On Mon, Nov 18, 2024 at 03:21:52PM +0000, Karunika Choo wrote:
> Stop checking the FW halt_status as MCU_STATUS should be sufficient.
> This should make the check for successful FW halt and subsequently
> setting fast_reset to true more robust.
>
> We should also clear GLB_REQ.GLB_HALT bit only on post-reset prior
> to starting the FW.
>
> Signed-off-by: Karunika Choo <karunika.c...@arm.com>
Reviewed-by: Liviu Dudau <liviu.du...@arm.com>
Best regards,
Liviu
> ---
> drivers/gpu/drm/panthor/panthor_fw.c | 13 ++++++-------
> 1 file changed, 6 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/panthor/panthor_fw.c
> b/drivers/gpu/drm/panthor/panthor_fw.c
> index ecca5565ce41..6d41089b84ab 100644
> --- a/drivers/gpu/drm/panthor/panthor_fw.c
> +++ b/drivers/gpu/drm/panthor/panthor_fw.c
> @@ -1098,17 +1098,11 @@ void panthor_fw_pre_reset(struct panthor_device
> *ptdev, bool on_hang)
> panthor_fw_update_reqs(glb_iface, req, GLB_HALT, GLB_HALT);
> gpu_write(ptdev, CSF_DOORBELL(CSF_GLB_DOORBELL_ID), 1);
> if (!readl_poll_timeout(ptdev->iomem + MCU_STATUS, status,
> - status == MCU_STATUS_HALT, 10, 100000)
> &&
> - glb_iface->output->halt_status == PANTHOR_FW_HALT_OK) {
> + status == MCU_STATUS_HALT, 10, 100000))
> {
> ptdev->fw->fast_reset = true;
> } else {
> drm_warn(&ptdev->base, "Failed to cleanly suspend MCU");
> }
> -
> - /* The FW detects 0 -> 1 transitions. Make sure we reset
> - * the HALT bit before the FW is rebooted.
> - */
> - panthor_fw_update_reqs(glb_iface, req, 0, GLB_HALT);
> }
>
> panthor_job_irq_suspend(&ptdev->fw->irq);
> @@ -1134,6 +1128,11 @@ int panthor_fw_post_reset(struct panthor_device *ptdev)
> * the FW sections. If it fails, go for a full reset.
> */
> if (ptdev->fw->fast_reset) {
> + /* The FW detects 0 -> 1 transitions. Make sure we reset
> + * the HALT bit before the FW is rebooted.
> + */
> + panthor_fw_update_reqs(glb_iface, req, 0, GLB_HALT);
> +
> ret = panthor_fw_start(ptdev);
> if (!ret)
> goto out;
> --
> 2.25.1
>
--
====================
| I would like to |
| fix the world, |
| but they're not |
| giving me the |
\ source code! /
---------------
¯\_(ツ)_/¯
