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authorInki Dae <inki.dae@samsung.com>2014-10-24 06:04:33 (GMT)
committerChanho Park <chanho61.park@samsung.com>2014-11-18 03:01:05 (GMT)
commit9292ba6e397fe426a2a91d3526394f9054fc4d8c (patch)
tree98f404b8a21ac989703a6874fb45922fa2a06e96
parentc01f9d17cacb30d8857db29512a9871deaf6d386 (diff)
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drm/panel: s6e63j0x03: add brightness feature
Change-Id: I9b4b9060a9c8ef63f969951da4bd1b9cc26fa553 Signed-off-by: Inki Dae <inki.dae@samsung.com>
-rw-r--r--drivers/gpu/drm/panel/panel-s6e63j0x03.c193
1 files changed, 189 insertions, 4 deletions
diff --git a/drivers/gpu/drm/panel/panel-s6e63j0x03.c b/drivers/gpu/drm/panel/panel-s6e63j0x03.c
index ac527e5..b5b0ec4 100644
--- a/drivers/gpu/drm/panel/panel-s6e63j0x03.c
+++ b/drivers/gpu/drm/panel/panel-s6e63j0x03.c
@@ -17,6 +17,7 @@
#include <linux/of_gpio.h>
#include <linux/gpio.h>
#include <linux/regulator/consumer.h>
+#include <linux/backlight.h>
#include <video/mipi_display.h>
#include <video/of_videomode.h>
@@ -27,9 +28,20 @@
/* Manufacturer Command Set */
#define MCS_MTP_ID 0xD3
+#define MCS_MTP_SET3 0xd4
+#define MCS_MTP_KEY 0xf1
+
+#define MIN_BRIGHTNESS 0
+#define MAX_BRIGHTNESS 100
+#define DEFAULT_BRIGHTNESS 80
+
+#define GAMMA_CMD_CNT 28
+#define MAX_GAMMA_CNT 11
+
struct s6e63j0x03 {
struct device *dev;
struct drm_panel panel;
+ struct backlight_device *bl_dev;
struct regulator_bulk_data supplies[2];
int reset_gpio;
@@ -44,7 +56,7 @@ struct s6e63j0x03 {
u32 width_mm;
u32 height_mm;
- int brightness;
+ int power;
/* This field is tested by functions directly accessing DSI bus before
* transfer, transfer is skipped if it is set. In case of transfer
@@ -55,6 +67,83 @@ struct s6e63j0x03 {
int error;
};
+static const unsigned char GAMMA_10[] = {
+ MCS_MTP_SET3,
+ 0x00, 0x00, 0x00, 0x7f, 0x7f, 0x7f, 0x52, 0x6b, 0x6f, 0x26, 0x28, 0x2d,
+ 0x28, 0x26, 0x27, 0x33, 0x34, 0x32, 0x36, 0x36, 0x35, 0x00, 0xab, 0x00,
+ 0xae, 0x00, 0xbf
+};
+
+static const unsigned char GAMMA_30[] = {
+ MCS_MTP_SET3,
+ 0x00, 0x00, 0x00, 0x70, 0x7f, 0x7f, 0x4e, 0x64, 0x69, 0x26, 0x27, 0x2a,
+ 0x28, 0x29, 0x27, 0x31, 0x32, 0x31, 0x35, 0x34, 0x35, 0x00, 0xc4, 0x00,
+ 0xca, 0x00, 0xdc
+};
+
+static const unsigned char GAMMA_60[] = {
+ MCS_MTP_SET3,
+ 0x00, 0x00, 0x00, 0x65, 0x7b, 0x7d, 0x5f, 0x67, 0x68, 0x2a, 0x28, 0x29,
+ 0x28, 0x2a, 0x27, 0x31, 0x2f, 0x30, 0x34, 0x33, 0x34, 0x00, 0xd9, 0x00,
+ 0xe4, 0x00, 0xf5
+};
+
+static const unsigned char GAMMA_90[] = {
+ MCS_MTP_SET3,
+ 0x00, 0x00, 0x00, 0x4d, 0x6f, 0x71, 0x67, 0x6a, 0x6c, 0x29, 0x28, 0x28,
+ 0x28, 0x29, 0x27, 0x30, 0x2e, 0x30, 0x32, 0x31, 0x31, 0x00, 0xea, 0x00,
+ 0xf6, 0x01, 0x09
+};
+
+static const unsigned char GAMMA_120[] = {
+ MCS_MTP_SET3,
+ 0x00, 0x00, 0x00, 0x3d, 0x66, 0x68, 0x69, 0x69, 0x69, 0x28, 0x28, 0x27,
+ 0x28, 0x28, 0x27, 0x30, 0x2e, 0x2f, 0x31, 0x31, 0x30, 0x00, 0xf9, 0x01,
+ 0x05, 0x01, 0x1b
+};
+
+static const unsigned char GAMMA_150[] = {
+ MCS_MTP_SET3,
+ 0x00, 0x00, 0x00, 0x31, 0x51, 0x53, 0x66, 0x66, 0x67, 0x28, 0x29, 0x27,
+ 0x28, 0x27, 0x27, 0x2e, 0x2d, 0x2e, 0x31, 0x31, 0x30, 0x01, 0x04, 0x01,
+ 0x11, 0x01, 0x29
+};
+
+static const unsigned char GAMMA_200[] = {
+ MCS_MTP_SET3,
+ 0x00, 0x00, 0x00, 0x2f, 0x4f, 0x51, 0x67, 0x65, 0x65, 0x29, 0x2a, 0x28,
+ 0x27, 0x25, 0x26, 0x2d, 0x2c, 0x2c, 0x30, 0x30, 0x30, 0x01, 0x14, 0x01,
+ 0x23, 0x01, 0x3b
+};
+
+static const unsigned char GAMMA_240[] = {
+ MCS_MTP_SET3,
+ 0x00, 0x00, 0x00, 0x2c, 0x4d, 0x50, 0x65, 0x63, 0x64, 0x2a, 0x2c, 0x29,
+ 0x26, 0x24, 0x25, 0x2c, 0x2b, 0x2b, 0x30, 0x30, 0x30, 0x01, 0x1e, 0x01,
+ 0x2f, 0x01, 0x47
+};
+
+static const unsigned char GAMMA_300[] = {
+ MCS_MTP_SET3,
+ 0x00, 0x00, 0x00, 0x38, 0x61, 0x64, 0x65, 0x63, 0x64, 0x28, 0x2a, 0x27,
+ 0x26, 0x23, 0x25, 0x2b, 0x2b, 0x2a, 0x30, 0x2f, 0x30, 0x01, 0x2d, 0x01,
+ 0x3f, 0x01, 0x57
+};
+
+static const unsigned char *gamma_tbl[MAX_GAMMA_CNT] = {
+ GAMMA_10,
+ GAMMA_30,
+ GAMMA_60,
+ GAMMA_90,
+ GAMMA_120,
+ GAMMA_150,
+ GAMMA_200,
+ GAMMA_200,
+ GAMMA_240,
+ GAMMA_300,
+ GAMMA_300
+};
+
static inline struct s6e63j0x03 *panel_to_s6e63j0x03(struct drm_panel *panel)
{
return container_of(panel, struct s6e63j0x03, panel);
@@ -201,6 +290,14 @@ static void s6e63j0x03_test_level_2_key_off(struct s6e63j0x03 *ctx)
s6e63j0x03_dcs_write_seq_static(ctx, 0xf1, 0xa5, 0xa5);
}
+static void s6e63j0x03_apply_mtp_key(struct s6e63j0x03 *ctx, bool on)
+{
+ if (on)
+ s6e63j0x03_dcs_write_seq(ctx, MCS_MTP_KEY, 0x5a, 0x5a);
+ else
+ s6e63j0x03_dcs_write_seq(ctx, MCS_MTP_KEY, 0xa5, 0xa5);
+}
+
static void s6e63j0x03_set_maximum_return_packet_size(struct s6e63j0x03 *ctx,
unsigned int size)
{
@@ -312,6 +409,76 @@ static int s6e63j0x03_power_off(struct s6e63j0x03 *ctx)
return 0;
}
+static int s6e63j0x03_get_brightness(struct backlight_device *bl_dev)
+{
+ return bl_dev->props.brightness;
+}
+
+static int s6e63j0x03_get_brightness_index(unsigned int brightness)
+{
+ int index;
+
+ switch (brightness) {
+ case 0 ... 20:
+ index = 0;
+ break;
+ case 21 ... 40:
+ index = 2;
+ break;
+ case 41 ... 60:
+ index = 4;
+ break;
+ case 61 ... 80:
+ index = 6;
+ break;
+ default:
+ index = 10;
+ break;
+ }
+
+ return index;
+}
+
+static void s6e63j0x03_update_gamma(struct s6e63j0x03 *ctx,
+ unsigned int brightness)
+{
+ int index = s6e63j0x03_get_brightness_index(brightness);
+
+ s6e63j0x03_apply_mtp_key(ctx, true);
+
+ s6e63j0x03_dcs_write(ctx, gamma_tbl[index], GAMMA_CMD_CNT);
+
+ s6e63j0x03_apply_mtp_key(ctx, false);
+}
+
+static int s6e63j0x03_set_brightness(struct backlight_device *bl_dev)
+{
+ struct s6e63j0x03 *ctx = (struct s6e63j0x03 *)bl_get_data(bl_dev);
+ unsigned int brightness = bl_dev->props.brightness;
+
+ if (brightness < MIN_BRIGHTNESS ||
+ brightness > bl_dev->props.max_brightness) {
+ dev_err(ctx->dev, "brightness[%u] is invalid value\n",
+ brightness);
+ return -EINVAL;
+ }
+
+ if (ctx->power > FB_BLANK_UNBLANK) {
+ dev_err(ctx->dev, "panel is not in fb unblank state\n");
+ return -EPERM;
+ }
+
+ s6e63j0x03_update_gamma(ctx, brightness);
+
+ return 0;
+}
+
+static const struct backlight_ops s6e63j0x03_bl_ops = {
+ .get_brightness = s6e63j0x03_get_brightness,
+ .update_status = s6e63j0x03_set_brightness,
+};
+
+
static int s6e63j0x03_disable(struct drm_panel *panel)
{
struct s6e63j0x03 *ctx = panel_to_s6e63j0x03(panel);
@@ -480,20 +647,36 @@ static int s6e63j0x03_probe(struct mipi_dsi_device *dsi)
return ret;
}
- ctx->brightness = GAMMA_LEVEL_NUM - 1;
-
drm_panel_init(&ctx->panel);
ctx->panel.dev = dev;
ctx->panel.funcs = &s6e63j0x03_drm_funcs;
+ ctx->bl_dev = backlight_device_register("s6e63j0x03", dev, ctx,
+ &s6e63j0x03_bl_ops, NULL);
+ if (IS_ERR(ctx->bl_dev)) {
+ dev_err(dev, "failed to register backlight device\n");
+ return PTR_ERR(ctx->bl_dev);
+ }
+
+ ctx->bl_dev->props.max_brightness = MAX_BRIGHTNESS;
+ ctx->bl_dev->props.brightness = DEFAULT_BRIGHTNESS;
+
ret = drm_panel_add(&ctx->panel);
if (ret < 0)
- return ret;
+ goto err_unregister_backlight;
ret = mipi_dsi_attach(dsi);
if (ret < 0)
+ goto err_remove_panel;
+
+ return ret;
+
+err_remove_panel:
drm_panel_remove(&ctx->panel);
+err_unregister_backlight:
+ backlight_device_unregister(ctx->bl_dev);
+
return ret;
}
@@ -504,6 +687,8 @@ static int s6e63j0x03_remove(struct mipi_dsi_device *dsi)
mipi_dsi_detach(dsi);
drm_panel_remove(&ctx->panel);
+ backlight_device_unregister(ctx->bl_dev);
+
return 0;
}