[v5 10/14] drm/i915/color: Extract HDR pre-CSC LUT programming to helper function

From: Pranay Samala <[email protected]>

As we prepare to add support for LUT programming in SDR planes,
refactor HDR plane pre-CSC LUT programming to a helper.

Signed-off-by: Pranay Samala <[email protected]>
Signed-off-by: Chaitanya Kumar Borah <[email protected]>
Reviewed-by: Uma Shankar <[email protected]>
---
 drivers/gpu/drm/i915/display/intel_color.c | 30 ++++++++++++++--------
 1 file changed, 20 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
index 87ced9f6ff40..2a32ab62721c 100644
--- a/drivers/gpu/drm/i915/display/intel_color.c
+++ b/drivers/gpu/drm/i915/display/intel_color.c
@@ -3959,20 +3959,15 @@ xelpd_load_plane_csc_matrix(struct intel_dsb *dsb,
 }
 
 static void
-xelpd_program_plane_pre_csc_lut(struct intel_dsb *dsb,
-				const struct intel_plane_state *plane_state)
+xelpd_load_hdr_pre_csc_lut(struct intel_display *display,
+			   struct intel_dsb *dsb,
+			   enum pipe pipe,
+			   enum plane_id plane,
+			   const struct drm_color_lut32 *pre_csc_lut)
 {
-	struct intel_display *display = to_intel_display(plane_state);
-	const struct drm_plane_state *state = &plane_state->uapi;
-	enum pipe pipe = to_intel_plane(state->plane)->pipe;
-	enum plane_id plane = to_intel_plane(state->plane)->id;
-	const struct drm_color_lut32 *pre_csc_lut = plane_state->hw.degamma_lut->data;
 	int i, lut_size = 128;
 	u32 lut_val;
 
-	if (!icl_is_hdr_plane(display, plane))
-		return;
-
 	intel_de_write_dsb(display, dsb,
 			   PLANE_PRE_CSC_GAMC_INDEX_ENH(pipe, plane, 0),
 			   PLANE_PAL_PREC_AUTO_INCREMENT);
@@ -3997,6 +3992,21 @@ xelpd_program_plane_pre_csc_lut(struct intel_dsb *dsb,
 	intel_de_write_dsb(display, dsb, PLANE_PRE_CSC_GAMC_INDEX_ENH(pipe, plane, 0), 0);
 }
 
+static void
+xelpd_program_plane_pre_csc_lut(struct intel_dsb *dsb,
+				const struct intel_plane_state *plane_state)
+{
+	struct intel_display *display = to_intel_display(plane_state);
+	const struct drm_plane_state *state = &plane_state->uapi;
+	enum pipe pipe = to_intel_plane(state->plane)->pipe;
+	enum plane_id plane = to_intel_plane(state->plane)->id;
+	const struct drm_color_lut32 *pre_csc_lut = plane_state->hw.degamma_lut ?
+			plane_state->hw.degamma_lut->data : NULL;
+
+	if (icl_is_hdr_plane(display, plane))
+		xelpd_load_hdr_pre_csc_lut(display, dsb, pipe, plane, pre_csc_lut);
+}
+
 static void
 xelpd_program_plane_post_csc_lut(struct intel_dsb *dsb,
 				 const struct intel_plane_state *plane_state)
-- 
2.25.1