On Wed, Jan 16, 2019 at 09:51:35PM +0530, Uma Shankar wrote:
> Enable ICL pipe csc hardware. CSC block is enabled
> in CSC_MODE register instead of PLANE_COLOR_CTL.
>
> ToDO: Extend the ABI to accept 32 bit coefficient values
> instead of 16bit for future platforms.
>
> v2: Addressed Maarten's review comments.
>
> v3: Addressed Matt's review comments. Removed rmw patterns
> as suggested by Matt.
>
> v4: Addressed Matt's review comments.
>
> v5: Addressed Ville's review comments.
>
> v6: Separated pipe output csc programming from regular csc.
>
> Signed-off-by: Uma Shankar <uma.shankar@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_reg.h | 9 ++++++---
> drivers/gpu/drm/i915/intel_color.c | 7 ++++++-
> 2 files changed, 12 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index a84200f..3c3a902 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -9861,10 +9861,13 @@ enum skl_power_gate {
> #define _PIPE_A_CSC_COEFF_BU 0x4901c
> #define _PIPE_A_CSC_COEFF_RV_GV 0x49020
> #define _PIPE_A_CSC_COEFF_BV 0x49024
> +
> #define _PIPE_A_CSC_MODE 0x49028
> -#define CSC_BLACK_SCREEN_OFFSET (1 << 2)
> -#define CSC_POSITION_BEFORE_GAMMA (1 << 1)
> -#define CSC_MODE_YUV_TO_RGB (1 << 0)
> +#define ICL_CSC_ENABLE (1 << 31)
> +#define CSC_BLACK_SCREEN_OFFSET (1 << 2)
> +#define CSC_POSITION_BEFORE_GAMMA (1 << 1)
> +#define CSC_MODE_YUV_TO_RGB (1 << 0)
> +
> #define _PIPE_A_CSC_PREOFF_HI 0x49030
> #define _PIPE_A_CSC_PREOFF_ME 0x49034
> #define _PIPE_A_CSC_PREOFF_LO 0x49038
> diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c
> index 494891c..9b8d2de 100644
> --- a/drivers/gpu/drm/i915/intel_color.c
> +++ b/drivers/gpu/drm/i915/intel_color.c
> @@ -134,6 +134,7 @@ static void ilk_load_ycbcr_conversion_matrix(struct intel_crtc *crtc)
> 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);
> }
Seems like an unintentional change?
Otherwise, this looks good now that the output csc for rgb->yuv is moved
to the next patch.
Reviewed-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
>
> @@ -242,7 +243,10 @@ 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);
>
> - I915_WRITE(PIPE_CSC_MODE(pipe), 0);
> + if (INTEL_GEN(dev_priv) >= 11)
> + I915_WRITE(PIPE_CSC_MODE(pipe), ICL_CSC_ENABLE);
> + else
> + I915_WRITE(PIPE_CSC_MODE(pipe), 0);
> } else {
> uint32_t mode = CSC_MODE_YUV_TO_RGB;
>
> @@ -692,6 +696,7 @@ void intel_color_init(struct intel_crtc *crtc)
> 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_csc_matrix = ilk_load_csc_matrix;
> dev_priv->display.load_luts = icl_load_luts;
> } else {
> dev_priv->display.load_luts = i9xx_load_luts;
> --
> 1.9.1
>
--
Matt Roper
Graphics Software Engineer
IoTG Platform Enabling & Development
Intel Corporation
(916) 356-2795
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