From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Bspec asks us to disable some compression trick on JSL. While the
bspec description is pretty vague it looks like this is some extra
trick for 10bpc+ CCS which presumably the ICL derived display engine
doesn't support.
Note that we aren't currently exposing 10bpc CCS scanout support,
but once that gets added this presumably becomes an issue.
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/gt/intel_gt_regs.h | 1 +
drivers/gpu/drm/i915/gt/intel_workarounds.c | 9 +++++++++
2 files changed, 10 insertions(+)
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_regs.h b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
index e42b3a5d4e63..af53c40e6c21 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_regs.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
@@ -432,6 +432,7 @@
#define XEHPG_INSTDONE_GEOM_SVG MCR_REG(0x666c)
#define CACHE_MODE_0_GEN7 _MMIO(0x7000) /* IVB+ */
+#define DISABLE_REPACKING_FOR_COMPRESSION REG_BIT(15) /* jsl+ */
#define RC_OP_FLUSH_ENABLE (1 << 0)
#define HIZ_RAW_STALL_OPT_DISABLE (1 << 2)
#define CACHE_MODE_1 _MMIO(0x7004) /* IVB+ */
diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index 09a287c1aedd..a424b442493f 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -2286,6 +2286,15 @@ rcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
GEN8_RC_SEMA_IDLE_MSG_DISABLE);
}
+ if (IS_JASPERLAKE(i915) || IS_ELKHARTLAKE(i915)) {
+ /*
+ * "Disable Repacking for Compression (masked R/W access)
+ * before rendering compressed surfaces for display."
+ */
+ wa_masked_en(wal, CACHE_MODE_0_GEN7,
+ DISABLE_REPACKING_FOR_COMPRESSION);
+ }
+
if (GRAPHICS_VER(i915) == 11) {
/* This is not an Wa. Enable for better image quality */
wa_masked_en(wal,
--
2.44.2
