drm/i915: Split icl_color_commit_noarm() from skl_color_commit_noarm()

We're going to want different behavior for skl/glk vs. icl
in .color_commit_noarm(), so split the hook into two. Arguably
we already had slightly different behaviour since
csc_enable/gamma_enable are never set on icl+, so the old
code was perhaps a bit confusing as well.

Cc: <stable@vger.kernel.org> #v5.19+
Cc: Manasi Navare <navaremanasi@google.com>
Cc: Drew Davenport <ddavenport@chromium.org>
Cc: Imre Deak <imre.deak@intel.com>
Cc: Jouni Högander <jouni.hogander@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230320095438.17328-2-ville.syrjala@linux.intel.com
Reviewed-by: Imre Deak <imre.deak@intel.com>
(cherry picked from commit f161eb01f50ab31f2084975b43bce54b7b671e17)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
index 8d97c29..ce2c381 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_color.c
+++ b/drivers/gpu/drm/i915/display/intel_color.c
@@ -677,6 +677,25 @@ static void skl_color_commit_arm(const struct intel_crtc_state *crtc_state)
                          crtc_state->csc_mode);
 }
 
+static void icl_color_commit_arm(const struct intel_crtc_state *crtc_state)
+{
+       struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+       struct drm_i915_private *i915 = to_i915(crtc->base.dev);
+       enum pipe pipe = crtc->pipe;
+
+       /*
+        * We don't (yet) allow userspace to control the pipe background color,
+        * so force it to black.
+        */
+       intel_de_write(i915, SKL_BOTTOM_COLOR(pipe), 0);
+
+       intel_de_write(i915, GAMMA_MODE(crtc->pipe),
+                      crtc_state->gamma_mode);
+
+       intel_de_write_fw(i915, PIPE_CSC_MODE(crtc->pipe),
+                         crtc_state->csc_mode);
+}
+
 static struct drm_property_blob *
 create_linear_lut(struct drm_i915_private *i915, int lut_size)
 {
@@ -3067,7 +3086,7 @@ static const struct intel_color_funcs i9xx_color_funcs = {
 static const struct intel_color_funcs icl_color_funcs = {
        .color_check = icl_color_check,
        .color_commit_noarm = icl_color_commit_noarm,
-       .color_commit_arm = skl_color_commit_arm,
+       .color_commit_arm = icl_color_commit_arm,
        .load_luts = icl_load_luts,
        .read_luts = icl_read_luts,
        .lut_equal = icl_lut_equal,