[RFC v4 7/8] drm/i915: Implement Plane Gamma for Bdw and Gen9 platforms
Shankar, Uma
uma.shankar at intel.com
Thu Aug 23 05:22:16 UTC 2018
>-----Original Message-----
>From: Alexandru-Cosmin Gheorghe [mailto:Alexandru-
>Cosmin.Gheorghe at arm.com]
>Sent: Tuesday, August 21, 2018 3:26 PM
>To: Shankar, Uma <uma.shankar at intel.com>
>Cc: intel-gfx at lists.freedesktop.org; dri-devel at lists.freedesktop.org;
>dcastagna at chromium.org; emil.l.velikov at gmail.com; seanpaul at chromium.org;
>Syrjala, Ville <ville.syrjala at intel.com>; Lankhorst, Maarten
><maarten.lankhorst at intel.com>; nd at arm.com
>Subject: Re: [RFC v4 7/8] drm/i915: Implement Plane Gamma for Bdw and Gen9
>platforms
>
>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 at intel.com>
>> ---
>> 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 ?
For now, drm_color_lut_extract was enough. But will use the newly defined
drm_color_lut_extract_ext to be future proof. Thanks for pointing this out.
Regards,
Uma Shankar
>
>> +
>> + 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
>>
>> _______________________________________________
>> dri-devel mailing list
>> dri-devel at lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/dri-devel
>
>--
>Cheers,
>Alex G
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