Add support for icl pipe degamma and gamma. v2: Removed a POSTING_READ and corrected the Bit Definition as per Maarten's comments.
v3: Addressed Matt's review comments. Removed rmw patterns as suggested by Matt. Signed-off-by: Uma Shankar <uma.shan...@intel.com> --- drivers/gpu/drm/i915/i915_reg.h | 3 ++ drivers/gpu/drm/i915/intel_color.c | 73 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 76 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 47baf2fe..b0147bf 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -7058,6 +7058,9 @@ enum { #define GAMMA_MODE_MODE_12BIT (2 << 0) #define GAMMA_MODE_MODE_SPLIT (3 << 0) +#define PRE_CSC_GAMMA_ENABLE (1 << 31) +#define POST_CSC_GAMMA_ENABLE (1 << 30) + /* DMC/CSR */ #define CSR_PROGRAM(i) _MMIO(0x80000 + (i) * 4) #define CSR_SSP_BASE_ADDR_GEN9 0x00002FC0 diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c index 5127da2..7c8c996 100644 --- a/drivers/gpu/drm/i915/intel_color.c +++ b/drivers/gpu/drm/i915/intel_color.c @@ -422,6 +422,7 @@ static void bdw_load_degamma_lut(struct drm_crtc_state *state) static void bdw_load_gamma_lut(struct drm_crtc_state *state, u32 offset) { struct drm_i915_private *dev_priv = to_i915(state->crtc->dev); + struct intel_crtc_state *intel_state = to_intel_crtc_state(state); enum pipe pipe = to_intel_crtc(state->crtc)->pipe; uint32_t i, lut_size = INTEL_INFO(dev_priv)->color.gamma_lut_size; @@ -464,6 +465,9 @@ static void bdw_load_gamma_lut(struct drm_crtc_state *state, u32 offset) I915_WRITE(PREC_PAL_GC_MAX(pipe, 1), (1 << 16) - 1); I915_WRITE(PREC_PAL_GC_MAX(pipe, 2), (1 << 16) - 1); } + + if (INTEL_GEN(dev_priv) >= 11) + intel_state->gamma_mode |= POST_CSC_GAMMA_ENABLE; } /* Loads the palette/gamma unit for the CRTC on Broadwell+. */ @@ -523,6 +527,53 @@ static void glk_load_degamma_lut(struct drm_crtc_state *state) I915_WRITE(PRE_CSC_GAMC_DATA(pipe), (1 << 16)); } +static void icl_load_degamma_lut(struct drm_crtc_state *state) +{ + struct drm_i915_private *dev_priv = to_i915(state->crtc->dev); + struct intel_crtc_state *intel_state = to_intel_crtc_state(state); + enum pipe pipe = to_intel_crtc(state->crtc)->pipe; + const uint32_t lut_size = INTEL_INFO(dev_priv)->color.degamma_lut_size; + uint32_t i; + + /* + * When setting the auto-increment bit, the hardware seems to + * ignore the index bits, so we need to reset it to index 0 + * separately. + */ + I915_WRITE(PRE_CSC_GAMC_INDEX(pipe), 0); + I915_WRITE(PRE_CSC_GAMC_INDEX(pipe), PRE_CSC_GAMC_AUTO_INCREMENT); + + if (state->degamma_lut) { + struct drm_color_lut *lut = + (struct drm_color_lut *) state->degamma_lut->data; + for (i = 0; i < lut_size; i++) { + /* + * First 33 entries represent range from 0 to 1.0 + * 34th and 35th entry will represent extended range + * inputs 3.0 and 7.0 respectively, currently clamped + * at 1.0. + * ToDo: Extend to max 7.0. + */ + uint32_t word = + drm_color_lut_extract(lut[i].red, 16); + I915_WRITE(PRE_CSC_GAMC_DATA(pipe), word); + } + } else { + /* load a linear table. */ + for (i = 0; i < lut_size; i++) { + uint32_t v = (i * (1 << 16)) / (lut_size - 1); + + I915_WRITE(PRE_CSC_GAMC_DATA(pipe), v); + } + } + + intel_state->gamma_mode |= PRE_CSC_GAMMA_ENABLE; + + /* Clamp values > 1.0. */ + while (i++ < 35) + I915_WRITE(PRE_CSC_GAMC_DATA(pipe), (1 << 16)); +} + static void glk_load_luts(struct drm_crtc_state *state) { struct drm_crtc *crtc = state->crtc; @@ -606,6 +657,26 @@ static void cherryview_load_luts(struct drm_crtc_state *state) i9xx_load_luts_internal(crtc, NULL, to_intel_crtc_state(state)); } +static void icl_load_luts(struct drm_crtc_state *state) +{ + struct drm_crtc *crtc = state->crtc; + struct drm_device *dev = crtc->dev; + struct drm_i915_private *dev_priv = to_i915(dev); + struct intel_crtc_state *intel_state = to_intel_crtc_state(state); + enum pipe pipe = to_intel_crtc(crtc)->pipe; + + if (crtc_state_is_legacy_gamma(state)) { + haswell_load_luts(state); + return; + } + + icl_load_degamma_lut(state); + bdw_load_gamma_lut(state, 0); + + intel_state->gamma_mode |= GAMMA_MODE_MODE_10BIT; + I915_WRITE(GAMMA_MODE(pipe), intel_state->gamma_mode); +} + void intel_color_load_luts(struct drm_crtc_state *crtc_state) { struct drm_device *dev = crtc_state->crtc->dev; @@ -662,6 +733,8 @@ void intel_color_init(struct drm_crtc *crtc) } else if (IS_GEMINILAKE(dev_priv) || IS_CANNONLAKE(dev_priv)) { dev_priv->display.load_csc_matrix = ilk_load_csc_matrix; dev_priv->display.load_luts = glk_load_luts; + } else if (IS_ICELAKE(dev_priv)) { + dev_priv->display.load_luts = icl_load_luts; } else { dev_priv->display.load_luts = i9xx_load_luts; } -- 1.9.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx