On Mon, Nov 22, 2021 at 05:08:31PM -0500, Nanley Chery wrote:
> Hi Stanislav,
>
> Are there IGT tests for this modifier?
>
> On Mon, Nov 22, 2021 at 4:14 PM Stanislav Lisovskiy
> <stanislav.lisovskiy@xxxxxxxxx> wrote:
> >
> > TileF(Tile4 in bspec) format is 4K tile organized into
> > 64B subtiles with same basic shape as for legacy TileY
> > which will be supported by Display13.
> >
> > v2: - Fixed wrong case condition(Jani Nikula)
> > - Increased I915_FORMAT_MOD_F_TILED up to 12(Imre Deak)
> >
> > v3: - s/I915_TILING_F/TILING_4/g
> > - s/I915_FORMAT_MOD_F_TILED/I915_FORMAT_MOD_4_TILED/g
> > - Removed unneeded fencing code
> >
> > v4: - Rebased, fixed merge conflict with new table-oriented
> > format modifier checking(Stan)
> > - Replaced the rest of "Tile F" mentions to "Tile 4"(Stan)
> >
> > v5: - Still had to remove some Tile F mentionings
> > - Moved has_4tile from adlp to DG2(Ramalingam C)
> > - Check specifically for DG2, but not the Display13(Imre)
> >
> > v6: - Moved Tile4 assocating struct for modifier/display to
> > the beginning(Imre Deak)
> > - Removed unneeded case I915_FORMAT_MOD_4_TILED modifier
> > checks(Imre Deak)
> > - Fixed I915_FORMAT_MOD_4_TILED to be 9 instead of 12
> > (Imre Deak)
> >
> > v7: - Fixed display_ver to { 13, 13 }(Imre Deak)
> > - Removed redundant newline(Imre Deak)
> >
> > Reviewed-by: Imre Deak <imre.deak@xxxxxxxxx>
> > Cc: Imre Deak <imre.deak@xxxxxxxxx>
> > Cc: Matt Roper <matthew.d.roper@xxxxxxxxx>
> > Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
> > Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@xxxxxxxxx>
> > Signed-off-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
> > Signed-off-by: Juha-Pekka Heikkilä <juha-pekka.heikkila@xxxxxxxxx>
> > ---
> > drivers/gpu/drm/i915/display/intel_display.c | 1 +
> > drivers/gpu/drm/i915/display/intel_fb.c | 9 +++++++++
> > drivers/gpu/drm/i915/display/intel_fbc.c | 1 +
> > .../drm/i915/display/intel_plane_initial.c | 1 +
> > .../drm/i915/display/skl_universal_plane.c | 20 +++++++++++--------
> > drivers/gpu/drm/i915/i915_drv.h | 1 +
> > drivers/gpu/drm/i915/i915_pci.c | 1 +
> > drivers/gpu/drm/i915/i915_reg.h | 1 +
> > drivers/gpu/drm/i915/intel_device_info.h | 1 +
> > drivers/gpu/drm/i915/intel_pm.c | 1 +
> > include/uapi/drm/drm_fourcc.h | 8 ++++++++
> > 11 files changed, 37 insertions(+), 8 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
> > index f3c9208a30b1..7429965d3682 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display.c
> > +++ b/drivers/gpu/drm/i915/display/intel_display.c
> > @@ -7766,6 +7766,7 @@ static int intel_atomic_check_async(struct intel_atomic_state *state, struct int
> > case I915_FORMAT_MOD_X_TILED:
> > case I915_FORMAT_MOD_Y_TILED:
> > case I915_FORMAT_MOD_Yf_TILED:
> > + case I915_FORMAT_MOD_4_TILED:
> > break;
> > default:
> > drm_dbg_kms(&i915->drm,
> > diff --git a/drivers/gpu/drm/i915/display/intel_fb.c b/drivers/gpu/drm/i915/display/intel_fb.c
> > index c4a743d0913f..b7f1ef62072c 100644
> > --- a/drivers/gpu/drm/i915/display/intel_fb.c
> > +++ b/drivers/gpu/drm/i915/display/intel_fb.c
> > @@ -139,6 +139,9 @@ struct intel_modifier_desc {
> >
> > static const struct intel_modifier_desc intel_modifiers[] = {
> > {
> > + .modifier = I915_FORMAT_MOD_4_TILED,
> > + .display_ver = { 13, 13 },
>
> I see that every other modifier has the plane_cap field set. Why is it
> okay for it to be zero here?
Yes, missed this. The INTEL_PLANE_CAP_TILING_4 flag needs to be added
and returned from skl_get_plane_caps() for HAS_4TILE() platforms and
here we need to set this flag.
> > + }, {
> > .modifier = I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS,
> > .display_ver = { 12, 13 },
> > .plane_caps = INTEL_PLANE_CAP_TILING_Y | INTEL_PLANE_CAP_CCS_MC,
> > @@ -544,6 +547,12 @@ intel_tile_width_bytes(const struct drm_framebuffer *fb, int color_plane)
> > return 128;
> > else
> > return 512;
> > + case I915_FORMAT_MOD_4_TILED:
> > + /*
> > + * Each 4K tile consists of 64B(8*8) subtiles, with
> > + * same shape as Y Tile(i.e 4*16B OWords)
> > + */
> > + return 128;
> > case I915_FORMAT_MOD_Y_TILED_CCS:
> > if (intel_fb_is_ccs_aux_plane(fb, color_plane))
> > return 128;
> > diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
> > index d0c34bc3af6c..0ceabe40d8c9 100644
> > --- a/drivers/gpu/drm/i915/display/intel_fbc.c
> > +++ b/drivers/gpu/drm/i915/display/intel_fbc.c
> > @@ -898,6 +898,7 @@ static bool tiling_is_valid(struct drm_i915_private *i915,
> > case I915_FORMAT_MOD_Y_TILED:
> > case I915_FORMAT_MOD_Yf_TILED:
> > return DISPLAY_VER(i915) >= 9;
> > + case I915_FORMAT_MOD_4_TILED:
>
> The tile Y cases above check the display version. Should we do the same here?
I don't think we need a display version check (here or above), since
the modifiers will be passed to this func only on platforms supporting
them.
> > case I915_FORMAT_MOD_X_TILED:
> > return true;
> > default:
> > diff --git a/drivers/gpu/drm/i915/display/intel_plane_initial.c b/drivers/gpu/drm/i915/display/intel_plane_initial.c
> > index dcd698a02da2..d80855ee9b96 100644
> > --- a/drivers/gpu/drm/i915/display/intel_plane_initial.c
> > +++ b/drivers/gpu/drm/i915/display/intel_plane_initial.c
> > @@ -125,6 +125,7 @@ intel_alloc_initial_plane_obj(struct intel_crtc *crtc,
> > case DRM_FORMAT_MOD_LINEAR:
> > case I915_FORMAT_MOD_X_TILED:
> > case I915_FORMAT_MOD_Y_TILED:
> > + case I915_FORMAT_MOD_4_TILED:
> > break;
> > default:
> > drm_dbg(&dev_priv->drm,
> > diff --git a/drivers/gpu/drm/i915/display/skl_universal_plane.c b/drivers/gpu/drm/i915/display/skl_universal_plane.c
> > index 28890876bdeb..e5cda5bcbde4 100644
> > --- a/drivers/gpu/drm/i915/display/skl_universal_plane.c
> > +++ b/drivers/gpu/drm/i915/display/skl_universal_plane.c
> > @@ -751,6 +751,8 @@ static u32 skl_plane_ctl_tiling(u64 fb_modifier)
> > return PLANE_CTL_TILED_X;
> > case I915_FORMAT_MOD_Y_TILED:
> > return PLANE_CTL_TILED_Y;
> > + case I915_FORMAT_MOD_4_TILED:
> > + return PLANE_CTL_TILED_4;
> > 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;
> > @@ -1971,9 +1973,7 @@ static bool gen12_plane_format_mod_supported(struct drm_plane *_plane,
> > case DRM_FORMAT_Y216:
> > case DRM_FORMAT_XVYU12_16161616:
> > case DRM_FORMAT_XVYU16161616:
> > - if (modifier == DRM_FORMAT_MOD_LINEAR ||
> > - modifier == I915_FORMAT_MOD_X_TILED ||
> > - modifier == I915_FORMAT_MOD_Y_TILED)
> > + if (!intel_fb_is_ccs_modifier(modifier))
> > return true;
> > fallthrough;
> > default:
> > @@ -2299,11 +2299,15 @@ skl_get_initial_plane_config(struct intel_crtc *crtc,
> > else
> > fb->modifier = I915_FORMAT_MOD_Y_TILED;
> > break;
> > - case PLANE_CTL_TILED_YF:
> > - if (val & PLANE_CTL_RENDER_DECOMPRESSION_ENABLE)
> > - fb->modifier = I915_FORMAT_MOD_Yf_TILED_CCS;
> > - else
> > - fb->modifier = I915_FORMAT_MOD_Yf_TILED;
> > + case PLANE_CTL_TILED_YF: /* aka PLANE_CTL_TILED_4 on XE_LPD+ */
>
> To be safe, maybe add a static_assert(PLANE_CTL_TILED_YF ==
> PLANE_CTL_TILED_4); ?
>
> > + if (HAS_4TILE(dev_priv)) {
> > + fb->modifier = I915_FORMAT_MOD_4_TILED;
> > + } else {
> > + if (val & PLANE_CTL_RENDER_DECOMPRESSION_ENABLE)
> > + fb->modifier = I915_FORMAT_MOD_Yf_TILED_CCS;
> > + else
> > + fb->modifier = I915_FORMAT_MOD_Yf_TILED;
> > + }
> > break;
> > default:
> > MISSING_CASE(tiling);
> > diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> > index 1bfadd9127fc..3d90bd732e91 100644
> > --- a/drivers/gpu/drm/i915/i915_drv.h
> > +++ b/drivers/gpu/drm/i915/i915_drv.h
> > @@ -1627,6 +1627,7 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915,
> > #define CMDPARSER_USES_GGTT(dev_priv) (GRAPHICS_VER(dev_priv) == 7)
> >
> > #define HAS_LLC(dev_priv) (INTEL_INFO(dev_priv)->has_llc)
> > +#define HAS_4TILE(dev_priv) (INTEL_INFO(dev_priv)->has_4tile)
> > #define HAS_SNOOP(dev_priv) (INTEL_INFO(dev_priv)->has_snoop)
> > #define HAS_EDRAM(dev_priv) ((dev_priv)->edram_size_mb)
> > #define HAS_SECURE_BATCHES(dev_priv) (GRAPHICS_VER(dev_priv) < 6)
> > diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
> > index f01cba4ec283..403d3a581ce7 100644
> > --- a/drivers/gpu/drm/i915/i915_pci.c
> > +++ b/drivers/gpu/drm/i915/i915_pci.c
> > @@ -1044,6 +1044,7 @@ static const struct intel_device_info dg2_info = {
> > DGFX_FEATURES,
> > .graphics.rel = 55,
> > .media.rel = 55,
> > + .has_4tile = 1,
> > PLATFORM(INTEL_DG2),
> > .platform_engine_mask =
> > BIT(RCS0) | BIT(BCS0) |
> > diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> > index 3450818802c2..22d18a292430 100644
> > --- a/drivers/gpu/drm/i915/i915_reg.h
> > +++ b/drivers/gpu/drm/i915/i915_reg.h
> > @@ -7284,6 +7284,7 @@ enum {
> > #define PLANE_CTL_TILED_X (1 << 10)
> > #define PLANE_CTL_TILED_Y (4 << 10)
> > #define PLANE_CTL_TILED_YF (5 << 10)
> > +#define PLANE_CTL_TILED_4 (5 << 10)
> > #define PLANE_CTL_ASYNC_FLIP (1 << 9)
> > #define PLANE_CTL_FLIP_HORIZONTAL (1 << 8)
> > #define PLANE_CTL_MEDIA_DECOMPRESSION_ENABLE (1 << 4) /* TGL+ */
> > diff --git a/drivers/gpu/drm/i915/intel_device_info.h b/drivers/gpu/drm/i915/intel_device_info.h
> > index 669f0d26c3c3..67177e18704a 100644
> > --- a/drivers/gpu/drm/i915/intel_device_info.h
> > +++ b/drivers/gpu/drm/i915/intel_device_info.h
> > @@ -125,6 +125,7 @@ enum intel_ppgtt_type {
> > func(has_64bit_reloc); \
> > func(gpu_reset_clobbers_display); \
> > func(has_reset_engine); \
> > + func(has_4tile); \
> > func(has_global_mocs); \
> > func(has_gt_uc); \
> > func(has_l3_dpf); \
> > diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> > index 01fa3fac1b57..167704f0acf0 100644
> > --- a/drivers/gpu/drm/i915/intel_pm.c
> > +++ b/drivers/gpu/drm/i915/intel_pm.c
> > @@ -5386,6 +5386,7 @@ skl_compute_wm_params(const struct intel_crtc_state *crtc_state,
> > }
> >
> > wp->y_tiled = modifier == I915_FORMAT_MOD_Y_TILED ||
> > + modifier == I915_FORMAT_MOD_4_TILED ||
> > modifier == I915_FORMAT_MOD_Yf_TILED ||
> > modifier == I915_FORMAT_MOD_Y_TILED_CCS ||
> > modifier == I915_FORMAT_MOD_Yf_TILED_CCS;
> > diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
> > index 7f652c96845b..41184a94935d 100644
> > --- a/include/uapi/drm/drm_fourcc.h
> > +++ b/include/uapi/drm/drm_fourcc.h
> > @@ -564,6 +564,14 @@ extern "C" {
> > * pitch is required to be a multiple of 4 tile widths.
> > */
> > #define I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS_CC fourcc_mod_code(INTEL, 8)
> > +/*
> > + * Intel F-tiling(aka Tile4) layout
> > + *
>
> v4 and v5 attempted to get rid of the F-tile references, but this was
> left behind.
>
> > + * This is a tiled layout using 4Kb tiles in row-major layout.
> > + * Within the tile pixels are laid out in 64 byte units / sub-tiles in OWORD
> > + * (16 bytes) chunks column-major..
>
> I can't picture how tile 4 is organized from this description. Could
> we update it?
> Here's a draft I came up with when wondering how I might do this myself:
>
> * This is a tiled layout using 4KB tiles in a row-major layout. It has the same
> * shape as Tile Y at two granularities: 4KB (128B x 32) and 64B (16B x 4). It
> * only differs from Tile Y at the 256B granularity in between. At this
> * granularity, Tile Y has a shape of 16B x 32 rows, but this tiling has a shape
> * of 64B x 8 rows.
>
> -Nanley
>
> > + */
> > +#define I915_FORMAT_MOD_4_TILED fourcc_mod_code(INTEL, 9)
> >
> > /*
> > * Tiled, NV12MT, grouped in 64 (pixels) x 32 (lines) -sized macroblocks
> > --
> > 2.24.1.485.gad05a3d8e5
> >
