drm/msm/disp/dpu1: enable DATA_HCTL_EN for sc7280 target

The reset value of INTF_CONFIG2 register is changed
for SC7280 family. Changes are added to program
this register correctly based on the target.

DATA_HCTL_EN in INTF_CONFIG2 register allows data
to be transferred at a different rate than video
timing. When this is set, the number of data per
line follows DISPLAY_DATA_HCTL register value.
This change adds support to program these
registers for sc7280 target.
Signed-off-by: Krishna Manikandan <mkrishn@codeaurora.org>
Link: https://lore.kernel.org/r/1617685792-14376-5-git-send-email-mkrishn@codeaurora.orgSigned-off-by: Rob Clark <robdclark@chromium.org>

drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c

@@ -31,6 +31,8 @@
 #define INTF_TEST_CTL                   0x054
 #define INTF_TP_COLOR0                  0x058
 #define INTF_TP_COLOR1                  0x05C
+#define INTF_CONFIG2                    0x060
+#define INTF_DISPLAY_DATA_HCTL          0x064
 #define INTF_FRAME_LINE_COUNT_EN        0x0A8
 #define INTF_FRAME_COUNT                0x0AC
 #define   INTF_LINE_COUNT               0x0B0
@@ -93,7 +95,7 @@ static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *ctx,
 	u32 active_hctl, display_hctl, hsync_ctl;
 	u32 polarity_ctl, den_polarity, hsync_polarity, vsync_polarity;
 	u32 panel_format;
-	u32 intf_cfg;
+	u32 intf_cfg, intf_cfg2 = 0, display_data_hctl = 0;
 
 	/* read interface_cfg */
 	intf_cfg = DPU_REG_READ(c, INTF_CONFIG);
@@ -178,6 +180,13 @@ static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *ctx,
 				(COLOR_8BIT << 4) |
 				(0x21 << 8));
 
+	if (ctx->cap->features & BIT(DPU_DATA_HCTL_EN)) {
+		intf_cfg2 |= BIT(4);
+		display_data_hctl = display_hctl;
+		DPU_REG_WRITE(c, INTF_CONFIG2, intf_cfg2);
+		DPU_REG_WRITE(c, INTF_DISPLAY_DATA_HCTL, display_data_hctl);
+	}
+
 	DPU_REG_WRITE(c, INTF_HSYNC_CTL, hsync_ctl);
 	DPU_REG_WRITE(c, INTF_VSYNC_PERIOD_F0, vsync_period * hsync_period);
 	DPU_REG_WRITE(c, INTF_VSYNC_PULSE_WIDTH_F0,