From 50d652bdf76a06029eae4f2eac82cde58428024a Mon Sep 17 00:00:00 2001 From: Wyon Bi Date: Tue, 14 Sep 2021 17:59:44 +0800 Subject: [PATCH] drm/bridge: analogix_dp: Fix display corruption in low temperature environment Change-Id: I46b3dbc57c1f2b8482559d4ba44bd7f339657ccd Signed-off-by: Wyon Bi --- drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c | 3 ++- drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h | 1 + 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c index f53d8283f297..a3d561f769cd 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c @@ -95,10 +95,11 @@ void analogix_dp_init_analog_param(struct analogix_dp_device *dp) reg ^= REF_CLK_MASK; analogix_dp_write(dp, ANALOGIX_DP_PLL_REG_1, reg); - analogix_dp_write(dp, ANALOGIX_DP_PLL_REG_2, 0x95); + analogix_dp_write(dp, ANALOGIX_DP_PLL_REG_2, 0x99); analogix_dp_write(dp, ANALOGIX_DP_PLL_REG_3, 0x40); analogix_dp_write(dp, ANALOGIX_DP_PLL_REG_4, 0x58); analogix_dp_write(dp, ANALOGIX_DP_PLL_REG_5, 0x22); + analogix_dp_write(dp, ANALOGIX_DP_BIAS, 0x44); } reg = DRIVE_DVDD_BIT_1_0625V | VCO_BIT_600_MICRO; diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h index a3dc6d4fe34b..df88f1ad0883 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h @@ -46,6 +46,7 @@ #define ANALOGIX_DP_PLL_REG_5 0xa00 #define ANALOIGX_DP_SSC_REG 0x104 +#define ANALOGIX_DP_BIAS 0x124 #define ANALOGIX_DP_PD 0x12c #define ANALOGIX_DP_IF_TYPE 0x244