[PATCH v2 01/10] drm/i915: Extract check_luts()

Ville Syrjala
2019-03-27T15:50:52Z

In prepartion for per-platform color_check() functions extract the
common code into a separate function.

v2: Improve the C8 comment (Matt)

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
---
drivers/gpu/drm/i915/intel_color.c | 68 ++++++++++++++++++------------
1 file changed, 40 insertions(+), 28 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c
index 467fd1a1630c..5d1bf68646b4 100644
--- a/drivers/gpu/drm/i915/intel_color.c
+++ b/drivers/gpu/drm/i915/intel_color.c
@@ -771,6 +771,38 @@ static int check_lut_size(const struct drm_property_blob *lut, int expected)
return 0;
}

+static int check_luts(const struct intel_crtc_state *crtc_state)
+{
+ struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
+ const struct drm_property_blob *gamma_lut = crtc_state->base.gamma_lut;
+ const struct drm_property_blob *degamma_lut = crtc_state->base.degamma_lut;
+ int gamma_length, degamma_length;
+ u32 gamma_tests, degamma_tests;
+
+ /* Always allow legacy gamma LUT with no further checking. */
+ if (crtc_state_is_legacy_gamma(crtc_state))
+ return 0;
+
+ /* C8 relies on its palette being stored in the legacy LUT */
+ if (crtc_state->c8_planes)
+ return -EINVAL;
+
+ degamma_length = INTEL_INFO(dev_priv)->color.degamma_lut_size;
+ gamma_length = INTEL_INFO(dev_priv)->color.gamma_lut_size;
+ degamma_tests = INTEL_INFO(dev_priv)->color.degamma_lut_tests;
+ gamma_tests = INTEL_INFO(dev_priv)->color.gamma_lut_tests;
+
+ if (check_lut_size(degamma_lut, degamma_length) ||
+ check_lut_size(gamma_lut, gamma_length))
+ return -EINVAL;
+
+ if (drm_color_lut_check(degamma_lut, degamma_tests) ||
+ drm_color_lut_check(gamma_lut, gamma_tests))
+ return -EINVAL;
+
+ return 0;
+}
+
static u32 chv_cgm_mode(const struct intel_crtc_state *crtc_state)
{
u32 cgm_mode = 0;
@@ -794,19 +826,11 @@ 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;
bool limited_color_range = false;
- int gamma_length, degamma_length;
- u32 gamma_tests, degamma_tests;
int ret;

- degamma_length = INTEL_INFO(dev_priv)->color.degamma_lut_size;
- gamma_length = INTEL_INFO(dev_priv)->color.gamma_lut_size;
- degamma_tests = INTEL_INFO(dev_priv)->color.degamma_lut_tests;
- gamma_tests = INTEL_INFO(dev_priv)->color.gamma_lut_tests;
-
- /* C8 needs the legacy LUT all to itself */
- if (crtc_state->c8_planes &&
- !crtc_state_is_legacy_gamma(crtc_state))
- return -EINVAL;
+ ret = check_luts(crtc_state);
+ if (ret)
+ return ret;

crtc_state->gamma_enable = (gamma_lut || degamma_lut) &&
!crtc_state->c8_planes;
@@ -828,25 +852,10 @@ int intel_color_check(struct intel_crtc_state *crtc_state)
if (IS_CHERRYVIEW(dev_priv))
crtc_state->cgm_mode = chv_cgm_mode(crtc_state);

- /* Always allow legacy gamma LUT with no further checking. */
if (!crtc_state->gamma_enable ||
- crtc_state_is_legacy_gamma(crtc_state)) {
+ crtc_state_is_legacy_gamma(crtc_state))
crtc_state->gamma_mode = GAMMA_MODE_MODE_8BIT;
- if (INTEL_GEN(dev_priv) >= 11 &&
- crtc_state->gamma_enable)
- crtc_state->gamma_mode |= POST_CSC_GAMMA_ENABLE;
- return 0;
- }
-
- if (check_lut_size(degamma_lut, degamma_length) ||
- check_lut_size(gamma_lut, gamma_length))
- return -EINVAL;
-
- if (drm_color_lut_check(degamma_lut, degamma_tests) ||
- drm_color_lut_check(gamma_lut, gamma_tests))
- return -EINVAL;
-
- if (INTEL_GEN(dev_priv) >= 11)
+ else if (INTEL_GEN(dev_priv) >= 11)
crtc_state->gamma_mode = GAMMA_MODE_MODE_10BIT |
PRE_CSC_GAMMA_ENABLE |
POST_CSC_GAMMA_ENABLE;
@@ -858,6 +867,9 @@ int intel_color_check(struct intel_crtc_state *crtc_state)
crtc_state->gamma_mode = GAMMA_MODE_MODE_8BIT;

if (INTEL_GEN(dev_priv) >= 11) {
+ if (crtc_state->gamma_enable)
+ crtc_state->gamma_mode |= POST_CSC_GAMMA_ENABLE;
+
if (crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB ||
crtc_state->limited_color_range)
crtc_state->csc_mode |= ICL_OUTPUT_CSC_ENABLE;