On Wed, Jan 16, 2019 at 09:51:36PM +0530, Uma Shankar wrote:
> GEN11+ onwards an output csc hardware block has been added.
> This is after the pipe gamma block and is in addition to the
> legacy pipe CSC block. Primary use case for this block is to
> convert RGB to YUV in case sink supports YUV.
> This patch adds supports for the same.
>
> v2: This is added after splitting the existing ICL pipe CSC
> handling. As per Matt's suggestion, made this to co-exist
> with existing pipe CSC, wherein both can be enabled if a
> certain usecase arises.
>
> Signed-off-by: Uma Shankar <uma.shankar@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_reg.h | 41 +++++++++++++++++++++
> drivers/gpu/drm/i915/intel_color.c | 75 ++++++++++++++++++++++++++++----------
> drivers/gpu/drm/i915/intel_drv.h | 3 ++
> 3 files changed, 99 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 3c3a902..edd6b4d 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -9864,6 +9864,7 @@ enum skl_power_gate {
>
> #define _PIPE_A_CSC_MODE 0x49028
> #define ICL_CSC_ENABLE (1 << 31)
> +#define ICL_OUTPUT_CSC_ENABLE (1 << 30)
> #define CSC_BLACK_SCREEN_OFFSET (1 << 2)
> #define CSC_POSITION_BEFORE_GAMMA (1 << 1)
> #define CSC_MODE_YUV_TO_RGB (1 << 0)
> @@ -9903,6 +9904,46 @@ enum skl_power_gate {
> #define PIPE_CSC_POSTOFF_ME(pipe) _MMIO_PIPE(pipe, _PIPE_A_CSC_POSTOFF_ME, _PIPE_B_CSC_POSTOFF_ME)
> #define PIPE_CSC_POSTOFF_LO(pipe) _MMIO_PIPE(pipe, _PIPE_A_CSC_POSTOFF_LO, _PIPE_B_CSC_POSTOFF_LO)
>
> +/* Pipe Output CSC */
> +#define _PIPE_A_OUTPUT_CSC_COEFF_RY_GY 0x49050
> +#define _PIPE_A_OUTPUT_CSC_COEFF_BY 0x49054
> +#define _PIPE_A_OUTPUT_CSC_COEFF_RU_GU 0x49058
> +#define _PIPE_A_OUTPUT_CSC_COEFF_BU 0x4905c
> +#define _PIPE_A_OUTPUT_CSC_COEFF_RV_GV 0x49060
> +#define _PIPE_A_OUTPUT_CSC_COEFF_BV 0x49064
> +#define _PIPE_A_OUTPUT_CSC_PREOFF_HI 0x49068
> +#define _PIPE_A_OUTPUT_CSC_PREOFF_ME 0x4906c
> +#define _PIPE_A_OUTPUT_CSC_PREOFF_LO 0x49070
> +#define _PIPE_A_OUTPUT_CSC_POSTOFF_HI 0x49074
> +#define _PIPE_A_OUTPUT_CSC_POSTOFF_ME 0x49078
> +#define _PIPE_A_OUTPUT_CSC_POSTOFF_LO 0x4907c
> +
> +#define _PIPE_B_OUTPUT_CSC_COEFF_RY_GY 0x49150
> +#define _PIPE_B_OUTPUT_CSC_COEFF_BY 0x49154
> +#define _PIPE_B_OUTPUT_CSC_COEFF_RU_GU 0x49158
> +#define _PIPE_B_OUTPUT_CSC_COEFF_BU 0x4915c
> +#define _PIPE_B_OUTPUT_CSC_COEFF_RV_GV 0x49160
> +#define _PIPE_B_OUTPUT_CSC_COEFF_BV 0x49164
> +#define _PIPE_B_OUTPUT_CSC_PREOFF_HI 0x49168
> +#define _PIPE_B_OUTPUT_CSC_PREOFF_ME 0x4916c
> +#define _PIPE_B_OUTPUT_CSC_PREOFF_LO 0x49170
> +#define _PIPE_B_OUTPUT_CSC_POSTOFF_HI 0x49174
> +#define _PIPE_B_OUTPUT_CSC_POSTOFF_ME 0x49178
> +#define _PIPE_B_OUTPUT_CSC_POSTOFF_LO 0x4917c
> +
> +#define PIPE_CSC_OUTPUT_COEFF_RY_GY(pipe) _MMIO_PIPE(pipe, _PIPE_A_OUTPUT_CSC_COEFF_RY_GY, _PIPE_B_OUTPUT_CSC_COEFF_RY_GY)
> +#define PIPE_CSC_OUTPUT_COEFF_BY(pipe) _MMIO_PIPE(pipe, _PIPE_A_OUTPUT_CSC_COEFF_BY, _PIPE_B_OUTPUT_CSC_COEFF_BY)
> +#define PIPE_CSC_OUTPUT_COEFF_RU_GU(pipe) _MMIO_PIPE(pipe, _PIPE_A_OUTPUT_CSC_COEFF_RU_GU, _PIPE_B_OUTPUT_CSC_COEFF_RU_GU)
> +#define PIPE_CSC_OUTPUT_COEFF_BU(pipe) _MMIO_PIPE(pipe, _PIPE_A_OUTPUT_CSC_COEFF_BU, _PIPE_B_OUTPUT_CSC_COEFF_BU)
> +#define PIPE_CSC_OUTPUT_COEFF_RV_GV(pipe) _MMIO_PIPE(pipe, _PIPE_A_OUTPUT_CSC_COEFF_RV_GV, _PIPE_B_OUTPUT_CSC_COEFF_RV_GV)
> +#define PIPE_CSC_OUTPUT_COEFF_BV(pipe) _MMIO_PIPE(pipe, _PIPE_A_OUTPUT_CSC_COEFF_BV, _PIPE_B_OUTPUT_CSC_COEFF_BV)
> +#define PIPE_CSC_OUTPUT_PREOFF_HI(pipe) _MMIO_PIPE(pipe, _PIPE_A_OUTPUT_CSC_PREOFF_HI, _PIPE_B_OUTPUT_CSC_PREOFF_HI)
> +#define PIPE_CSC_OUTPUT_PREOFF_ME(pipe) _MMIO_PIPE(pipe, _PIPE_A_OUTPUT_CSC_PREOFF_ME, _PIPE_B_OUTPUT_CSC_PREOFF_ME)
> +#define PIPE_CSC_OUTPUT_PREOFF_LO(pipe) _MMIO_PIPE(pipe, _PIPE_A_OUTPUT_CSC_PREOFF_LO, _PIPE_B_OUTPUT_CSC_PREOFF_LO)
> +#define PIPE_CSC_OUTPUT_POSTOFF_HI(pipe) _MMIO_PIPE(pipe, _PIPE_A_OUTPUT_CSC_POSTOFF_HI, _PIPE_B_OUTPUT_CSC_POSTOFF_HI)
> +#define PIPE_CSC_OUTPUT_POSTOFF_ME(pipe) _MMIO_PIPE(pipe, _PIPE_A_OUTPUT_CSC_POSTOFF_ME, _PIPE_B_OUTPUT_CSC_POSTOFF_ME)
> +#define PIPE_CSC_OUTPUT_POSTOFF_LO(pipe) _MMIO_PIPE(pipe, _PIPE_A_OUTPUT_CSC_POSTOFF_LO, _PIPE_B_OUTPUT_CSC_POSTOFF_LO)
> +
> /* pipe degamma/gamma LUTs on IVB+ */
> #define _PAL_PREC_INDEX_A 0x4A400
> #define _PAL_PREC_INDEX_B 0x4AC00
> diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c
> index 9b8d2de..c95adb9 100644
> --- a/drivers/gpu/drm/i915/intel_color.c
> +++ b/drivers/gpu/drm/i915/intel_color.c
> @@ -113,29 +113,58 @@ static u64 *ctm_mult_by_limited(u64 *result, const u64 *input)
> return result;
> }
>
> -static void ilk_load_ycbcr_conversion_matrix(struct intel_crtc *crtc)
> +static void ilk_load_ycbcr_conversion_matrix(struct intel_crtc_state
> + *crtc_state)
> {
> - int pipe = crtc->pipe;
> + struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
> struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> + int pipe = crtc->pipe;
>
> - I915_WRITE(PIPE_CSC_PREOFF_HI(pipe), 0);
> - I915_WRITE(PIPE_CSC_PREOFF_ME(pipe), 0);
> - I915_WRITE(PIPE_CSC_PREOFF_LO(pipe), 0);
> + if (INTEL_GEN(dev_priv) < 11) {
> + I915_WRITE(PIPE_CSC_PREOFF_HI(pipe), 0);
> + I915_WRITE(PIPE_CSC_PREOFF_ME(pipe), 0);
> + I915_WRITE(PIPE_CSC_PREOFF_LO(pipe), 0);
>
> - I915_WRITE(PIPE_CSC_COEFF_RU_GU(pipe), CSC_RGB_TO_YUV_RU_GU);
> - I915_WRITE(PIPE_CSC_COEFF_BU(pipe), CSC_RGB_TO_YUV_BU);
> + I915_WRITE(PIPE_CSC_COEFF_RU_GU(pipe), CSC_RGB_TO_YUV_RU_GU);
> + I915_WRITE(PIPE_CSC_COEFF_BU(pipe), CSC_RGB_TO_YUV_BU);
>
> - I915_WRITE(PIPE_CSC_COEFF_RY_GY(pipe), CSC_RGB_TO_YUV_RY_GY);
> - I915_WRITE(PIPE_CSC_COEFF_BY(pipe), CSC_RGB_TO_YUV_BY);
> + I915_WRITE(PIPE_CSC_COEFF_RY_GY(pipe), CSC_RGB_TO_YUV_RY_GY);
> + I915_WRITE(PIPE_CSC_COEFF_BY(pipe), CSC_RGB_TO_YUV_BY);
>
> - I915_WRITE(PIPE_CSC_COEFF_RV_GV(pipe), CSC_RGB_TO_YUV_RV_GV);
> - I915_WRITE(PIPE_CSC_COEFF_BV(pipe), CSC_RGB_TO_YUV_BV);
> + I915_WRITE(PIPE_CSC_COEFF_RV_GV(pipe), CSC_RGB_TO_YUV_RV_GV);
> + I915_WRITE(PIPE_CSC_COEFF_BV(pipe), CSC_RGB_TO_YUV_BV);
>
> - I915_WRITE(PIPE_CSC_POSTOFF_HI(pipe), POSTOFF_RGB_TO_YUV_HI);
> - I915_WRITE(PIPE_CSC_POSTOFF_ME(pipe), POSTOFF_RGB_TO_YUV_ME);
> - I915_WRITE(PIPE_CSC_POSTOFF_LO(pipe), POSTOFF_RGB_TO_YUV_LO);
> + I915_WRITE(PIPE_CSC_POSTOFF_HI(pipe), POSTOFF_RGB_TO_YUV_HI);
> + I915_WRITE(PIPE_CSC_POSTOFF_ME(pipe), POSTOFF_RGB_TO_YUV_ME);
> + I915_WRITE(PIPE_CSC_POSTOFF_LO(pipe), POSTOFF_RGB_TO_YUV_LO);
>
> - I915_WRITE(PIPE_CSC_MODE(pipe), 0);
> + crtc_state->csc_mode = 0;
This should be set during the atomic check phase rather than during the
commit. But I suspect that will happen anyway once Ville's series lands
and you rebase.
> + } else {
> + I915_WRITE(PIPE_CSC_OUTPUT_PREOFF_HI(pipe), 0);
> + I915_WRITE(PIPE_CSC_OUTPUT_PREOFF_ME(pipe), 0);
> + I915_WRITE(PIPE_CSC_OUTPUT_PREOFF_LO(pipe), 0);
> +
> + I915_WRITE(PIPE_CSC_OUTPUT_COEFF_RU_GU(pipe),
> + CSC_RGB_TO_YUV_RU_GU);
> + I915_WRITE(PIPE_CSC_OUTPUT_COEFF_BU(pipe), CSC_RGB_TO_YUV_BU);
> +
> + I915_WRITE(PIPE_CSC_OUTPUT_COEFF_RY_GY(pipe),
> + CSC_RGB_TO_YUV_RY_GY);
> + I915_WRITE(PIPE_CSC_OUTPUT_COEFF_BY(pipe), CSC_RGB_TO_YUV_BY);
> +
> + I915_WRITE(PIPE_CSC_OUTPUT_COEFF_RV_GV(pipe),
> + CSC_RGB_TO_YUV_RV_GV);
> + I915_WRITE(PIPE_CSC_OUTPUT_COEFF_BV(pipe), CSC_RGB_TO_YUV_BV);
> +
> + I915_WRITE(PIPE_CSC_OUTPUT_POSTOFF_HI(pipe),
> + POSTOFF_RGB_TO_YUV_HI);
> + I915_WRITE(PIPE_CSC_OUTPUT_POSTOFF_ME(pipe),
> + POSTOFF_RGB_TO_YUV_ME);
> + I915_WRITE(PIPE_CSC_OUTPUT_POSTOFF_LO(pipe),
> + POSTOFF_RGB_TO_YUV_LO);
> +
> + crtc_state->csc_mode = ICL_OUTPUT_CSC_ENABLE;
> + }
> }
>
> static void ilk_load_csc_matrix(struct intel_crtc_state *crtc_state)
> @@ -153,10 +182,14 @@ static void ilk_load_csc_matrix(struct intel_crtc_state *crtc_state)
> if (INTEL_GEN(dev_priv) >= 8 || IS_HASWELL(dev_priv))
> limited_color_range = crtc_state->limited_color_range;
>
> + crtc_state->csc_mode = 0;
> if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420 ||
> crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR444) {
> - ilk_load_ycbcr_conversion_matrix(crtc);
> - return;
> + ilk_load_ycbcr_conversion_matrix(crtc_state);
> + if (INTEL_GEN(dev_priv) < 11) {
> + I915_WRITE(PIPE_CSC_MODE(pipe), crtc_state->csc_mode);
> + return;
> + }
Isn't this going to lead us to still exit immediately after programming
the output CSC? I.e., we'll never program the userspace matrix into the
first CSC because that only happens in the 'else if (crtc_state->base.ctm)'
branch below. We probably need to remove the RGB->YUV logic from
the if/else check that figures out what to program in the first CSC.
Matt
> } else if (crtc_state->base.ctm) {
> struct drm_color_ctm *ctm = crtc_state->base.ctm->data;
> const u64 *input;
> @@ -243,10 +276,12 @@ static void ilk_load_csc_matrix(struct intel_crtc_state *crtc_state)
> I915_WRITE(PIPE_CSC_POSTOFF_ME(pipe), postoff);
> I915_WRITE(PIPE_CSC_POSTOFF_LO(pipe), postoff);
>
> - if (INTEL_GEN(dev_priv) >= 11)
> - I915_WRITE(PIPE_CSC_MODE(pipe), ICL_CSC_ENABLE);
> - else
> + if (INTEL_GEN(dev_priv) >= 11) {
> + crtc_state->csc_mode |= ICL_CSC_ENABLE;
> + I915_WRITE(PIPE_CSC_MODE(pipe), crtc_state->csc_mode);
> + } else {
> I915_WRITE(PIPE_CSC_MODE(pipe), 0);
> + }
> } else {
> uint32_t mode = CSC_MODE_YUV_TO_RGB;
>
> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> index e5a436c..320a413 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -930,6 +930,9 @@ struct intel_crtc_state {
> /* Gamma mode programmed on the pipe */
> uint32_t gamma_mode;
>
> + /* CSC mode programmed on the pipe */
> + uint32_t csc_mode;
> +
> /* bitmask of visible planes (enum plane_id) */
> u8 active_planes;
> u8 nv12_planes;
> --
> 1.9.1
>
--
Matt Roper
Graphics Software Engineer
IoTG Platform Enabling & Development
Intel Corporation
(916) 356-2795
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