>-----Original Message----- >From: Ville Syrjälä [mailto:ville.syrjala@xxxxxxxxxxxxxxx] >Sent: Wednesday, October 31, 2018 7:32 PM >To: Shankar, Uma <uma.shankar@xxxxxxxxx> >Cc: intel-gfx@xxxxxxxxxxxxxxxxxxxxx; Syrjala, Ville <ville.syrjala@xxxxxxxxx>; >Lankhorst, Maarten <maarten.lankhorst@xxxxxxxxx> >Subject: Re: [v6 2/2] drm/i915/icl: Enable Plane Input CSC for YUV to >RGB Conversion > >On Wed, Oct 31, 2018 at 07:05:31PM +0530, Uma Shankar wrote: >> Plane input CSC needs to be enabled to convert frambuffers from YUV to >> RGB. This is needed for bottom 3 planes on ICL, rest of the planes >> have hardcoded conversion and taken care by the legacy code. >> >> This patch defines the co-efficient values for YUV to RGB conversion >> in BT709 and BT601 formats. It programs the coefficients and enables >> the plane input csc unit in hardware. >> >> This has been verified and tested by Maarten and the change is working >> as expected. >> >> v2: Addressed Maarten's and Ville's review comments and added the >> coefficients in a 2D array instead of independent Macros. >> >> v3: Added individual coefficient matrix (9 values) instead of 6 >> register values as per Maarten's comment. Also addresed a shift issue >> with B channel coefficient. >> >> v4: Added support for Limited Range Color Handling >> >> v5: Fixed Matt and Maarten's review comments. >> >> v6: Added human readable matrix values for YUV to RGB Conversion along >> with just the bspec register values, as per Matt's suggestion. >> >> Signed-off-by: Uma Shankar <uma.shankar@xxxxxxxxx> >> --- >> drivers/gpu/drm/i915/intel_color.c | 103 >+++++++++++++++++++++++++++++++++++ >> drivers/gpu/drm/i915/intel_display.c | 23 ++++++-- >> drivers/gpu/drm/i915/intel_drv.h | 2 + >> 3 files changed, 122 insertions(+), 6 deletions(-) >> >> diff --git a/drivers/gpu/drm/i915/intel_color.c >> b/drivers/gpu/drm/i915/intel_color.c >> index 5127da2..6dc9075 100644 >> --- a/drivers/gpu/drm/i915/intel_color.c >> +++ b/drivers/gpu/drm/i915/intel_color.c >> @@ -57,6 +57,15 @@ >> #define CSC_RGB_TO_YUV_RV_GV 0xbce89ad8 #define >CSC_RGB_TO_YUV_BV >> 0x1e080000 >> >> +#define ROFF(x) (((x) & 0xffff) << 16) >> +#define GOFF(x) (((x) & 0xffff) << 0) >> +#define BOFF(x) (((x) & 0xffff) << 16) >> + >> +/* Preoffset values for YUV to RGB Conversion */ >> +#define PREOFF_YUV_TO_RGB_HI 0x1800 >> +#define PREOFF_YUV_TO_RGB_ME 0x1F00 >> +#define PREOFF_YUV_TO_RGB_LO 0x1800 >> + >> /* >> * Extract the CSC coefficient from a CTM coefficient (in U32.32 fixed point >> * format). This macro takes the coefficient we want transformed and >> the @@ -643,6 +652,100 @@ int intel_color_check(struct drm_crtc *crtc, >> return -EINVAL; >> } >> >> +void icl_program_input_csc_coeff(const struct intel_crtc_state *crtc_state, >> + const struct intel_plane_state *plane_state) { >> + struct drm_i915_private *dev_priv = >> + to_i915(plane_state->base.plane->dev); >> + struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc); >> + enum pipe pipe = crtc->pipe; >> + struct intel_plane *intel_plane = >> + to_intel_plane(plane_state->base.plane); >> + enum plane_id plane = intel_plane->id; >> + >> + static const u16 input_csc_matrix[][9] = { >> + /* >> + * BT.601 full range YCbCr -> full range RGB >> + * The matrix required is : >> + * [1.000, 0.000, 1.371, >> + * 1.000, -0.336, -0.698, >> + * 1.000, 1.732, 0.0000] >> + */ >> + [DRM_COLOR_YCBCR_BT601] = { >> + 0x7AF8, 0x7800, 0x0, >> + 0x8B28, 0x7800, 0x9AC0, >> + 0x0, 0x7800, 0x7DD8, >> + }, >> + /* >> + * BT.709 full range YCbCr -> full range RGB >> + * The matrix required is : >> + * [1.000, 0.000, 1.574, >> + * 1.000, -0.187, -0.468, >> + * 1.000, 1.855, 0.0000] >> + */ >> + [DRM_COLOR_YCBCR_BT709] = { >> + 0x7C98, 0x7800, 0x0, >> + 0x9EF8, 0x7800, 0xABF8, >> + 0x0, 0x7800, 0x7ED8, >> + }, >> + }; >> + >> + /* Matrix for Limited Range to Full Range Conversion */ >> + static const u16 input_csc_matrix_lr[][9] = { >> + /* >> + * BT.601 Limted range YCbCr -> full range RGB >> + * The matrix required is : >> + * [1.164384, 0.000, 1.596370, >> + * 1.138393, -0.382500, -0.794598, >> + * 1.138393, 1.971696, 0.0000] >> + */ >> + [DRM_COLOR_YCBCR_BT601] = { >> + 0x7CC8, 0x7950, 0x0, >> + 0x8CB8, 0x7918, 0x9C40, >> + 0x0, 0x7918, 0x7FC8, >> + }, >> + /* >> + * BT.709 Limited range YCbCr -> full range RGB >> + * The matrix required is : >> + * [1.164, 0.000, 1.833671, >> + * 1.138393, -0.213249, -0.532909, >> + * 1.138393, 2.112402, 0.0000] >> + */ >> + [DRM_COLOR_YCBCR_BT709] = { >> + 0x7EA8, 0x7950, 0x0, >> + 0x8888, 0x7918, 0xADA8, >> + 0x0, 0x7918, 0x6870, >> + }, >> + }; >> + const u16 *csc; >> + >> + if (plane_state->base.color_range == >DRM_COLOR_YCBCR_FULL_RANGE) >> + csc = input_csc_matrix[plane_state->base.color_encoding]; >> + else >> + csc = input_csc_matrix_lr[plane_state->base.color_encoding]; >> + >> + I915_WRITE(PLANE_INPUT_CSC_COEFF(pipe, plane, 0), ROFF(csc[0]) | >> + GOFF(csc[1])); >> + I915_WRITE(PLANE_INPUT_CSC_COEFF(pipe, plane, 1), BOFF(csc[2])); >> + I915_WRITE(PLANE_INPUT_CSC_COEFF(pipe, plane, 2), ROFF(csc[3]) | >> + GOFF(csc[4])); >> + I915_WRITE(PLANE_INPUT_CSC_COEFF(pipe, plane, 3), BOFF(csc[5])); >> + I915_WRITE(PLANE_INPUT_CSC_COEFF(pipe, plane, 4), ROFF(csc[6]) | >> + GOFF(csc[7])); >> + I915_WRITE(PLANE_INPUT_CSC_COEFF(pipe, plane, 5), BOFF(csc[8])); >> + >> + I915_WRITE(PLANE_INPUT_CSC_PREOFF(pipe, plane, 0), >> + PREOFF_YUV_TO_RGB_HI); >> + I915_WRITE(PLANE_INPUT_CSC_PREOFF(pipe, plane, 1), >> + PREOFF_YUV_TO_RGB_ME); >> + I915_WRITE(PLANE_INPUT_CSC_PREOFF(pipe, plane, 2), >> + PREOFF_YUV_TO_RGB_LO); >> + >> + I915_WRITE(PLANE_INPUT_CSC_POSTOFF(pipe, plane, 0), 0x0); >> + I915_WRITE(PLANE_INPUT_CSC_POSTOFF(pipe, plane, 1), 0x0); >> + I915_WRITE(PLANE_INPUT_CSC_POSTOFF(pipe, plane, 2), 0x0); } >> + >> void intel_color_init(struct drm_crtc *crtc) { >> struct drm_i915_private *dev_priv = to_i915(crtc->dev); diff --git >> a/drivers/gpu/drm/i915/intel_display.c >> b/drivers/gpu/drm/i915/intel_display.c >> index fe045ab..d16a064 100644 >> --- a/drivers/gpu/drm/i915/intel_display.c >> +++ b/drivers/gpu/drm/i915/intel_display.c >> @@ -3666,6 +3666,7 @@ u32 glk_plane_color_ctl(const struct intel_crtc_state >*crtc_state, >> struct drm_i915_private *dev_priv = >> to_i915(plane_state->base.plane->dev); >> const struct drm_framebuffer *fb = plane_state->base.fb; >> + struct intel_plane *plane = to_intel_plane(plane_state->base.plane); >> u32 plane_color_ctl = 0; >> >> if (INTEL_GEN(dev_priv) < 11) { >> @@ -3676,13 +3677,23 @@ u32 glk_plane_color_ctl(const struct >intel_crtc_state *crtc_state, >> plane_color_ctl |= glk_plane_color_ctl_alpha(plane_state); >> >> if (fb->format->is_yuv) { >> - if (plane_state->base.color_encoding == >DRM_COLOR_YCBCR_BT709) >> - plane_color_ctl |= >PLANE_COLOR_CSC_MODE_YUV709_TO_RGB709; >> - else >> - plane_color_ctl |= >PLANE_COLOR_CSC_MODE_YUV601_TO_RGB709; >> + if (!icl_is_hdr_plane(plane)) { >> + if (plane_state->base.color_encoding == >> + DRM_COLOR_YCBCR_BT709) >> + plane_color_ctl |= >> + > PLANE_COLOR_CSC_MODE_YUV709_TO_RGB709; >> + else >> + plane_color_ctl |= >> + > PLANE_COLOR_CSC_MODE_YUV601_TO_RGB709; >> >> - if (plane_state->base.color_range == >DRM_COLOR_YCBCR_FULL_RANGE) >> - plane_color_ctl |= >PLANE_COLOR_YUV_RANGE_CORRECTION_DISABLE; >> + if (plane_state->base.color_range == >> + DRM_COLOR_YCBCR_FULL_RANGE) >> + plane_color_ctl |= >> + > PLANE_COLOR_YUV_RANGE_CORRECTION_DISABLE; >> + } else { >> + icl_program_input_csc_coeff(crtc_state, plane_state); > >Wrong place. This needs to be .in update_plane(). Ok, will update this. >> + plane_color_ctl |= PLANE_COLOR_INPUT_CSC_ENABLE; >> + } > >I'd probably write this whole thing as something like: > >if (is_hdr_plane() && is_yuv) { > ctl |= INPUT_CSC_ENABLE; >} else if (is_yuv) { > ... >} > >as that avoids the deep nesting you now have. Yes, this is better. Will update the patch. Thanks.. > >> } >> >> return plane_color_ctl; >> diff --git a/drivers/gpu/drm/i915/intel_drv.h >> b/drivers/gpu/drm/i915/intel_drv.h >> index db24308..bd9e946 100644 >> --- a/drivers/gpu/drm/i915/intel_drv.h >> +++ b/drivers/gpu/drm/i915/intel_drv.h >> @@ -2285,6 +2285,8 @@ int intel_plane_atomic_check_with_state(const >> struct intel_crtc_state *old_crtc_ int intel_color_check(struct >> drm_crtc *crtc, struct drm_crtc_state *state); void >> intel_color_set_csc(struct drm_crtc_state *crtc_state); void >> intel_color_load_luts(struct drm_crtc_state *crtc_state); >> +void icl_program_input_csc_coeff(const struct intel_crtc_state *crtc_state, >> + const struct intel_plane_state *plane_state); >> >> /* intel_lspcon.c */ >> bool lspcon_init(struct intel_digital_port *intel_dig_port); >> -- >> 1.9.1 >> >> _______________________________________________ >> Intel-gfx mailing list >> Intel-gfx@xxxxxxxxxxxxxxxxxxxxx >> https://lists.freedesktop.org/mailman/listinfo/intel-gfx > >-- >Ville Syrjälä >Intel _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
