Immediately after writing the workaround, verify that it stuck in the register.
References: https://bugs.freedesktop.org/show_bug.cgi?id=108954 Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk> Cc: Tvrtko Ursulin <tvrtko.ursu...@intel.com> Reviewed-by: Tvrtko Ursulin <tvrtko.ursu...@intel.com> --- drivers/gpu/drm/i915/intel_workarounds.c | 32 +++++++++++++----------- 1 file changed, 18 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_workarounds.c b/drivers/gpu/drm/i915/intel_workarounds.c index ccaf63679435..ea9292ee755a 100644 --- a/drivers/gpu/drm/i915/intel_workarounds.c +++ b/drivers/gpu/drm/i915/intel_workarounds.c @@ -913,6 +913,20 @@ wal_get_fw_for_rmw(struct intel_uncore *uncore, const struct i915_wa_list *wal) return fw; } +static bool +wa_verify(const struct i915_wa *wa, u32 cur, const char *name, const char *from) +{ + if ((cur ^ wa->val) & wa->mask) { + 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); + + return false; + } + + return true; +} + static void wa_list_apply(struct intel_uncore *uncore, const struct i915_wa_list *wal) { @@ -931,6 +945,10 @@ wa_list_apply(struct intel_uncore *uncore, const struct i915_wa_list *wal) for (i = 0, wa = wal->list; i < wal->count; i++, wa++) { intel_uncore_rmw_fw(uncore, wa->reg, wa->mask, wa->val); + if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM)) + wa_verify(wa, + intel_uncore_read_fw(uncore, wa->reg), + wal->name, "application"); } intel_uncore_forcewake_put__locked(uncore, fw); @@ -942,20 +960,6 @@ void intel_gt_apply_workarounds(struct drm_i915_private *i915) wa_list_apply(&i915->uncore, &i915->gt_wa_list); } -static bool -wa_verify(const struct i915_wa *wa, u32 cur, const char *name, const char *from) -{ - if ((cur ^ wa->val) & wa->mask) { - 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); - - return false; - } - - return true; -} - static bool wa_list_verify(struct intel_uncore *uncore, const struct i915_wa_list *wal, const char *from) -- 2.20.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
