On Thu, Dec 09, 2021 at 09:15:28PM +0530, Ramalingam C wrote:
> From: Matt Roper <matthew.d.roper@xxxxxxxxx>
>
> DG2 unifies render compression and media compression into a single
> format for the first time. The programming and buffer layout is
> supposed to match compression on older gen12 platforms, but the actual
> compression algorithm is different from any previous platform; as such,
> we need a new framebuffer modifier to represent buffers in this format,
> but otherwise we can re-use the existing gen12 compression driver logic.
>
> Signed-off-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
> cc: Radhakrishna Sripada <radhakrishna.sripada@xxxxxxxxx>
> Signed-off-by: Mika Kahola <mika.kahola@xxxxxxxxx> (v2)
> cc: Anshuman Gupta <anshuman.gupta@xxxxxxxxx>
> Signed-off-by: Juha-Pekka Heikkilä <juha-pekka.heikkila@xxxxxxxxx>
> Signed-off-by: Ramalingam C <ramalingam.c@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/display/intel_fb.c | 13 ++++++++
> .../drm/i915/display/skl_universal_plane.c | 33 +++++++++++++++----
> include/uapi/drm/drm_fourcc.h | 22 +++++++++++++
> 3 files changed, 61 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_fb.c b/drivers/gpu/drm/i915/display/intel_fb.c
> index 46505c69fe72..e15216f1cb82 100644
> --- a/drivers/gpu/drm/i915/display/intel_fb.c
> +++ b/drivers/gpu/drm/i915/display/intel_fb.c
> @@ -141,6 +141,14 @@ struct intel_modifier_desc {
>
> static const struct intel_modifier_desc intel_modifiers[] = {
> {
> + .modifier = I915_FORMAT_MOD_4_TILED_DG2_MC_CCS,
> + .display_ver = { 13, 14 },
13 is the latest display version.
> + .plane_caps = INTEL_PLANE_CAP_TILING_4 | INTEL_PLANE_CAP_CCS_MC,
> + }, {
> + .modifier = I915_FORMAT_MOD_4_TILED_DG2_RC_CCS,
> + .display_ver = { 13, 14 },
> + .plane_caps = INTEL_PLANE_CAP_TILING_4 | INTEL_PLANE_CAP_CCS_RC,
> + }, {
> .modifier = I915_FORMAT_MOD_4_TILED,
> .display_ver = { 13, 14 },
> .plane_caps = INTEL_PLANE_CAP_TILING_4,
> @@ -550,6 +558,8 @@ intel_tile_width_bytes(const struct drm_framebuffer *fb, int color_plane)
> return 128;
> else
> return 512;
> + case I915_FORMAT_MOD_4_TILED_DG2_RC_CCS:
> + case I915_FORMAT_MOD_4_TILED_DG2_MC_CCS:
> case I915_FORMAT_MOD_4_TILED:
> /*
> * Each 4K tile consists of 64B(8*8) subtiles, with
> @@ -752,6 +762,9 @@ unsigned int intel_surf_alignment(const struct drm_framebuffer *fb,
> case I915_FORMAT_MOD_4_TILED:
> case I915_FORMAT_MOD_Yf_TILED:
> return 1 * 1024 * 1024;
> + case I915_FORMAT_MOD_4_TILED_DG2_RC_CCS:
> + case I915_FORMAT_MOD_4_TILED_DG2_MC_CCS:
> + return 16 * 1024;
> default:
> MISSING_CASE(fb->modifier);
> return 0;
> diff --git a/drivers/gpu/drm/i915/display/skl_universal_plane.c b/drivers/gpu/drm/i915/display/skl_universal_plane.c
> index f62ba027fcf9..d80424194c75 100644
> --- a/drivers/gpu/drm/i915/display/skl_universal_plane.c
> +++ b/drivers/gpu/drm/i915/display/skl_universal_plane.c
> @@ -764,6 +764,14 @@ static u32 skl_plane_ctl_tiling(u64 fb_modifier)
> return PLANE_CTL_TILED_Y;
> case I915_FORMAT_MOD_4_TILED:
> return PLANE_CTL_TILED_4;
> + case I915_FORMAT_MOD_4_TILED_DG2_RC_CCS:
> + return PLANE_CTL_TILED_4 |
> + PLANE_CTL_RENDER_DECOMPRESSION_ENABLE |
> + PLANE_CTL_CLEAR_COLOR_DISABLE;
> + case I915_FORMAT_MOD_4_TILED_DG2_MC_CCS:
> + return PLANE_CTL_TILED_4 |
> + PLANE_CTL_MEDIA_DECOMPRESSION_ENABLE |
> + PLANE_CTL_CLEAR_COLOR_DISABLE;
> case I915_FORMAT_MOD_Y_TILED_CCS:
> case I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS_CC:
> return PLANE_CTL_TILED_Y | PLANE_CTL_RENDER_DECOMPRESSION_ENABLE;
> @@ -2073,6 +2081,10 @@ static bool gen12_plane_has_mc_ccs(struct drm_i915_private *i915,
> if (IS_ADLP_DISPLAY_STEP(i915, STEP_A0, STEP_B0))
> return false;
>
> + /* Wa_14013215631 */
> + if (IS_DG2_DISPLAY_STEP(i915, STEP_A0, STEP_C0))
> + return false;
> +
> return plane_id < PLANE_SPRITE4;
> }
>
> @@ -2312,18 +2324,25 @@ skl_get_initial_plane_config(struct intel_crtc *crtc,
> break;
> case PLANE_CTL_TILED_Y:
> plane_config->tiling = I915_TILING_Y;
> - if (val & PLANE_CTL_RENDER_DECOMPRESSION_ENABLE)
> - fb->modifier = DISPLAY_VER(dev_priv) >= 12 ?
> - I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS :
> - I915_FORMAT_MOD_Y_TILED_CCS;
> - else if (val & PLANE_CTL_MEDIA_DECOMPRESSION_ENABLE)
> + if (val & PLANE_CTL_RENDER_DECOMPRESSION_ENABLE) {
> + if (DISPLAY_VER(dev_priv) >= 12)
> + fb->modifier = I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS;
> + else
> + fb->modifier = I915_FORMAT_MOD_Y_TILED_CCS;
> + } else if (val & PLANE_CTL_MEDIA_DECOMPRESSION_ENABLE) {
> fb->modifier = I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS;
> - else
> + } else {
> fb->modifier = I915_FORMAT_MOD_Y_TILED;
> + }
The above looks like a formatting-only change, unrelated to this patch.
> break;
> case PLANE_CTL_TILED_YF: /* aka PLANE_CTL_TILED_4 on XE_LPD+ */
> if (HAS_4TILE(dev_priv)) {
> - fb->modifier = I915_FORMAT_MOD_4_TILED;
> + if (val & PLANE_CTL_RENDER_DECOMPRESSION_ENABLE)
> + fb->modifier = I915_FORMAT_MOD_4_TILED_DG2_RC_CCS;
> + else if (val & PLANE_CTL_MEDIA_DECOMPRESSION_ENABLE)
> + fb->modifier = I915_FORMAT_MOD_4_TILED_DG2_MC_CCS;
> + else
> + fb->modifier = I915_FORMAT_MOD_4_TILED;
> } else {
> if (val & PLANE_CTL_RENDER_DECOMPRESSION_ENABLE)
> fb->modifier = I915_FORMAT_MOD_Yf_TILED_CCS;
> diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
> index a146c6df1066..51fdda26844a 100644
> --- a/include/uapi/drm/drm_fourcc.h
> +++ b/include/uapi/drm/drm_fourcc.h
> @@ -576,6 +576,28 @@ extern "C" {
> */
> #define I915_FORMAT_MOD_4_TILED fourcc_mod_code(INTEL, 9)
>
> +/*
> + * Intel color control surfaces (CCS) for DG2 render compression.
> + *
> + * DG2 uses a new compression format for render compression. The general
> + * layout is the same as I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS,
> + * but a new hashing/compression algorithm is used, so a fresh modifier must
> + * be associated with buffers of this type. Render compression uses 128 byte
> + * compression blocks.
> + */
> +#define I915_FORMAT_MOD_4_TILED_DG2_RC_CCS fourcc_mod_code(INTEL, 10)
> +
> +/*
> + * Intel color control surfaces (CCS) for DG2 media compression.
> + *
> + * DG2 uses a new compression format for media compression. The general
> + * layout is the same as I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS,
> + * but a new hashing/compression algorithm is used, so a fresh modifier must
> + * be associated with buffers of this type. Media compression uses 256 byte
> + * compression blocks.
> + */
> +#define I915_FORMAT_MOD_4_TILED_DG2_MC_CCS fourcc_mod_code(INTEL, 11)
> +
> /*
> * Tiled, NV12MT, grouped in 64 (pixels) x 32 (lines) -sized macroblocks
> *
> --
> 2.20.1
>
