drm/xe: Apply Wa_14020316580 in xe_gt_idle_enable_pg()

Wa_14020316580 was getting clobbered by power gating init code
later in the driver load sequence. Move the Wa so that
it applies correctly.

Fixes: 7cd05ef ("drm/xe/xe2hpm: Add initial set of workarounds")
Suggested-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
Reviewed-by: Riana Tauro <riana.tauro@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patch.msgid.link/20251129052548.70766-1-vinay.belgaumkar@intel.com
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
(cherry picked from commit 8b55021)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>

Author: vsbelgaum

drivers/gpu/drm/xe/xe_gt_idle.c

@@ -5,6 +5,7 @@
 
 #include <drm/drm_managed.h>
 
+#include <generated/xe_wa_oob.h>
 #include "xe_force_wake.h"
 #include "xe_device.h"
 #include "xe_gt.h"
@@ -16,6 +17,7 @@
 #include "xe_mmio.h"
 #include "xe_pm.h"
 #include "xe_sriov.h"
+#include "xe_wa.h"
 
 /**
  * DOC: Xe GT Idle
@@ -145,6 +147,12 @@ void xe_gt_idle_enable_pg(struct xe_gt *gt)
 		xe_mmio_write32(mmio, RENDER_POWERGATE_IDLE_HYSTERESIS, 25);
 	}
 
+	if (XE_GT_WA(gt, 14020316580))
+		gtidle->powergate_enable &= ~(VDN_HCP_POWERGATE_ENABLE(0) |
+					      VDN_MFXVDENC_POWERGATE_ENABLE(0) |
+					      VDN_HCP_POWERGATE_ENABLE(2) |
+					      VDN_MFXVDENC_POWERGATE_ENABLE(2));
+
 	xe_mmio_write32(mmio, POWERGATE_ENABLE, gtidle->powergate_enable);
 	xe_force_wake_put(gt_to_fw(gt), fw_ref);
 }

drivers/gpu/drm/xe/xe_wa.c

@@ -270,14 +270,6 @@ static const struct xe_rtp_entry_sr gt_was[] = {
 	  XE_RTP_ACTIONS(SET(VDBOX_CGCTL3F1C(0), MFXPIPE_CLKGATE_DIS)),
 	  XE_RTP_ENTRY_FLAG(FOREACH_ENGINE),
 	},
-	{ XE_RTP_NAME("14020316580"),
-	  XE_RTP_RULES(MEDIA_VERSION(1301)),
-	  XE_RTP_ACTIONS(CLR(POWERGATE_ENABLE,
-			     VDN_HCP_POWERGATE_ENABLE(0) |
-			     VDN_MFXVDENC_POWERGATE_ENABLE(0) |
-			     VDN_HCP_POWERGATE_ENABLE(2) |
-			     VDN_MFXVDENC_POWERGATE_ENABLE(2))),
-	},
 	{ XE_RTP_NAME("14019449301"),
 	  XE_RTP_RULES(MEDIA_VERSION(1301), ENGINE_CLASS(VIDEO_DECODE)),
 	  XE_RTP_ACTIONS(SET(VDBOX_CGCTL3F08(0), CG3DDISHRS_CLKGATE_DIS)),

drivers/gpu/drm/xe/xe_wa_oob.rules

@@ -76,3 +76,4 @@
 
 15015404425_disable	PLATFORM(PANTHERLAKE), MEDIA_STEP(B0, FOREVER)
 16026007364    MEDIA_VERSION(3000)
+14020316580    MEDIA_VERSION(1301)