diff options
Diffstat (limited to 'src/drivers/ti/sn65dsi86bridge/sn65dsi86bridge.c')
| -rw-r--r-- | src/drivers/ti/sn65dsi86bridge/sn65dsi86bridge.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/drivers/ti/sn65dsi86bridge/sn65dsi86bridge.c b/src/drivers/ti/sn65dsi86bridge/sn65dsi86bridge.c index 1cbf6fd97d..2ba0977547 100644 --- a/src/drivers/ti/sn65dsi86bridge/sn65dsi86bridge.c +++ b/src/drivers/ti/sn65dsi86bridge/sn65dsi86bridge.c @@ -31,6 +31,14 @@ #define DP_MAX_SUPPORTED_RATES 8 /* 16-bit little-endian */ #define DP_LANE_COUNT_MASK 0xf +/* Backlight configuration */ +#define DP_BACKLIGHT_MODE_SET 0x721 +#define DP_BACKLIGHT_CONTROL_MODE_MASK 0x3 +#define DP_BACKLIGHT_CONTROL_MODE_DPCD 0x2 +#define DP_DISPLAY_CONTROL_REGISTER 0x720 +#define DP_BACKLIGHT_ENABLE 0x1 +#define DP_BACKLIGHT_BRIGHTNESS_MSB 0x722 + /* link configuration */ #define DP_LINK_BW_SET 0x100 #define DP_LINK_BW_1_62 0x06 @@ -497,6 +505,20 @@ static void sn65dsi86_bridge_link_training(uint8_t bus, uint8_t chip) printk(BIOS_ERR, "ERROR: Link training failed 10 times\n"); } +void sn65dsi86_backlight_enable(uint8_t bus, uint8_t chip) +{ + uint8_t val = DP_BACKLIGHT_CONTROL_MODE_DPCD; + sn65dsi86_bridge_aux_request(bus, chip, DP_BACKLIGHT_MODE_SET, 1, DPCD_WRITE, &val); + + val = 0xff; + sn65dsi86_bridge_aux_request(bus, chip, DP_BACKLIGHT_BRIGHTNESS_MSB, 1, + DPCD_WRITE, &val); + + val = DP_BACKLIGHT_ENABLE; + sn65dsi86_bridge_aux_request(bus, chip, DP_DISPLAY_CONTROL_REGISTER, 1, + DPCD_WRITE, &val); +} + static void sn65dsi86_bridge_assr_config(uint8_t bus, uint8_t chip, int enable) { if (enable) |