Hi Uma,
On Fri, Aug 17, 2018 at 07:48:50PM +0530, Uma Shankar wrote:
> Implement Plane Gamma feature for BDW and Gen9 platforms.
>
> v2: Used newly added drm_color_lut_ext structure for enhanced
> precision for Gamma LUT entries.
>
> v3: Rebase
>
> Signed-off-by: Uma Shankar <uma.shankar@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_pci.c | 5 +++-
> drivers/gpu/drm/i915/i915_reg.h | 25 ++++++++++++++++
> drivers/gpu/drm/i915/intel_color.c | 58 ++++++++++++++++++++++++++++++++++++
> drivers/gpu/drm/i915/intel_display.c | 4 +++
> drivers/gpu/drm/i915/intel_sprite.c | 4 +++
> 5 files changed, 95 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
> index e931b48..40de78c 100644
> --- a/drivers/gpu/drm/i915/i915_pci.c
> +++ b/drivers/gpu/drm/i915/i915_pci.c
> @@ -54,7 +54,10 @@
> .cursor_offsets = { CURSOR_A_OFFSET, IVB_CURSOR_B_OFFSET, IVB_CURSOR_C_OFFSET }
>
> #define BDW_COLORS \
> - .color = { .degamma_lut_size = 512, .gamma_lut_size = 512 }
> + .color = { .degamma_lut_size = 512, .gamma_lut_size = 512 }, \
> + .plane_color = { .plane_degamma_lut_size = 0, \
> + .plane_gamma_lut_size = 16 }
> +
> #define CHV_COLORS \
> .color = { .degamma_lut_size = 65, .gamma_lut_size = 257 }
> #define GLK_COLORS \
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 0c9f03d..2db6a84 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -172,6 +172,10 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
> #define _PHY3(phy, ...) _PICK(phy, __VA_ARGS__)
> #define _MMIO_PHY3(phy, a, b, c) _MMIO(_PHY3(phy, a, b, c))
>
> +/* Plane Gamma Registers */
> +#define _MMIO_PLANE_GAMC(plane, i, a, b) _MMIO(_PIPE(plane, a, b) + (i) * 4)
> +#define _MMIO_PLANE_GAMC16(plane, i, a, b) _MMIO(_PIPE(plane, a, b) + (i) * 4)
> +
> #define __MASKED_FIELD(mask, value) ((mask) << 16 | (value))
> #define _MASKED_FIELD(mask, value) ({ \
> if (__builtin_constant_p(mask)) \
> @@ -9713,6 +9717,27 @@ enum skl_power_gate {
> #define PRE_CSC_GAMC_INDEX(pipe) _MMIO_PIPE(pipe, _PRE_CSC_GAMC_INDEX_A, _PRE_CSC_GAMC_INDEX_B)
> #define PRE_CSC_GAMC_DATA(pipe) _MMIO_PIPE(pipe, _PRE_CSC_GAMC_DATA_A, _PRE_CSC_GAMC_DATA_B)
>
> +/* Plane Gamma in Gen9+ */
> +#define _PLANE_GAMC_1_A 0x701d0
> +#define _PLANE_GAMC_1_B 0x711d0
> +#define _PLANE_GAMC_2_A 0x702d0
> +#define _PLANE_GAMC_2_B 0x712d0
> +#define _PLANE_GAMC_1(pipe) _PIPE(pipe, _PLANE_GAMC_1_A, _PLANE_GAMC_1_B)
> +#define _PLANE_GAMC_2(pipe) _PIPE(pipe, _PLANE_GAMC_2_A, _PLANE_GAMC_2_B)
> +#define PLANE_GAMC(pipe, plane, i) \
> + _MMIO_PLANE_GAMC(plane, i, _PLANE_GAMC_1(pipe), _PLANE_GAMC_2(pipe))
> +
> +#define _PLANE_GAMC16_1_A 0x70210
> +#define _PLANE_GAMC16_1_B 0x71210
> +#define _PLANE_GAMC16_2_A 0x70310
> +#define _PLANE_GAMC16_2_B 0x71310
> +#define _PLANE_GAMC16_1(pipe) _PIPE(pipe, _PLANE_GAMC16_1_A, \
> + _PLANE_GAMC16_1_B)
> +#define _PLANE_GAMC16_2(pipe) _PIPE(pipe, _PLANE_GAMC16_2_A, \
> + _PLANE_GAMC16_2_B)
> +#define PLANE_GAMC16(pipe, plane, i) _MMIO_PLANE_GAMC16(plane, i, \
> + _PLANE_GAMC16_1(pipe), _PLANE_GAMC16_2(pipe))
> +
> /* pipe CSC & degamma/gamma LUTs on CHV */
> #define _CGM_PIPE_A_CSC_COEFF01 (VLV_DISPLAY_BASE + 0x67900)
> #define _CGM_PIPE_A_CSC_COEFF23 (VLV_DISPLAY_BASE + 0x67904)
> diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c
> index fb8402f..2b5c0cd 100644
> --- a/drivers/gpu/drm/i915/intel_color.c
> +++ b/drivers/gpu/drm/i915/intel_color.c
> @@ -492,6 +492,59 @@ static void broadwell_load_luts(struct drm_crtc_state *state)
> I915_WRITE(PREC_PAL_INDEX(pipe), 0);
> }
>
> +static void bdw_load_plane_gamma_lut(const struct drm_plane_state *state,
> + u32 offset)
> +{
> + struct drm_i915_private *dev_priv = to_i915(state->plane->dev);
> + enum pipe pipe = to_intel_plane(state->plane)->pipe;
> + enum plane_id plane = to_intel_plane(state->plane)->id;
> + uint32_t i, lut_size =
> + INTEL_INFO(dev_priv)->plane_color.plane_gamma_lut_size;
> +
> + if (state->gamma_lut) {
> + struct drm_color_lut_ext *lut =
> + (struct drm_color_lut_ext *) state->gamma_lut->data;
> +
> + for (i = 0; i < lut_size; i++) {
> + uint32_t word =
> + (drm_color_lut_extract(lut[i].red, 10) << 20) |
> + (drm_color_lut_extract(lut[i].green, 10) << 10) |
> + drm_color_lut_extract(lut[i].blue, 10);
Shouldn't you be using drm_color_lut_extract_ext ?
> +
> + I915_WRITE(PLANE_GAMC(pipe, plane, i), word);
> + }
> +
> + /* Program the max register to clamp values > 1.0. */
> + i = lut_size - 1;
> + I915_WRITE(PLANE_GAMC16(pipe, plane, 0),
> + drm_color_lut_extract(lut[i].red, 16));
> + I915_WRITE(PLANE_GAMC16(pipe, plane, 1),
> + drm_color_lut_extract(lut[i].green, 16));
> + I915_WRITE(PLANE_GAMC16(pipe, plane, 2),
> + drm_color_lut_extract(lut[i].blue, 16));
> + } else {
> + for (i = 0; i < lut_size; i++) {
> + uint32_t v = (i * ((1 << 10) - 1)) / (lut_size - 1);
> +
> + I915_WRITE(PLANE_GAMC(pipe, plane, i),
> + (v << 20) | (v << 10) | v);
> + }
> +
> + I915_WRITE(PLANE_GAMC16(pipe, plane, 0), (1 << 16) - 1);
> + I915_WRITE(PLANE_GAMC16(pipe, plane, 1), (1 << 16) - 1);
> + I915_WRITE(PLANE_GAMC16(pipe, plane, 2), (1 << 16) - 1);
> + }
> +}
> +
> +/* Loads the palette/gamma unit for the CRTC on Broadwell+. */
> +static void broadwell_load_plane_luts(const struct drm_plane_state *state)
> +{
> + struct drm_i915_private *dev_priv = to_i915(state->plane->dev);
> +
> + bdw_load_plane_gamma_lut(state,
> + INTEL_INFO(dev_priv)->plane_color.plane_degamma_lut_size);
> +}
> +
> static void glk_load_degamma_lut(struct drm_crtc_state *state)
> {
> struct drm_i915_private *dev_priv = to_i915(state->crtc->dev);
> @@ -648,6 +701,11 @@ void intel_plane_color_init(struct drm_plane *plane)
>
> drm_plane_color_create_prop(plane->dev, plane);
>
> + if (IS_BROADWELL(dev_priv) || IS_GEN9_BC(dev_priv) ||
> + IS_BROXTON(dev_priv)) {
> + dev_priv->display.load_plane_luts = broadwell_load_plane_luts;
> + }
> +
> /* Enable color management support when we have degamma & gamma LUTs. */
> if (INTEL_INFO(dev_priv)->plane_color.plane_degamma_lut_size != 0 &&
> INTEL_INFO(dev_priv)->plane_color.plane_gamma_lut_size != 0)
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 690e1e8..2d15ac2 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -13803,6 +13803,10 @@ bool skl_plane_has_planar(struct drm_i915_private *dev_priv,
> DRM_COLOR_YCBCR_BT709,
> DRM_COLOR_YCBCR_LIMITED_RANGE);
>
> + /* Add Plane Color properties */
> + if (IS_BROADWELL(dev_priv) || INTEL_GEN(dev_priv) >= 9)
> + intel_plane_color_init(&primary->base);
> +
> drm_plane_helper_add(&primary->base, &intel_plane_helper_funcs);
>
> return primary;
> diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
> index f7026e8..0eeb1d3 100644
> --- a/drivers/gpu/drm/i915/intel_sprite.c
> +++ b/drivers/gpu/drm/i915/intel_sprite.c
> @@ -1650,6 +1650,10 @@ struct intel_plane *
> DRM_COLOR_YCBCR_BT709,
> DRM_COLOR_YCBCR_LIMITED_RANGE);
>
> + /* Add Plane Color properties */
> + if (IS_BROADWELL(dev_priv) || INTEL_GEN(dev_priv) >= 9)
> + intel_plane_color_init(&intel_plane->base);
> +
> drm_plane_helper_add(&intel_plane->base, &intel_plane_helper_funcs);
>
> return intel_plane;
> --
> 1.9.1
>
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--
Cheers,
Alex G
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