Sometimes the HW doesn't even play fair, and completely forgets about
register writes. Skip verifying known troublemakers.
References: https://bugs.freedesktop.org/show_bug.cgi?id=108954
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_workarounds.c | 40 ++++++++++++++-----
.../gpu/drm/i915/intel_workarounds_types.h | 7 ++--
2 files changed, 33 insertions(+), 14 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_workarounds.c b/drivers/gpu/drm/i915/intel_workarounds.c
index db99f2e676bb..ba58be05f58c 100644
--- a/drivers/gpu/drm/i915/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/intel_workarounds.c
@@ -122,6 +122,7 @@ static void _wa_add(struct i915_wa_list *wal, const struct i915_wa *wa)
wal->wa_count++;
wa_->val |= wa->val;
wa_->mask |= wa->mask;
+ wa_->read |= wa->read;
return;
}
}
@@ -146,9 +147,10 @@ wa_write_masked_or(struct i915_wa_list *wal, i915_reg_t reg, u32 mask,
u32 val)
{
struct i915_wa wa = {
- .reg = reg,
+ .reg = reg,
.mask = mask,
- .val = val
+ .val = val,
+ .read = mask,
};
_wa_add(wal, &wa);
@@ -172,6 +174,19 @@ wa_write_or(struct i915_wa_list *wal, i915_reg_t reg, u32 val)
wa_write_masked_or(wal, reg, val, val);
}
+static void
+ignore_wa_write_or(struct i915_wa_list *wal, i915_reg_t reg, u32 mask, u32 val)
+{
+ struct i915_wa wa = {
+ .reg = reg,
+ .mask = mask,
+ .val = val,
+ /* Bonkers HW, skip verifying */
+ };
+
+ _wa_add(wal, &wa);
+}
+
#define WA_SET_BIT_MASKED(addr, mask) \
wa_write_masked_or(wal, (addr), (mask), _MASKED_BIT_ENABLE(mask))
@@ -916,10 +931,11 @@ wal_get_fw_for_rmw(struct intel_uncore *uncore, const struct i915_wa_list *wal)
static bool
wa_verify(const struct i915_wa *wa, u32 cur, const char *name, const char *from)
{
- if ((cur ^ wa->val) & wa->mask) {
+ if ((cur ^ wa->val) & wa->read) {
DRM_ERROR("%s workaround lost on %s! (%x=%x/%x, expected %x, mask=%x)\n",
- name, from, i915_mmio_reg_offset(wa->reg), cur,
- cur & wa->mask, wa->val, wa->mask);
+ name, from, i915_mmio_reg_offset(wa->reg),
+ cur, cur & wa->read,
+ wa->val, wa->mask);
return false;
}
@@ -1122,9 +1138,10 @@ rcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
_3D_CHICKEN3_AA_LINE_QUALITY_FIX_ENABLE);
/* WaPipelineFlushCoherentLines:icl */
- wa_write_or(wal,
- GEN8_L3SQCREG4,
- GEN8_LQSC_FLUSH_COHERENT_LINES);
+ ignore_wa_write_or(wal,
+ GEN8_L3SQCREG4,
+ GEN8_LQSC_FLUSH_COHERENT_LINES,
+ GEN8_LQSC_FLUSH_COHERENT_LINES);
/*
* Wa_1405543622:icl
@@ -1151,9 +1168,10 @@ rcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
* Wa_1405733216:icl
* Formerly known as WaDisableCleanEvicts
*/
- wa_write_or(wal,
- GEN8_L3SQCREG4,
- GEN11_LQSC_CLEAN_EVICT_DISABLE);
+ ignore_wa_write_or(wal,
+ GEN8_L3SQCREG4,
+ GEN11_LQSC_CLEAN_EVICT_DISABLE,
+ GEN11_LQSC_CLEAN_EVICT_DISABLE);
/* WaForwardProgressSoftReset:icl */
wa_write_or(wal,
diff --git a/drivers/gpu/drm/i915/intel_workarounds_types.h b/drivers/gpu/drm/i915/intel_workarounds_types.h
index 30918da180ff..42ac1fb99572 100644
--- a/drivers/gpu/drm/i915/intel_workarounds_types.h
+++ b/drivers/gpu/drm/i915/intel_workarounds_types.h
@@ -12,9 +12,10 @@
#include "i915_reg.h"
struct i915_wa {
- i915_reg_t reg;
- u32 mask;
- u32 val;
+ i915_reg_t reg;
+ u32 mask;
+ u32 val;
+ u32 read;
};
struct i915_wa_list {
