[PATCH v2 02/18][SRU][H] drm/i915/dg1: Implement WA_16011163337

[chris.chiu at canonical.com]

From: Swathi Dhanavanthri <swathi.dhanavanthri at intel.com>

BugLink: https://bugs.launchpad.net/bugs/1926579

Set GS Timer to 224 to prevent a HS/DS hang.

Bspec: 53508

v2: reword commit message and add comment explaining why read
verification is ignored (Chris)

Cc: Matt Roper <matthew.d.roper at intel.com>
Signed-off-by: Swathi Dhanavanthri <swathi.dhanavanthri at intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20201205092542.2325477-1-lucas.demarchi@intel.com
(cherry picked from commit 1efa473e65e3cefbd03c5cc9fed6f7fa73bf31d2)
Signed-off-by: Chris Chiu <chris.chiu at canonical.com>
---
 drivers/gpu/drm/i915/gt/intel_workarounds.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index adc9a8ea410a..3c20ff5b1a0c 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -686,6 +686,16 @@ static void dg1_ctx_workarounds_init(struct intel_engine_cs *engine,
 	/* Wa_22010493298 */
 	WA_SET_BIT_MASKED(HIZ_CHICKEN,
 			  DG1_HZ_READ_SUPPRESSION_OPTIMIZATION_DISABLE);
+
+	/*
+	 * Wa_16011163337
+	 *
+	 * Like in tgl_ctx_workarounds_init(), read verification is ignored due
+	 * to Wa_1608008084.
+	 */
+	wa_add(wal,
+	       FF_MODE2,
+	       FF_MODE2_GS_TIMER_MASK, FF_MODE2_GS_TIMER_224, 0);
 }
 
 static void
-- 
2.25.1