On 1/20/2022 2:24 PM, Daniele Ceraolo Spurio wrote:
Starting from xehpsdv, bit 0 of of the GuC shim control register has
been repurposed, while bit 2 is now reserved, so we need to avoid
setting those for their old meaning on newer platforms.
Cc: Vinay Belgaumkar <vinay.belgaumkar@xxxxxxxxx>
Cc: Stuart Summers <stuart.summers@xxxxxxxxx>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
---
drivers/gpu/drm/i915/gt/uc/intel_guc_fw.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_fw.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_fw.c
index f773e7f35bc1a..40f7d4779c9ec 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_fw.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_fw.c
@@ -15,13 +15,15 @@
static void guc_prepare_xfer(struct intel_uncore *uncore)
{
- u32 shim_flags = GUC_DISABLE_SRAM_INIT_TO_ZEROES |
- GUC_ENABLE_READ_CACHE_LOGIC |
- GUC_ENABLE_MIA_CACHING |
+ u32 shim_flags = GUC_ENABLE_READ_CACHE_LOGIC |
GUC_ENABLE_READ_CACHE_FOR_SRAM_DATA |
GUC_ENABLE_READ_CACHE_FOR_WOPCM_DATA |
GUC_ENABLE_MIA_CLOCK_GATING;
+ if (GRAPHICS_VER_FULL(uncore->i915) < IP_VER(12, 50))
+ shim_flags |= GUC_DISABLE_SRAM_INIT_TO_ZEROES |
+ GUC_ENABLE_MIA_CACHING;
+
LGTM.
Reviewed-by: Vinay Belgaumkar <vinay.belgaumkar@xxxxxxxxx>
/* Must program this register before loading the ucode with DMA */
intel_uncore_write(uncore, GUC_SHIM_CONTROL, shim_flags);
