Re: [PATCH 2/5] drm/i915: Drop dead code for xehpsdv

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On Tue, Mar 12, 2024 at 03:58:19PM -0700, Matt Roper wrote:
On Wed, Mar 06, 2024 at 11:36:40AM -0800, Lucas De Marchi wrote:
PCI IDs for XEHPSDV were never added and platform always marked with
force_probe. Drop what's not used and rename some places to either be
xehp or dg2, depending on the platform/IP checks.

The registers not used anymore are also removed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
---

Potential problem here that needs a deeper look, the changes in
__gen12_fw_ranges. Some ranges had comments saying they were XEHPSDV so
I removed them, but it needs to be double checked with spec and CI
results.

...
diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
index 76400e9c40f0..4f1e56187442 100644
--- a/drivers/gpu/drm/i915/intel_uncore.c
+++ b/drivers/gpu/drm/i915/intel_uncore.c
@@ -1536,17 +1536,12 @@ static const struct intel_forcewake_range __gen12_fw_ranges[] = {
 	GEN_FW_RANGE(0x13200, 0x13fff, FORCEWAKE_MEDIA_VDBOX2), /*		\
 		0x13200 - 0x133ff: VD2 (DG2 only)				\
 		0x13400 - 0x13fff: reserved */					\
-	GEN_FW_RANGE(0x14000, 0x141ff, FORCEWAKE_MEDIA_VDBOX0), /* XEHPSDV only */	\
-	GEN_FW_RANGE(0x14200, 0x143ff, FORCEWAKE_MEDIA_VDBOX2), /* XEHPSDV only */	\
-	GEN_FW_RANGE(0x14400, 0x145ff, FORCEWAKE_MEDIA_VDBOX4), /* XEHPSDV only */	\
-	GEN_FW_RANGE(0x14600, 0x147ff, FORCEWAKE_MEDIA_VDBOX6), /* XEHPSDV only */	\

We can't just remove ranges in the middle of the table since that breaks
the "watertight" table requirement that our selftests check for.  We
need to either roll the now-unused ranges into an adjacent range, or add
a new "reserved" range.

see 23n224gu57lfd4wbroqflav4pih6usrkf53q2ve4ntekhueylb@eqigxyktri6b



 	GEN_FW_RANGE(0x14800, 0x14fff, FORCEWAKE_RENDER),			\
 	GEN_FW_RANGE(0x15000, 0x16dff, FORCEWAKE_GT), /*			\
 		0x15000 - 0x15fff: gt (DG2 only)				\
 		0x16000 - 0x16dff: reserved */					\
 	GEN_FW_RANGE(0x16e00, 0x1ffff, FORCEWAKE_RENDER),			\
-	GEN_FW_RANGE(0x20000, 0x21fff, FORCEWAKE_MEDIA_VDBOX0), /*		\
-		0x20000 - 0x20fff: VD0 (XEHPSDV only)				\
+	GEN_FW_RANGE(0x21000, 0x21fff, FORCEWAKE_MEDIA_VDBOX0), /*		\
 		0x21000 - 0x21fff: reserved */					\
 	GEN_FW_RANGE(0x22000, 0x23fff, FORCEWAKE_GT),				\
 	GEN_FW_RANGE(0x24000, 0x2417f, 0), /*					\
@@ -1627,10 +1622,6 @@ static const struct intel_forcewake_range __gen12_fw_ranges[] = {
 		0x1f6e00 - 0x1f7fff: reserved */				\
 	GEN_FW_RANGE(0x1f8000, 0x1fa0ff, FORCEWAKE_MEDIA_VEBOX3),

-static const struct intel_forcewake_range __xehp_fw_ranges[] = {
-	XEHP_FWRANGES(FORCEWAKE_GT)
-};
-
 static const struct intel_forcewake_range __dg2_fw_ranges[] = {
 	XEHP_FWRANGES(FORCEWAKE_RENDER)

We can drop the macro here now and just make this a normal table like
everything else.

will add that in v2 too, thanks

Lucas De Marchi



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