[12/13] drm/i915: Turn off pipe CSC when it's not needed

Submitted by Ville Syrjälä on Jan. 11, 2019, 5:08 p.m.

Details

Message ID 20190111170823.4441-13-ville.syrjala@linux.intel.com
State New
Series "Enable/disable gamma/csc dynamically and fix C8"
Headers show

Commit Message

Ville Syrjälä Jan. 11, 2019, 5:08 p.m.
From: Ville Syrjälä <ville.syrjala@linux.intel.com>

As with pipe gamma we can avoid the potential precision loss from
the pipe csc unit when there is no need to use it. And again
we need the same logic for updating the planes.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/intel_color.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

Patch hide | download patch | download mbox

diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c
index a8b7428a64bf..789b04bb51d2 100644
--- a/drivers/gpu/drm/i915/intel_color.c
+++ b/drivers/gpu/drm/i915/intel_color.c
@@ -659,7 +659,8 @@  intel_color_add_affected_planes(struct intel_crtc_state *new_crtc_state)
 		intel_atomic_get_old_crtc_state(state, crtc);
 	struct intel_plane *plane;
 
-	if (new_crtc_state->gamma_enable == old_crtc_state->gamma_enable)
+	if (new_crtc_state->gamma_enable == old_crtc_state->gamma_enable &&
+	    new_crtc_state->csc_enable == old_crtc_state->csc_enable)
 		return 0;
 
 	for_each_intel_plane_on_crtc(&dev_priv->drm, crtc, plane) {
@@ -684,6 +685,7 @@  int intel_color_check(struct intel_crtc_state *crtc_state)
 	const struct drm_property_blob *gamma_lut = crtc_state->base.gamma_lut;
 	const struct drm_property_blob *degamma_lut = crtc_state->base.degamma_lut;
 	size_t gamma_length, degamma_length;
+	bool limited_color_range = false;
 	int ret;
 
 	degamma_length = INTEL_INFO(dev_priv)->color.degamma_lut_size;
@@ -693,7 +695,11 @@  int intel_color_check(struct intel_crtc_state *crtc_state)
 
 	if (INTEL_GEN(dev_priv) >= 9 ||
 	    IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv))
-		crtc_state->csc_enable = true;
+		limited_color_range = crtc_state->limited_color_range;
+
+	crtc_state->csc_enable =
+		crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB ||
+		crtc_state->base.ctm || limited_color_range;
 
 	ret = intel_color_add_affected_planes(crtc_state);
 	if (ret)