[Intel-gfx] [v7][PATCH 03/12] drm/i915: Add func to compare hw/sw gamma lut
Ville Syrjälä
ville.syrjala at linux.intel.com
Mon Jun 10 17:03:46 UTC 2019
On Mon, Jun 10, 2019 at 04:24:54PM +0530, Sharma, Swati2 wrote:
> On 31-May-19 8:58 PM, Ville Syrjälä wrote:
>
> > On Wed, May 29, 2019 at 03:20:53PM +0530, Swati Sharma wrote:
> >> v3: -Rebase
> >> v4: -Renamed intel_compare_color_lut() to intel_color_lut_equal() [Jani]
> >> -Added the default label above the correct label [Jani]
> >> -Corrected smatch warn "variable dereferenced before check"
> >> [Dan Carpenter]
> >> v5: -Added condition (!blob1 && !blob2) return true [Jani]
> >> -Called PIPE_CONF_CHECK_COLOR_LUT inside if (!adjust) [Jani]
> >> -Added #undef PIPE_CONF_CHECK_COLOR_LUT [Jani]
> >> v6: -Added func intel_color_get_bit_precision() to get bit precision for
> >> gamma and degamma lut readout depending upon platform and
> >> corresponding to load_luts() [Ankit]
> >> -Added debug log for color para in intel_dump_pipe_config [Jani]
> >> -Made patch11 as patch3 [Jani]
> >> v7: -Renamed func intel_color_get_bit_precision() to
> >> intel_color_get_gamma_bit_precision()
> >> -Added separate function/platform for gamma bit precision [Ville]
> >> -Corrected checkpatch warnings
> >>
> >> Signed-off-by: Swati Sharma <swati2.sharma at intel.com>
> >> ---
> >> drivers/gpu/drm/i915/intel_color.c | 166 +++++++++++++++++++++++++++++++++++
> >> drivers/gpu/drm/i915/intel_color.h | 7 ++
> >> drivers/gpu/drm/i915/intel_display.c | 24 +++++
> >> 3 files changed, 197 insertions(+)
> >>
> >> diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c
> >> index 50b98ee..b20a2c6 100644
> >> --- a/drivers/gpu/drm/i915/intel_color.c
> >> +++ b/drivers/gpu/drm/i915/intel_color.c
> >> @@ -1251,6 +1251,172 @@ static int icl_color_check(struct intel_crtc_state *crtc_state)
> >> return 0;
> >> }
> >>
> >> +static int i9xx_gamma_precision(struct intel_crtc_state *crtc_state)
> >> +{
> >> + if (!crtc_state->gamma_enable)
> >> + return 0;
> >> +
> >> + switch (crtc_state->gamma_mode) {
> >> + case GAMMA_MODE_MODE_8BIT:
> >> + return 8;
> >> + case GAMMA_MODE_MODE_10BIT:
> >> + return 16;
> >> + default:
> >> + MISSING_CASE(crtc_state->gamma_mode);
> >> + return 0;
> >> + }
> >> +}
> >> +
> >> +static int chv_gamma_precision(struct intel_crtc_state *crtc_state)
> >> +{
> >> + if (crtc_state->cgm_mode & CGM_PIPE_MODE_GAMMA)
> >> + return 10;
> >> + else
> >> + return i9xx_gamma_precision(crtc_state);
> >> +}
> >> +
> >> +static int ilk_gamma_precision(struct intel_crtc_state *crtc_state)
> >> +{
> >> + if (!crtc_state->gamma_enable)
> >> + return 0;
> >> +
> >> + if ((crtc_state->csc_mode & CSC_POSITION_BEFORE_GAMMA) == 0)
> >> + return 0;
> >> +
> >> + switch (crtc_state->gamma_mode) {
> >> + case GAMMA_MODE_MODE_8BIT:
> >> + return 8;
> >> + case GAMMA_MODE_MODE_10BIT:
> >> + return 10;
> >> + default:
> >> + MISSING_CASE(crtc_state->gamma_mode);
> >> + return 0;
> >> + }
> >> +}
> >> +
> >> +static int ivb_gamma_precision(struct intel_crtc_state *crtc_state)
> >> +{
> >> + if (!crtc_state->gamma_enable)
> >> + return 0;
> >> +
> >> + if ((crtc_state->csc_mode & CSC_POSITION_BEFORE_GAMMA) == 0)
> >> + return 0;
> >> +
> >> + switch (crtc_state->gamma_mode) {
> >> + case GAMMA_MODE_MODE_8BIT:
> >> + return 8;
> >> + case GAMMA_MODE_MODE_SPLIT:
> >> + case GAMMA_MODE_MODE_10BIT:
> >> + return 10;
> >> + default:
> >> + MISSING_CASE(crtc_state->gamma_mode);
> >> + return 0;
> >> + }
> >> +}
> >> +
> >> +static int glk_gamma_precision(struct intel_crtc_state *crtc_state)
> >> +{
> >> + if (!crtc_state->gamma_enable)
> >> + return 0;
> >> +
> >> + if ((crtc_state->csc_mode & CSC_POSITION_BEFORE_GAMMA) == 0)
> >> + return 0;
> > glk doens't have that bit.
> >
> >> +
> >> + switch (crtc_state->gamma_mode) {
> >> + case GAMMA_MODE_MODE_8BIT:
> >> + return 8;
> >> + case GAMMA_MODE_MODE_10BIT:
> >> + return 10;
> >> + default:
> >> + MISSING_CASE(crtc_state->gamma_mode);
> >> + return 0;
> >> + }
> >> +}
> >> +
> >> +static int icl_gamma_precision(struct intel_crtc_state *crtc_state)
> >> +{
> >> + if ((crtc_state->gamma_mode & PRE_CSC_GAMMA_ENABLE) == 0)
> >> + return 0;
> > POST_CSC_GAMMA
> >
> >> +
> >> + switch (crtc_state->gamma_mode & GAMMA_MODE_MODE_MASK) {
> >> + case GAMMA_MODE_MODE_8BIT:
> >> + return 8;
> >> + case GAMMA_MODE_MODE_10BIT:
> >> + return 10;
> >> + default:
> >> + MISSING_CASE(crtc_state->gamma_mode);
> >> + return 0;
> >> + }
> >> +}
> >> +
> >> +int intel_color_get_gamma_bit_precision(struct intel_crtc_state *crtc_state)
> >> +{
> >> + struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
> >> + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> >> +
> >> + if (HAS_GMCH(dev_priv)) {
> >> + if (IS_CHERRYVIEW(dev_priv))
> >> + return chv_gamma_precision(crtc_state);
> >> + else
> >> + return i9xx_gamma_precision(crtc_state);
> >> + } else {
> >> + if (INTEL_GEN(dev_priv) >= 11)
> >> + return icl_gamma_precision(crtc_state);
> >> + else if (IS_CANNONLAKE(dev_priv) || IS_GEMINILAKE(dev_priv))
> >> + return glk_gamma_precision(crtc_state);
> >> + else if (INTEL_GEN(dev_priv) >= 7)
> >> + return ivb_gamma_precision(crtc_state);
> >> + else
> >> + return ilk_gamma_precision(crtc_state);
> >> + }
> >> +
> >> + return 0;
> >> +}
> >> +
> >> +static inline bool err_check(struct drm_color_lut *sw_lut,
> >> + struct drm_color_lut *hw_lut, u32 err)
> >> +{
> >> + return ((abs((long)hw_lut->red - sw_lut->red)) <= err) &&
> >> + ((abs((long)hw_lut->blue - sw_lut->blue)) <= err) &&
> >> + ((abs((long)hw_lut->green - sw_lut->green)) <= err);
> >> +}
> >> +
> >> +bool intel_color_lut_equal(struct drm_property_blob *blob1,
> >> + struct drm_property_blob *blob2,
> >> + u32 bit_precision)
> >> +{
> >> + struct drm_color_lut *sw_lut, *hw_lut;
> >> + int sw_lut_size, hw_lut_size, i;
> >> + u32 err;
> >> +
> >> + if (!blob1 && !blob2)
> >> + return true;
> >> +
> >> + if (!blob1)
> >> + return true;
> >> +
> >> + if (!blob2)
> >> + return false;
> > What is this logic trying to do?
> >
> > Something like?
> >
> > if (!blob1 != !blob2)
> > return false;
> > if (!blob1)
> > return true;
> >
> >
> >> +
> >> + sw_lut_size = drm_color_lut_size(blob1);
> >> + hw_lut_size = drm_color_lut_size(blob2);
> >> +
> >> + if (sw_lut_size != hw_lut_size)
> >> + return false;
> > This is going to trigger with the split gamma mode. We'll need to be
> > more clever when comparing the two.
>
> So, we need check for gamma_mode here as-well?
Maybe. We're going to have to make the exception somewhere,
and then we need to pick the LUT entries to compare similarly
as how the relevanty load_lut() function picks them.
>
> >
> >> +
> >> + sw_lut = blob1->data;
> >> + hw_lut = blob2->data;
> >> +
> >> + err = 0xffff >> bit_precision;
> >> +
> >> + for (i = 0; i < sw_lut_size; i++) {
> >> + if (!err_check(&hw_lut[i], &sw_lut[i], err))
> >> + return false;
> >> + }
> >> +
> >> + return true;
> >> +}
> >> +
> >> void intel_color_init(struct intel_crtc *crtc)
> >> {
> >> struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> >> diff --git a/drivers/gpu/drm/i915/intel_color.h b/drivers/gpu/drm/i915/intel_color.h
> >> index 057e8ac..02ea1bc 100644
> >> --- a/drivers/gpu/drm/i915/intel_color.h
> >> +++ b/drivers/gpu/drm/i915/intel_color.h
> >> @@ -6,13 +6,20 @@
> >> #ifndef __INTEL_COLOR_H__
> >> #define __INTEL_COLOR_H__
> >>
> >> +#include <linux/types.h>
> >> +
> >> struct intel_crtc_state;
> >> struct intel_crtc;
> >> +struct drm_property_blob;
> >>
> >> void intel_color_init(struct intel_crtc *crtc);
> >> 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);
> >> +bool intel_color_lut_equal(struct drm_property_blob *blob1,
> >> + struct drm_property_blob *blob2,
> >> + u32 bit_precision);
> >> +int intel_color_get_gamma_bit_precision(struct intel_crtc_state *crtc_state);
> >>
> >> #endif /* __INTEL_COLOR_H__ */
> >> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> >> index 3e01028..b8ff3f4 100644
> >> --- a/drivers/gpu/drm/i915/intel_display.c
> >> +++ b/drivers/gpu/drm/i915/intel_display.c
> >> @@ -11570,6 +11570,15 @@ static void intel_dump_pipe_config(struct intel_crtc *crtc,
> >> drm_rect_width(&state->base.dst),
> >> drm_rect_height(&state->base.dst));
> >> }
> >> +
> >> + if (IS_CHERRYVIEW(dev_priv))
> >> + DRM_DEBUG_KMS("cgm_mode:%d gamma_mode:%d gamma_enable:%d csc_enable:%d\n",
> >> + pipe_config->cgm_mode, pipe_config->gamma_mode,
> >> + pipe_config->gamma_enable, pipe_config->csc_enable);
> >> + else
> >> + DRM_DEBUG_KMS("csc_mode:%d gamma_mode:%d gamma_enable:%d csc_enable:%d\n",
> >> + pipe_config->csc_mode, pipe_config->gamma_mode,
> >> + pipe_config->gamma_enable, pipe_config->csc_enable);
> >> }
> >>
> >> static bool check_digital_port_conflicts(struct drm_atomic_state *state)
> >> @@ -11947,6 +11956,7 @@ static bool fastboot_enabled(struct drm_i915_private *dev_priv)
> >> bool adjust)
> >> {
> >> bool ret = true;
> >> + u32 bp_gamma = 0;
> >> bool fixup_inherited = adjust &&
> >> (current_config->base.mode.private_flags & I915_MODE_FLAG_INHERITED) &&
> >> !(pipe_config->base.mode.private_flags & I915_MODE_FLAG_INHERITED);
> >> @@ -12098,6 +12108,15 @@ static bool fastboot_enabled(struct drm_i915_private *dev_priv)
> >> } \
> >> } while (0)
> >>
> >> +#define PIPE_CONF_CHECK_COLOR_LUT(name, bit_precision) do { \
> >> + if (!intel_color_lut_equal(current_config->name, \
> >> + pipe_config->name, bit_precision)) { \
> >> + pipe_config_err(adjust, __stringify(name), \
> >> + "hw_state doesn't match sw_state\n"); \
> >> + ret = false; \
> >> + } \
> >> +} while (0)
> >> +
> >> #define PIPE_CONF_QUIRK(quirk) \
> >> ((current_config->quirks | pipe_config->quirks) & (quirk))
> >>
> >> @@ -12193,6 +12212,10 @@ static bool fastboot_enabled(struct drm_i915_private *dev_priv)
> >> PIPE_CONF_CHECK_X(csc_mode);
> >> PIPE_CONF_CHECK_BOOL(gamma_enable);
> >> PIPE_CONF_CHECK_BOOL(csc_enable);
> >> +
> >> + bp_gamma = intel_color_get_gamma_bit_precision(pipe_config);
> >> + if (bp_gamma)
> >> + PIPE_CONF_CHECK_COLOR_LUT(base.gamma_lut, bp_gamma);
> > Sometimes the sw gamma gets programmed in the hw degamma, so we do need
> > degamma readout, and we'll need to somehow figure out which hw thing
> > is which sw thing.
>
> Can you please little bit elaborate on this? What's the usecase?
Any time gamma+ycbcr/limited range rgb output is used.
See ivb_csc_mode().
>
> >
> > I'm thinking the following sort of logic should work since so
> > far it should be just the the sw.gamma that can end up in
> > hw.degamma:
> >
> > if (sw.gamma && !hw.gamma) {
> > CHECK(sw.gamma, hw.degamma);
> > CHECK(sw.degamma, hw.gamma);
> > } else {
> > CHECK(sw.gamma, hw.gamma);
> > CHECK(sw.degamma, hw.degamma);
> > }
> >
> >> }
> >>
> >> PIPE_CONF_CHECK_BOOL(double_wide);
> >> @@ -12255,6 +12278,7 @@ static bool fastboot_enabled(struct drm_i915_private *dev_priv)
> >> #undef PIPE_CONF_CHECK_FLAGS
> >> #undef PIPE_CONF_CHECK_CLOCK_FUZZY
> >> #undef PIPE_CONF_QUIRK
> >> +#undef PIPE_CONF_CHECK_COLOR_LUT
> >>
> >> return ret;
> >> }
> >> --
> >> 1.9.1
> >>
> >> _______________________________________________
> >> Intel-gfx mailing list
> >> Intel-gfx at lists.freedesktop.org
> >> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
>
>
> --
> ~Swati Sharma
>
--
Ville Syrjälä
Intel
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