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drm/xe/vf: Don't check CTC_MODE[0] if VF

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Starting from commit 18778b5fdd ("drm/xe: Eliminate usage of
TIMESTAMP_OVERRIDE") we access the CTC_MODE register only to warn
if it has undocumented value.  There is no point in doing that on
the VF driver.  While here, move this check to a helper function.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250311114042.1954-2-michal.wajdeczko@intel.com
This commit is contained in:
Michal Wajdeczko
2025-03-11 12:40:41 +01:00
parent f990c11a63
commit fce3fb7b91
1 changed files with 11 additions and 4 deletions
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15
drivers/gpu/drm/xe/xe_gt_clock.c
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@@ -40,11 +40,8 @@ static u32 get_crystal_clock_freq(u32 rpm_config_reg)
}
}
int xe_gt_clock_init(struct xe_gt *gt)
static void check_ctc_mode(struct xe_gt *gt)
{
u32 c0 = xe_mmio_read32(&gt->mmio, RPM_CONFIG0);
u32 freq = 0;
/*
* CTC_MODE[0] = 1 is definitely not supported for Xe2 and later
* platforms. In theory it could be a valid setting for pre-Xe2
@@ -57,7 +54,17 @@ int xe_gt_clock_init(struct xe_gt *gt)
*/
if (xe_mmio_read32(&gt->mmio, CTC_MODE) & CTC_SOURCE_DIVIDE_LOGIC)
xe_gt_warn(gt, "CTC_MODE[0] is set; this is unexpected and undocumented\n");
}
int xe_gt_clock_init(struct xe_gt *gt)
{
u32 freq;
u32 c0;
if (!IS_SRIOV_VF(gt_to_xe(gt)))
check_ctc_mode(gt);
c0 = xe_mmio_read32(&gt->mmio, RPM_CONFIG0);
freq = get_crystal_clock_freq(c0);
/*