[PATCH v1 RESEND 1/4] drm/tyr: clear reset IRQ before soft reset

[Onur Özkan]

Clear RESET_COMPLETED before writing GPU_CMD_SOFT_RESET.

This is also used in
drivers/gpu/drm/panfrost/panfrost_gpu.c::panfrost_gpu_soft_reset
and avoids seeing old reset-complete status from a previous reset.

Tested-by: Deborah Brouwer <deborah.brouwer@xxxxxxxxxxxxx>
Signed-off-by: Onur Özkan <work@xxxxxxxxxxxxx>
---
 drivers/gpu/drm/tyr/driver.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/tyr/driver.rs b/drivers/gpu/drm/tyr/driver.rs
index 69eff2a9e116..f7951804e4e0 100644
--- a/drivers/gpu/drm/tyr/driver.rs
+++ b/drivers/gpu/drm/tyr/driver.rs
@@ -91,6 +91,8 @@ unsafe impl Send for TyrDrmDeviceData {}
 unsafe impl Sync for TyrDrmDeviceData {}
 
 fn issue_soft_reset(dev: &Device<Bound>, iomem: &Devres<IoMem>) -> Result {
+    // Clear any stale reset-complete IRQ state before issuing a new soft reset.
+    regs::GPU_IRQ_CLEAR.write(dev, iomem, regs::GPU_IRQ_RAWSTAT_RESET_COMPLETED)?;
     regs::GPU_CMD.write(dev, iomem, regs::GPU_CMD_SOFT_RESET)?;
 
     poll::read_poll_timeout(
-- 
2.51.2