drm/amd/display: Fix HDMI scaling corruption issue.

Signed-off-by: Zeyu Fan <Zeyu.Fan@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dce/dce_transform.c

@@ -83,6 +83,8 @@ static bool setup_scaling_configuration(
 	struct dce_transform *xfm_dce,
 	const struct scaler_data *data)
 {
+	REG_SET(SCL_BYPASS_CONTROL, 0, SCL_BYPASS_MODE, 0);
+
 	if (data->taps.h_taps + data->taps.v_taps <= 2) {
 		/* Set bypass */
 		REG_UPDATE_2(SCL_MODE, SCL_MODE, 0, SCL_PSCL_EN, 0);
@@ -285,6 +287,9 @@ static void dce_transform_set_scaler(
 			LB_MEMORY_CONFIG, 0,
 			LB_MEMORY_SIZE, xfm_dce->lb_memory_size);
 
+	/* Clear SCL_F_SHARP_CONTROL value to 0 */
+	REG_WRITE(SCL_F_SHARP_CONTROL, 0);
+
 	/* 1. Program overscan */
 	program_overscan(xfm_dce, data);
 

drivers/gpu/drm/amd/display/dc/dce/dce_transform.h

@@ -53,6 +53,7 @@
 	SRI(SCL_MODE, SCL, id), \
 	SRI(SCL_TAP_CONTROL, SCL, id), \
 	SRI(SCL_CONTROL, SCL, id), \
+	SRI(SCL_BYPASS_CONTROL, SCL, id), \
 	SRI(EXT_OVERSCAN_LEFT_RIGHT, SCL, id), \
 	SRI(EXT_OVERSCAN_TOP_BOTTOM, SCL, id), \
 	SRI(SCL_VERT_FILTER_CONTROL, SCL, id), \
@@ -67,7 +68,8 @@
 	SRI(SCL_VERT_FILTER_INIT, SCL, id), \
 	SRI(SCL_AUTOMATIC_MODE_CONTROL, SCL, id), \
 	SRI(LB_MEMORY_CTRL, LB, id), \
-	SRI(SCL_UPDATE, SCL, id)
+	SRI(SCL_UPDATE, SCL, id), \
+	SRI(SCL_F_SHARP_CONTROL, SCL, id)
 
 #define XFM_COMMON_REG_LIST_DCE100(id) \
 	XFM_COMMON_REG_LIST_DCE_BASE(id), \
@@ -116,6 +118,7 @@
 	XFM_SF(SCL_TAP_CONTROL, SCL_H_NUM_OF_TAPS, mask_sh), \
 	XFM_SF(SCL_TAP_CONTROL, SCL_V_NUM_OF_TAPS, mask_sh), \
 	XFM_SF(SCL_CONTROL, SCL_BOUNDARY_MODE, mask_sh), \
+	XFM_SF(SCL_BYPASS_CONTROL, SCL_BYPASS_MODE, mask_sh), \
 	XFM_SF(EXT_OVERSCAN_LEFT_RIGHT, EXT_OVERSCAN_LEFT, mask_sh), \
 	XFM_SF(EXT_OVERSCAN_LEFT_RIGHT, EXT_OVERSCAN_RIGHT, mask_sh), \
 	XFM_SF(EXT_OVERSCAN_TOP_BOTTOM, EXT_OVERSCAN_TOP, mask_sh), \
@@ -181,6 +184,7 @@
 	type GAMUT_REMAP_C34; \
 	type GRPH_GAMUT_REMAP_MODE; \
 	type SCL_MODE; \
+	type SCL_BYPASS_MODE; \
 	type SCL_PSCL_EN; \
 	type SCL_H_NUM_OF_TAPS; \
 	type SCL_V_NUM_OF_TAPS; \
@@ -241,6 +245,7 @@ struct dce_transform_registers {
 	uint32_t SCL_MODE;
 	uint32_t SCL_TAP_CONTROL;
 	uint32_t SCL_CONTROL;
+	uint32_t SCL_BYPASS_CONTROL;
 	uint32_t EXT_OVERSCAN_LEFT_RIGHT;
 	uint32_t EXT_OVERSCAN_TOP_BOTTOM;
 	uint32_t SCL_VERT_FILTER_CONTROL;
@@ -258,6 +263,7 @@ struct dce_transform_registers {
 	uint32_t SCL_AUTOMATIC_MODE_CONTROL;
 	uint32_t LB_MEMORY_CTRL;
 	uint32_t SCL_UPDATE;
+	uint32_t SCL_F_SHARP_CONTROL;
 };
 
 struct init_int_and_frac {