On 14-May-19 9:40 PM, Ville Syrjälä wrote: > On Tue, May 14, 2019 at 03:13:21PM +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] >> >> I could think of adding intel_color_get_bit_precision() to be the way >> to get away with bit precision problem for degamma and gamma (its like a table >> having hard coded values depening on gamma_mode). >> If anybody could think of better way then this then please guide. >> >> Signed-off-by: Swati Sharma >> --- >> drivers/gpu/drm/i915/intel_color.c | 93 ++++++++++++++++++++++++++++++++++++ >> drivers/gpu/drm/i915/intel_color.h | 7 +++ >> drivers/gpu/drm/i915/intel_display.c | 24 ++++++++++ >> 3 files changed, 124 insertions(+) >> >> diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c >> index 50b98ee..1e60369 100644 >> --- a/drivers/gpu/drm/i915/intel_color.c >> +++ b/drivers/gpu/drm/i915/intel_color.c >> @@ -1251,6 +1251,99 @@ static int icl_color_check(struct intel_crtc_state *crtc_state) >> return 0; >> } >> >> +void intel_color_get_bit_precision(struct intel_crtc_state *crtc_state, int *bp_gamma) >> +{ >> + 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)) { >> + if (crtc_state->gamma_mode == GAMMA_MODE_MODE_8BIT) { >> + *bp_gamma = 8; >> + return; > Functions can actually return values. > > Not sure I particularly like this function though. We can't fit > the gamma vs. degamm stuff in here neatly. I think per-platform > stuff to determine the precision is required to make this sane. > And it should probably got into intel_color.c to keep things > neatly contained. > > Something along the lines of: > > i9xx_gamma_precision() > { > if (!gamma_enable) > return 0; > > switch (gamma_mode) { > case GAMMA_MODE_MODE_8BIT: > return 8; > case GAMMA_MODE_MODE_10BIT: > return 16; > } > } > > chv_gamma_precision() > { > if (cgm_mode & CGM_PIPE_MODE_GAMMA) > return 10; > else > return i9xx_gamma_precision(); > } > > chv_degamma_precision(crtc_state) > { > if (cgm_mode & CGM_PIPE_MODE_DEGAMMA) > return 14; > else > return 0 > } > > ilk_gamma_precision() > { > if (!gamma_enable) > return 0; > > if ((csc_mode & CSC_POSITION_BEFORE_GAMMA) == 0) > return 0; > > switch (gamma_mode) { > case GAMMA_MODE_MODE_8BIT: > return 8; > case GAMMA_MODE_MODE_10BIT: > return 10; > } > } > > ilk_degamma_precision() > { > if (!gamma_enable) > return 0; > > if ((csc_mode & CSC_POSITION_BEFORE_GAMMA) != 0) > return 0; > > switch (gamma_mode) { > case GAMMA_MODE_MODE_8BIT: > return 8; > case GAMMA_MODE_MODE_10BIT: > return 10; > } > } > > ... extend to ivb, glk, and icl variants too. ok..will do like this. thanks! sorry i was on leave. 2 queries: (1) Since intel_color_get_bit_precision() will be used to set bit precision for gamma and degamma both, it will return multiple values..should i return values as struct? or sending as pointer is ok? if (HAS_GMCH(dev_priv)) { if (IS_CHERRYVIEW(dev_priv)) *bp_gamma = chv_gamma_precision(crtc_state); (2) (or) if this method is not fine, should we have function ptr for the same? Please suggest the best method? > >> + } >> + if (crtc_state->cgm_mode == CGM_PIPE_MODE_GAMMA) >> + *bp_gamma = 10; >> + } else if (INTEL_GEN(dev_priv) >= 4) { >> + if (crtc_state->gamma_mode == GAMMA_MODE_MODE_8BIT) >> + *bp_gamma = 8; >> + else >> + *bp_gamma = 16; >> + } else { >> + *bp_gamma = 8; >> + } >> + } else { >> + if (INTEL_GEN(dev_priv) >= 11) { >> + if ((crtc_state->gamma_mode & GAMMA_MODE_MODE_MASK) == >> + GAMMA_MODE_MODE_8BIT) >> + *bp_gamma = 8; >> + else >> + *bp_gamma = 10; >> + } else if (IS_CANNONLAKE(dev_priv) || IS_GEMINILAKE(dev_priv)) { >> + if (crtc_state->gamma_mode == GAMMA_MODE_MODE_8BIT) >> + *bp_gamma = 8; >> + else >> + *bp_gamma = 10; >> + } else if (INTEL_GEN(dev_priv) >= 7) { >> + if (crtc_state->gamma_mode == GAMMA_MODE_MODE_8BIT) >> + *bp_gamma = 8; >> + else if (crtc_state->gamma_mode == GAMMA_MODE_MODE_SPLIT) >> + *bp_gamma = 10; >> + else >> + *bp_gamma = 10; >> + } else { >> + if (crtc_state->gamma_mode == GAMMA_MODE_MODE_8BIT) >> + *bp_gamma = 8; >> + else >> + *bp_gamma = 10; >> + } >> + } >> +} >> + >> +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; >> + >> + 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; >> + >> + 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..f2872d3 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 >> + >> 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); >> +void intel_color_get_bit_precision(struct intel_crtc_state *crtc_state, int *bp_gamma); >> >> #endif /* __INTEL_COLOR_H__ */ >> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c >> index 3e01028..46985c15 100644 >> --- a/drivers/gpu/drm/i915/intel_display.c >> +++ b/drivers/gpu/drm/i915/intel_display.c >> @@ -11570,6 +11570,16 @@ 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 +11957,7 @@ 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 +12109,15 @@ 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 +12213,9 @@ 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); >> + >> + intel_color_get_bit_precision(pipe_config, &bp_gamma); >> + PIPE_CONF_CHECK_COLOR_LUT(base.gamma_lut, bp_gamma); >> } >> >> 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 -- ~Swati Sharma