[Intel-gfx] [PATCH] drm/i915/dg2: Tile 4 plane format support

[Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>]

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: - 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)

v3: - Rebased patch on top of new changes related to plane_caps.
    - Added static assert to check that PLANE_CTL_TILING_YF
      matches PLANE_CTL_TILING_4(Nanley Chery)
    - Fixed naming and layout description for Tile 4 in drm uapi
      header(Nanley Chery)

Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Juha-Pekka Heikkilä <juha-pekka.heikkila@intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c  |  1 +
 drivers/gpu/drm/i915/display/intel_fb.c       | 15 +++++++++++-
 drivers/gpu/drm/i915/display/intel_fb.h       |  1 +
 drivers/gpu/drm/i915/display/intel_fbc.c      |  1 +
 .../drm/i915/display/intel_plane_initial.c    |  1 +
 .../drm/i915/display/skl_universal_plane.c    | 23 ++++++++++++-------
 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                 | 11 +++++++++
 12 files changed, 49 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index b2d51cd79d6c..760e1bb92876 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -7769,6 +7769,7 @@ 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..153f759513a3 100644
--- a/drivers/gpu/drm/i915/display/intel_fb.c
+++ b/drivers/gpu/drm/i915/display/intel_fb.c
@@ -134,11 +134,16 @@ struct intel_modifier_desc {
 					 INTEL_PLANE_CAP_CCS_MC)
 #define INTEL_PLANE_CAP_TILING_MASK	(INTEL_PLANE_CAP_TILING_X | \
 					 INTEL_PLANE_CAP_TILING_Y | \
-					 INTEL_PLANE_CAP_TILING_Yf)
+					 INTEL_PLANE_CAP_TILING_Yf | \
+					 INTEL_PLANE_CAP_TILING_4)
 #define INTEL_PLANE_CAP_TILING_NONE	0
 
 static const struct intel_modifier_desc intel_modifiers[] = {
 	{
+		.modifier = I915_FORMAT_MOD_4_TILED,
+		.display_ver = { 13, 14 },
+		.plane_caps = INTEL_PLANE_CAP_TILING_4,
+	}, {
 		.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 +549,12 @@ 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;
@@ -649,6 +660,7 @@ static unsigned int intel_fb_modifier_to_tiling(u64 fb_modifier)
 		return I915_TILING_Y;
 	case INTEL_PLANE_CAP_TILING_X:
 		return I915_TILING_X;
+	case INTEL_PLANE_CAP_TILING_4:
 	case INTEL_PLANE_CAP_TILING_Yf:
 	case INTEL_PLANE_CAP_TILING_NONE:
 		return I915_TILING_NONE;
@@ -726,6 +738,7 @@ unsigned int intel_surf_alignment(const struct drm_framebuffer *fb,
 	case I915_FORMAT_MOD_Y_TILED_CCS:
 	case I915_FORMAT_MOD_Yf_TILED_CCS:
 	case I915_FORMAT_MOD_Y_TILED:
+	case I915_FORMAT_MOD_4_TILED:
 	case I915_FORMAT_MOD_Yf_TILED:
 		return 1 * 1024 * 1024;
 	default:
diff --git a/drivers/gpu/drm/i915/display/intel_fb.h b/drivers/gpu/drm/i915/display/intel_fb.h
index b54997175d6d..e46fb05799f8 100644
--- a/drivers/gpu/drm/i915/display/intel_fb.h
+++ b/drivers/gpu/drm/i915/display/intel_fb.h
@@ -27,6 +27,7 @@ struct intel_plane_state;
 #define INTEL_PLANE_CAP_TILING_X	BIT(3)
 #define INTEL_PLANE_CAP_TILING_Y	BIT(4)
 #define INTEL_PLANE_CAP_TILING_Yf	BIT(5)
+#define INTEL_PLANE_CAP_TILING_4	BIT(6)
 
 bool intel_fb_is_ccs_modifier(u64 modifier);
 bool intel_fb_is_rc_ccs_cc_modifier(u64 modifier);
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:
 	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..b6a866882fcb 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:
@@ -2066,6 +2066,8 @@ static u8 skl_get_plane_caps(struct drm_i915_private *i915,
 		caps |= INTEL_PLANE_CAP_TILING_Y;
 	if (DISPLAY_VER(i915) < 12)
 		caps |= INTEL_PLANE_CAP_TILING_Yf;
+	if (HAS_4TILE(i915))
+		caps |= INTEL_PLANE_CAP_TILING_4;
 
 	if (skl_plane_has_rc_ccs(i915, pipe, plane_id)) {
 		caps |= INTEL_PLANE_CAP_CCS_RC;
@@ -2238,6 +2240,7 @@ skl_get_initial_plane_config(struct intel_crtc *crtc,
 	unsigned int aligned_height;
 	struct drm_framebuffer *fb;
 	struct intel_framebuffer *intel_fb;
+	static_assert(PLANE_CTL_TILED_YF == PLANE_CTL_TILED_4);
 
 	if (!plane->get_hw_state(plane, &pipe))
 		return;
@@ -2299,11 +2302,15 @@ 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+ */
+		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..7781ccd05a33 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..a146c6df1066 100644
--- a/include/uapi/drm/drm_fourcc.h
+++ b/include/uapi/drm/drm_fourcc.h
@@ -565,6 +565,17 @@ extern "C" {
  */
 #define I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS_CC fourcc_mod_code(INTEL, 8)
 
+/*
+ * Intel Tile 4 layout
+ *
+ * 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.
+ */
+#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