[v5,10/19] drm/i915/xehpsdv: Add has_flat_ccs to device info

Commit Message

Ramalingam C Feb. 1, 2022, 10:41 a.m. UTC

From: CQ Tang <[e-mail]>

Platforms of XeHP and beyond support 3D surface (buffer) compression and
various compression formats. This is accomplished by an additional
compression control state (CCS) stored for each surface.

Gen 12 devices(TGL family and DG1) stores compression states in a separate
region of memory. It is managed by user-space and has an associated set of
user-space managed page tables used by hardware for address translation.

In Xe HP and beyond (XEHPSDV, DG2, etc), there is a new feature introduced
i.e Flat CCS. It replaced AUX page tables with a flat indexed region of
device memory for storing compression states.

Cc: Joonas Lahtinen <[e-mail]>
Cc: Matthew Auld <[e-mail]>
Signed-off-by: CQ Tang <[e-mail]>
Signed-off-by: Ramalingam C <[e-mail]>
Reviewed-by: Matthew Auld <[e-mail]>
---
 drivers/gpu/drm/i915/i915_drv.h          | 6 ++++++
 drivers/gpu/drm/i915/i915_pci.c          | 1 +
 drivers/gpu/drm/i915/intel_device_info.h | 1 +
 3 files changed, 8 insertions(+)

Patch

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 4afdfa5fd3b3..384977798c8e 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1528,6 +1528,12 @@  IS_SUBPLATFORM(const struct drm_i915_private *i915,
 #define HAS_REGION(i915, i) (INTEL_INFO(i915)->memory_regions & (i))
 #define HAS_LMEM(i915) HAS_REGION(i915, REGION_LMEM)
 
+/*
+ * Platform has the dedicated compression control state for each lmem surfaces
+ * stored in lmem to support the 3D and media compression formats.
+ */
+#define HAS_FLAT_CCS(dev_priv)   (INTEL_INFO(dev_priv)->has_flat_ccs)
+
 #define HAS_GT_UC(dev_priv)	(INTEL_INFO(dev_priv)->has_gt_uc)
 
 #define HAS_POOLED_EU(dev_priv)	(INTEL_INFO(dev_priv)->has_pooled_eu)
diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
index ce6ae6a3cbdf..3976482582b8 100644
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -1003,6 +1003,7 @@  static const struct intel_device_info adl_p_info = {
 	XE_HP_PAGE_SIZES, \
 	.dma_mask_size = 46, \
 	.has_64bit_reloc = 1, \
+	.has_flat_ccs = 1, \
 	.has_global_mocs = 1, \
 	.has_gt_uc = 1, \
 	.has_llc = 1, \
diff --git a/drivers/gpu/drm/i915/intel_device_info.h b/drivers/gpu/drm/i915/intel_device_info.h
index d8da40d01dca..ef7c7c988b7b 100644
--- a/drivers/gpu/drm/i915/intel_device_info.h
+++ b/drivers/gpu/drm/i915/intel_device_info.h
@@ -133,6 +133,7 @@  enum intel_ppgtt_type {
 	func(needs_compact_pt); \
 	func(gpu_reset_clobbers_display); \
 	func(has_reset_engine); \
+	func(has_flat_ccs); \
 	func(has_global_mocs); \
 	func(has_gt_uc); \
 	func(has_guc_deprivilege); \