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| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2019-02-18 22:31:36 +0300 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2019-03-15 23:32:13 +0300 |
| commit | b281264f8b8125cc888d01a3ddf2947a0a50e9bc (patch) | |
| tree | dc88de796c35bef98606f2bba70253c7d4ad26d3 /drivers/gpu/drm/i915/intel_color.c | |
| parent | c9e235aa0f9d97b0ec2c117583d3c30161884ab5 (diff) | |
| download | linux-b281264f8b8125cc888d01a3ddf2947a0a50e9bc.tar.xz | |
drm/i915: Clean the csc limited range/identity programming
Just provide precomputed CSC matrices for the identity and
limited range cases. This removes the remaining nuts and bolts
stuff from ilk_load_csc_matrix(), allowing one to actually
see the high level logic.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190218193137.22914-7-ville.syrjala@linux.intel.com
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_color.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_color.c | 53 |
1 files changed, 27 insertions, 26 deletions
diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c index 1bbc76f829a6..016b2b215ea6 100644 --- a/drivers/gpu/drm/i915/intel_color.c +++ b/drivers/gpu/drm/i915/intel_color.c @@ -52,21 +52,31 @@ #define ILK_CSC_COEFF_FP(coeff, fbits) \ (clamp_val(((coeff) >> (32 - (fbits) - 3)) + 4, 0, 0xfff) & 0xff8) -#define ILK_CSC_COEFF_LIMITED_RANGE \ - ILK_CSC_COEFF_FP(CTM_COEFF_LIMITED_RANGE, 9) -#define ILK_CSC_COEFF_1_0 \ - ((7 << 12) | ILK_CSC_COEFF_FP(CTM_COEFF_1_0, 8)) +#define ILK_CSC_COEFF_LIMITED_RANGE 0x0dc0 +#define ILK_CSC_COEFF_1_0 0x7800 #define ILK_CSC_POSTOFF_LIMITED_RANGE (16 * (1 << 12) / 255) static const u16 ilk_csc_off_zero[3] = {}; +static const u16 ilk_csc_coeff_identity[9] = { + ILK_CSC_COEFF_1_0, 0, 0, + 0, ILK_CSC_COEFF_1_0, 0, + 0, 0, ILK_CSC_COEFF_1_0, +}; + static const u16 ilk_csc_postoff_limited_range[3] = { ILK_CSC_POSTOFF_LIMITED_RANGE, ILK_CSC_POSTOFF_LIMITED_RANGE, ILK_CSC_POSTOFF_LIMITED_RANGE, }; +static const u16 ilk_csc_coeff_limited_range[9] = { + ILK_CSC_COEFF_LIMITED_RANGE, 0, 0, + 0, ILK_CSC_COEFF_LIMITED_RANGE, 0, + 0, 0, ILK_CSC_COEFF_LIMITED_RANGE, +}; + /* * These values are direct register values specified in the Bspec, * for RGB->YUV conversion matrix (colorspace BT709) @@ -247,7 +257,6 @@ static void ilk_load_csc_matrix(const struct intel_crtc_state *crtc_state) bool limited_color_range = ilk_csc_limited_range(crtc_state); enum pipe pipe = crtc->pipe; u16 coeffs[9] = {}; - int i; if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420 || crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR444) { @@ -271,28 +280,20 @@ static void ilk_load_csc_matrix(const struct intel_crtc_state *crtc_state) if (crtc_state->base.ctm) { ilk_csc_convert_ctm(crtc_state, coeffs); - } else { - /* - * Load an identity matrix if no coefficients are provided. - * - * TODO: Check what kind of values actually come out of the - * pipe with these coeff/postoff values and adjust to get the - * best accuracy. Perhaps we even need to take the bpc value - * into consideration. - */ - for (i = 0; i < 3; i++) { - if (limited_color_range) - coeffs[i * 3 + i] = - ILK_CSC_COEFF_LIMITED_RANGE; - else - coeffs[i * 3 + i] = ILK_CSC_COEFF_1_0; - } - } - ilk_update_pipe_csc(crtc, ilk_csc_off_zero, coeffs, - limited_color_range ? - ilk_csc_postoff_limited_range : - ilk_csc_off_zero); + ilk_update_pipe_csc(crtc, ilk_csc_off_zero, coeffs, + limited_color_range ? + ilk_csc_postoff_limited_range : + ilk_csc_off_zero); + } else if (limited_color_range) { + ilk_update_pipe_csc(crtc, ilk_csc_off_zero, + ilk_csc_coeff_limited_range, + ilk_csc_postoff_limited_range); + } else if (crtc_state->csc_enable) { + ilk_update_pipe_csc(crtc, ilk_csc_off_zero, + ilk_csc_coeff_identity, + ilk_csc_off_zero); + } I915_WRITE(PIPE_CSC_MODE(pipe), crtc_state->csc_mode); } |