From: Mika Kuoppala Date: Fri, 7 Feb 2020 15:51:38 +0000 (+0200) Subject: drm/i915: Implement Wa_1607090982 X-Git-Tag: v5.10.7~1861^2~24^2~962 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0db1a5f8706a8cfb905b9cf3607c2ad626e7bff1;p=platform%2Fkernel%2Flinux-rpi.git drm/i915: Implement Wa_1607090982 SIMD16 with Src0 scalar might conflict between Src1/Src2 and cause GRF read issue. Workaround this issue by setting bit 14 in 0xe4f4 which will disable early read/src swap of Src0. Signed-off-by: Mika Kuoppala Reviewed-by: Chris Wilson Signed-off-by: Chris Wilson Link: https://patchwork.freedesktop.org/patch/msgid/20200207155138.30978-2-mika.kuoppala@linux.intel.com --- diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c index 4bbea78..62b43f5 100644 --- a/drivers/gpu/drm/i915/gt/intel_workarounds.c +++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c @@ -598,6 +598,9 @@ static void tgl_ctx_workarounds_init(struct intel_engine_cs *engine, wa_add(wal, FF_MODE2, FF_MODE2_TDS_TIMER_MASK, val, IS_TGL_REVID(engine->i915, TGL_REVID_A0, TGL_REVID_A0) ? 0 : FF_MODE2_TDS_TIMER_MASK); + + /* Wa_1606931601:tgl */ + WA_SET_BIT_MASKED(GEN7_ROW_CHICKEN2, GEN12_DISABLE_EARLY_READ); } static void diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index b62029a..590eff9 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -9148,6 +9148,8 @@ enum { #define DISABLE_EARLY_EOT (1 << 1) #define GEN7_ROW_CHICKEN2 _MMIO(0xe4f4) +#define GEN12_DISABLE_EARLY_READ BIT(14) + #define GEN7_ROW_CHICKEN2_GT2 _MMIO(0xf4f4) #define DOP_CLOCK_GATING_DISABLE (1 << 0) #define PUSH_CONSTANT_DEREF_DISABLE (1 << 8)