
+};
+static int lg4573_parse_dt(struct lg4573 *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, "power-on-delay", &ctx->power_on_delay);
- return 0;
+}
+static int lg4573_probe(struct spi_device *spi) +{
- struct device *dev = &spi->dev;
- struct lg4573 *ctx;
- int ret;
- ctx = devm_kzalloc(dev, sizeof(struct lg4573), GFP_KERNEL);
- if (!ctx)
return -ENOMEM;- spi_set_drvdata(spi, ctx);
- ctx->dev = dev;
- ret = lg4573_parse_dt(ctx);
- if (ret < 0)
return ret;- spi->bits_per_word = 8;
- ret = spi_setup(spi);
- if (ret < 0) {
dev_err(dev, "spi setup failed.\n");return ret;- }
- drm_panel_init(&ctx->panel);
- ctx->panel.dev = dev;
- ctx->panel.funcs = &lg4573_drm_funcs;
- return drm_panel_add(&ctx->panel);
+}
+static int lg4573_remove(struct spi_device *spi) +{
- struct lg4573 *ctx = spi_get_drvdata(spi);
- lg4573_display_off(ctx);
- drm_panel_remove(&ctx->panel);
- return 0;
+}
+static const struct of_device_id lg4573_of_match[] = {
- { .compatible = "lg,lg4573" },
- { }
+}; +MODULE_DEVICE_TABLE(of, lg4573_of_match);
+static struct spi_driver lg4573_driver = {
- .probe = lg4573_probe,
- .remove = lg4573_remove,
- .driver = {
.name = "lg4573",.owner = THIS_MODULE,.of_match_table = lg4573_of_match,- },
+}; +module_spi_driver(lg4573_driver);
+MODULE_AUTHOR("Heiko Schocher hs@denx.de"); +MODULE_DESCRIPTION("lg4573 LCD Driver"); +MODULE_LICENSE("GPL v2");