[PATCH v3 07/29] drm/i915/xe3p_lpd: Remove gamma,csc bottom color checks

[Gustavo Sousa <gustavo.sousa@intel.com>]

From: Sai Teja Pottumuttu <sai.teja.pottumuttu@intel.com>

With Xe3p_LPD, the SKL_BOTTOM_COLOR_GAMMA_ENABLE and
SKL_BOTTOM_COLOR_CSC_ENABLE bits are being removed. Thus, we need not
set gamma_enable nor csc_enable in crtc_state.

Note that GAMMA_MODE.POST_CSC_GAMMA_ENABLE and CSC_MODE.ICL_CSC_ENABLE
are the documented alternatives for the bottom color bits being removed.
But as these suggested bits are being checked in state checker as part
of gamma_mode, csc_mode fields and as gamma_enable/csc_enable are not
being used anywhere else functionally post ICL, we need not set these
fields in crtc_state.

Bspec: 69734
Signed-off-by: Sai Teja Pottumuttu <sai.teja.pottumuttu@intel.com>
Reviewed-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
Signed-off-by: Gustavo Sousa <gustavo.sousa@intel.com>
---
 drivers/gpu/drm/i915/display/intel_color.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
index 1e97020e7304..a217a67ceb43 100644
--- a/drivers/gpu/drm/i915/display/intel_color.c
+++ b/drivers/gpu/drm/i915/display/intel_color.c
@@ -1090,18 +1090,19 @@ static void skl_get_config(struct intel_crtc_state *crtc_state)
 {
 	struct intel_display *display = to_intel_display(crtc_state);
 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
-	u32 tmp;
 
 	crtc_state->gamma_mode = hsw_read_gamma_mode(crtc);
 	crtc_state->csc_mode = ilk_read_csc_mode(crtc);
 
-	tmp = intel_de_read(display, SKL_BOTTOM_COLOR(crtc->pipe));
+	if (DISPLAY_VER(display) < 35) {
+		u32 tmp = intel_de_read(display, SKL_BOTTOM_COLOR(crtc->pipe));
 
-	if (tmp & SKL_BOTTOM_COLOR_GAMMA_ENABLE)
-		crtc_state->gamma_enable = true;
+		if (tmp & SKL_BOTTOM_COLOR_GAMMA_ENABLE)
+			crtc_state->gamma_enable = true;
 
-	if (tmp & SKL_BOTTOM_COLOR_CSC_ENABLE)
-		crtc_state->csc_enable = true;
+		if (tmp & SKL_BOTTOM_COLOR_CSC_ENABLE)
+			crtc_state->csc_enable = true;
+	}
 }
 
 static void skl_color_commit_arm(struct intel_dsb *dsb,

-- 
2.51.0