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drm/xe: Ensure GT is in C0 during resumes

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This patch ensures the gt will be awake for the entire duration
of the resume sequences until GuCRC takes over and GT-C6 gets
re-enabled.

Before suspending GT-C6 is kept enabled, but upon resume, GuCRC
is not yet alive to properly control the exits and some cases of
instability and corruption related to GT-C6 can be observed.

Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/4037

Suggested-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Xin Wang <x.wang@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/4037
Link: https://lore.kernel.org/r/20250827000633.1369890-3-x.wang@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
This commit is contained in:
Xin Wang 2025-08-26 17:06:33 -07:00 committed by Rodrigo Vivi
parent 1313351e71
commit 95d0883ac8
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GPG Key ID: FA625F640EEB13CA
1 changed files with 7 additions and 1 deletions
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8
drivers/gpu/drm/xe/xe_pm.c
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@ -18,7 +18,7 @@
#include "xe_device.h"
#include "xe_ggtt.h"
#include "xe_gt.h"
#include "xe_guc.h"
#include "xe_gt_idle.h"
#include "xe_i2c.h"
#include "xe_irq.h"
#include "xe_pcode.h"
@ -177,6 +177,9 @@ int xe_pm_resume(struct xe_device *xe)
drm_dbg(&xe->drm, "Resuming device\n");
trace_xe_pm_resume(xe, __builtin_return_address(0));
for_each_gt(gt, xe, id)
xe_gt_idle_disable_c6(gt);
for_each_tile(tile, xe, id)
xe_wa_apply_tile_workarounds(tile);
@ -537,6 +540,9 @@ int xe_pm_runtime_resume(struct xe_device *xe)
xe_rpm_lockmap_acquire(xe);
for_each_gt(gt, xe, id)
xe_gt_idle_disable_c6(gt);
if (xe->d3cold.allowed) {
err = xe_pcode_ready(xe, true);
if (err)