On Tue, Mar 19, 2019 at 02:59:38PM -0700, Matt Roper wrote:
> On Mon, Mar 18, 2019 at 06:13:08PM +0200, Ville Syrjala wrote:
> > From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> >
> > In prepartion for per-platform color_check() functions extract the
> > common code into a separate function.
> >
> > Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> > ---
> > 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..b6a992a5b14f 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 needs the legacy LUT all to itself */
> > + if (crtc_state->c8_planes)
> > + return -EINVAL;
>
> Do we need to test for non-NULL gamma_lut here?
For c8? We already checked crtc_state_is_legacy_gamma() above.
>
> The logic is the same as before your patch, so either we already had a
> pre-existing bug or, more likely, I'm overlooking something obvious.
>
> > +
> > + 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;
>
> Should we drop the GAMMA_ENABLE here and just rely on the new check
> you're adding below to handle it?
This will get rewritten entirely in following patches, so I figured I'd
just keep this patch minimal.
>
>
> Matt
>
> > @@ -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;
> > --
> > 2.19.2
> >
>
> --
> Matt Roper
> Graphics Software Engineer
> IoTG Platform Enabling & Development
> Intel Corporation
> (916) 356-2795
--
Ville Syrjälä
Intel
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