[PATCH AUTOSEL 6.14 381/642] drm/xe/client: Skip show_run_ticks if unable to read timestamp

[Sasha Levin]

From: Marcin Bernatowicz <marcin.bernatowicz at linux.intel.com>

[ Upstream commit 94030a1d3283251778411cf74553607a65260f78 ]

RING_TIMESTAMP registers are inaccessible in VF mode.
Without drm-total-cycles-*, other keys provide little value.
Skip all optional "run_ticks" keys in this case.

Signed-off-by: Marcin Bernatowicz <marcin.bernatowicz at linux.intel.com>
Cc: Lucas De Marchi <lucas.demarchi at intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko at intel.com>
Cc: Michał Winiarski <michal.winiarski at intel.com>
Cc: Umesh Nerlige Ramappa <umesh.nerlige.ramappa at intel.com>
Reviewed-by: Satyanarayana K V P <satyanarayana.k.v.p at intel.com>
Signed-off-by: Michal Wajdeczko <michal.wajdeczko at intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250205191644.2550879-3-marcin.bernatowicz@linux.intel.com
Signed-off-by: Sasha Levin <sashal at kernel.org>
---
 drivers/gpu/drm/xe/xe_drm_client.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_drm_client.c b/drivers/gpu/drm/xe/xe_drm_client.c
index 2d4874d2b9225..31f688e953d7b 100644
--- a/drivers/gpu/drm/xe/xe_drm_client.c
+++ b/drivers/gpu/drm/xe/xe_drm_client.c
@@ -324,6 +324,14 @@ static void show_run_ticks(struct drm_printer *p, struct drm_file *file)
 	u64 gpu_timestamp;
 	unsigned int fw_ref;
 
+	/*
+	 * RING_TIMESTAMP registers are inaccessible in VF mode.
+	 * Without drm-total-cycles-*, other keys provide little value.
+	 * Show all or none of the optional "run_ticks" keys in this case.
+	 */
+	if (IS_SRIOV_VF(xe))
+		return;
+
 	/*
 	 * Wait for any exec queue going away: their cycles will get updated on
 	 * context switch out, so wait for that to happen
-- 
2.39.5