[Intel-gfx] [v6][PATCH 01/12] drm/i915: Introduce vfunc read_luts() to create hw lut

[Swati Sharma]

In this patch, a vfunc read_luts() is introduced to create a hw lut
i.e. lut having values read from gamma/degamma registers which will
later be used to compare with sw lut to validate gamma/degamma lut values.

v3: -Rebase
v4: -Renamed intel_get_color_config to intel_color_get_config [Jani]
    -Wrapped get_color_config() [Jani]
v5: -Renamed intel_color_get_config() to intel_color_read_luts()
    -Renamed get_color_config to read_luts
v6: -Renamed intel_color_read_luts() back to intel_color_get_config()
     [Jani and Ville]

Signed-off-by: Swati Sharma <swati2.sharma at intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h    | 1 +
 drivers/gpu/drm/i915/intel_color.c | 8 ++++++++
 drivers/gpu/drm/i915/intel_color.h | 1 +
 3 files changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index d025780..6343e70 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -343,6 +343,7 @@ struct drm_i915_display_funcs {
 	 * involved with the same commit.
 	 */
 	void (*load_luts)(const struct intel_crtc_state *crtc_state);
+	void (*read_luts)(struct intel_crtc_state *crtc_state);
 };
 
 struct intel_csr {
diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c
index 962db12..50b98ee 100644
--- a/drivers/gpu/drm/i915/intel_color.c
+++ b/drivers/gpu/drm/i915/intel_color.c
@@ -879,6 +879,14 @@ int intel_color_check(struct intel_crtc_state *crtc_state)
 	return dev_priv->display.color_check(crtc_state);
 }
 
+void intel_color_get_config(struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
+
+	if (dev_priv->display.read_luts)
+		dev_priv->display.read_luts(crtc_state);
+}
+
 static bool need_plane_update(struct intel_plane *plane,
 			      const struct intel_crtc_state *crtc_state)
 {
diff --git a/drivers/gpu/drm/i915/intel_color.h b/drivers/gpu/drm/i915/intel_color.h
index b8a3ce6..057e8ac 100644
--- a/drivers/gpu/drm/i915/intel_color.h
+++ b/drivers/gpu/drm/i915/intel_color.h
@@ -13,5 +13,6 @@
 int intel_color_check(struct intel_crtc_state *crtc_state);
 void intel_color_commit(const struct intel_crtc_state *crtc_state);
 void intel_color_load_luts(const struct intel_crtc_state *crtc_state);
+void intel_color_get_config(struct intel_crtc_state *crtc_state);
 
 #endif /* __INTEL_COLOR_H__ */
-- 
1.9.1