[Intel-gfx] [PATCH] drm/i915/xelpmp: Add Wa_16021867713

[Gustavo Sousa]

This workaround applies to all steppings of Xe_LPM+. Implement the KMD
part.

Signed-off-by: Gustavo Sousa <gustavo.sousa at intel.com>
---
 drivers/gpu/drm/i915/gt/intel_engine_regs.h |  3 +++
 drivers/gpu/drm/i915/gt/intel_workarounds.c | 14 ++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/intel_engine_regs.h b/drivers/gpu/drm/i915/gt/intel_engine_regs.h
index c0c8c12edea1..7060ce4fe058 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_regs.h
+++ b/drivers/gpu/drm/i915/gt/intel_engine_regs.h
@@ -260,6 +260,9 @@
 #define VDBOX_CGCTL3F10(base)			_MMIO((base) + 0x3f10)
 #define   IECPUNIT_CLKGATE_DIS			REG_BIT(22)
 
+#define VDBOX_CGCTL3F1C(base)			_MMIO((base) + 0x3f1c)
+#define   MFXPIPE_CLKGATE_DIS			REG_BIT(3)
+
 #define VDBOX_CGCTL3F18(base)			_MMIO((base) + 0x3f18)
 #define   ALNUNIT_CLKGATE_DIS			REG_BIT(13)
 
diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index 12859b8d2092..63205edfea50 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -1662,9 +1662,23 @@ xelpg_gt_workarounds_init(struct intel_gt *gt, struct i915_wa_list *wal)
 	debug_dump_steering(gt);
 }
 
+static void
+wa_16021867713(struct intel_gt *gt, struct i915_wa_list *wal)
+{
+	struct intel_engine_cs *engine;
+	int id;
+
+	for_each_engine(engine, gt, id)
+		if (engine->class == VIDEO_DECODE_CLASS)
+			wa_write_or(wal, VDBOX_CGCTL3F1C(engine->mmio_base),
+				    MFXPIPE_CLKGATE_DIS);
+}
+
 static void
 xelpmp_gt_workarounds_init(struct intel_gt *gt, struct i915_wa_list *wal)
 {
+	wa_16021867713(gt, wal);
+
 	/*
 	 * Wa_14018778641
 	 * Wa_18018781329
-- 
2.42.0