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| author | Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> | 2023-07-27 01:25:28 +0300 |
|---|---|---|
| committer | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2023-12-21 19:38:53 +0300 |
| commit | 43b5d81e04773d08df1ed3ff8a40936dca726fda (patch) | |
| tree | 60c74f0774bac97f00b22cd42a434b6ab7faaf2f /drivers/gpu | |
| parent | 0e34fdb4a01a3e615c109694b5adc53590ccda19 (diff) | |
| download | linux-43b5d81e04773d08df1ed3ff8a40936dca726fda.tar.xz | |
drm/xe: fix mcr semaphore locking for MTL
in commit 81593af6c88d ("drm/xe: Convert xe_mmio_wait32 to us so we can
stop using wait_for_us.") the mcr semaphore register read was
accidentally switched from waiting for the register to go to 1 to
waiting for the register to go to 0, so we need to flip it back.
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/xe/xe_gt_mcr.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/gpu/drm/xe/xe_gt_mcr.c b/drivers/gpu/drm/xe/xe_gt_mcr.c index c56815af0686..9eb7a6a1348d 100644 --- a/drivers/gpu/drm/xe/xe_gt_mcr.c +++ b/drivers/gpu/drm/xe/xe_gt_mcr.c @@ -420,10 +420,11 @@ static void mcr_lock(struct xe_gt *gt) /* * Starting with MTL we also need to grab a semaphore register * to synchronize with external agents (e.g., firmware) that now - * shares the same steering control register. + * shares the same steering control register. The semaphore is obtained + * when a read to the relevant register returns 1. */ if (GRAPHICS_VERx100(xe) >= 1270) - ret = xe_mmio_wait32(gt, STEER_SEMAPHORE, 0, 0x1, 10, NULL, + ret = xe_mmio_wait32(gt, STEER_SEMAPHORE, 0x1, 0x1, 10, NULL, true); drm_WARN_ON_ONCE(&xe->drm, ret == -ETIMEDOUT); @@ -431,7 +432,7 @@ static void mcr_lock(struct xe_gt *gt) static void mcr_unlock(struct xe_gt *gt) { - /* Release hardware semaphore */ + /* Release hardware semaphore - this is done by writing 1 to the register */ if (GRAPHICS_VERx100(gt_to_xe(gt)) >= 1270) xe_mmio_write32(gt, STEER_SEMAPHORE, 0x1); |