* Re: [PATCH] drm/panthor: Fix the FW reset logic
2024-04-30 11:37 [PATCH] drm/panthor: Fix the FW reset logic Boris Brezillon
@ 2024-05-02 8:58 ` Liviu Dudau
2024-05-02 9:24 ` Steven Price
2024-05-02 18:42 ` Boris Brezillon
2 siblings, 0 replies; 4+ messages in thread
From: Liviu Dudau @ 2024-05-02 8:58 UTC (permalink / raw)
To: Boris Brezillon; +Cc: Steven Price, Adrián Larumbe, dri-devel, kernel
On Tue, Apr 30, 2024 at 01:37:27PM +0200, Boris Brezillon wrote:
> In the post_reset function, if the fast reset didn't succeed, we
> are not clearing the fast_reset flag, which prevents firmware
> sections from being reloaded. While at it, use panthor_fw_stop()
> instead of manually writing DISABLE to the MCU_CONTROL register.
>
> Fixes: 2718d91816ee ("drm/panthor: Add the FW logical block")
> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
> ---
> drivers/gpu/drm/panthor/panthor_fw.c | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/panthor/panthor_fw.c b/drivers/gpu/drm/panthor/panthor_fw.c
> index 181395e2859a..fedf9627453f 100644
> --- a/drivers/gpu/drm/panthor/panthor_fw.c
> +++ b/drivers/gpu/drm/panthor/panthor_fw.c
> @@ -1083,10 +1083,11 @@ int panthor_fw_post_reset(struct panthor_device *ptdev)
> if (!ret)
> goto out;
>
> - /* Force a disable, so we get a fresh boot on the next
> - * panthor_fw_start() call.
> + /* Forcibly reset the MCU and force a slow reset, so we get a
> + * fresh boot on the next panthor_fw_start() call.
> */
> - gpu_write(ptdev, MCU_CONTROL, MCU_CONTROL_DISABLE);
> + panthor_fw_stop(ptdev);
> + ptdev->fw->fast_reset = false;
> drm_err(&ptdev->base, "FW fast reset failed, trying a slow reset");
> }
>
> --
> 2.44.0
>
--
====================
| I would like to |
| fix the world, |
| but they're not |
| giving me the |
\ source code! /
---------------
¯\_(ツ)_/¯
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [PATCH] drm/panthor: Fix the FW reset logic
2024-04-30 11:37 [PATCH] drm/panthor: Fix the FW reset logic Boris Brezillon
2024-05-02 8:58 ` Liviu Dudau
@ 2024-05-02 9:24 ` Steven Price
2024-05-02 18:42 ` Boris Brezillon
2 siblings, 0 replies; 4+ messages in thread
From: Steven Price @ 2024-05-02 9:24 UTC (permalink / raw)
To: Boris Brezillon, Liviu Dudau, Adrián Larumbe; +Cc: dri-devel, kernel
On 30/04/2024 12:37, Boris Brezillon wrote:
> In the post_reset function, if the fast reset didn't succeed, we
> are not clearing the fast_reset flag, which prevents firmware
> sections from being reloaded. While at it, use panthor_fw_stop()
> instead of manually writing DISABLE to the MCU_CONTROL register.
>
> Fixes: 2718d91816ee ("drm/panthor: Add the FW logical block")
> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
> ---
> drivers/gpu/drm/panthor/panthor_fw.c | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/panthor/panthor_fw.c b/drivers/gpu/drm/panthor/panthor_fw.c
> index 181395e2859a..fedf9627453f 100644
> --- a/drivers/gpu/drm/panthor/panthor_fw.c
> +++ b/drivers/gpu/drm/panthor/panthor_fw.c
> @@ -1083,10 +1083,11 @@ int panthor_fw_post_reset(struct panthor_device *ptdev)
> if (!ret)
> goto out;
>
> - /* Force a disable, so we get a fresh boot on the next
> - * panthor_fw_start() call.
> + /* Forcibly reset the MCU and force a slow reset, so we get a
> + * fresh boot on the next panthor_fw_start() call.
> */
> - gpu_write(ptdev, MCU_CONTROL, MCU_CONTROL_DISABLE);
> + panthor_fw_stop(ptdev);
> + ptdev->fw->fast_reset = false;
> drm_err(&ptdev->base, "FW fast reset failed, trying a slow reset");
> }
>
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [PATCH] drm/panthor: Fix the FW reset logic
2024-04-30 11:37 [PATCH] drm/panthor: Fix the FW reset logic Boris Brezillon
2024-05-02 8:58 ` Liviu Dudau
2024-05-02 9:24 ` Steven Price
@ 2024-05-02 18:42 ` Boris Brezillon
2 siblings, 0 replies; 4+ messages in thread
From: Boris Brezillon @ 2024-05-02 18:42 UTC (permalink / raw)
To: Boris Brezillon, Steven Price, Liviu Dudau, Adrián Larumbe
Cc: dri-devel, kernel
On Tue, 30 Apr 2024 13:37:27 +0200
Boris Brezillon <boris.brezillon@collabora.com> wrote:
> In the post_reset function, if the fast reset didn't succeed, we
> are not clearing the fast_reset flag, which prevents firmware
> sections from being reloaded. While at it, use panthor_fw_stop()
> instead of manually writing DISABLE to the MCU_CONTROL register.
>
> Fixes: 2718d91816ee ("drm/panthor: Add the FW logical block")
> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Queued to drm-misc-next-fixes.
> ---
> drivers/gpu/drm/panthor/panthor_fw.c | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/panthor/panthor_fw.c b/drivers/gpu/drm/panthor/panthor_fw.c
> index 181395e2859a..fedf9627453f 100644
> --- a/drivers/gpu/drm/panthor/panthor_fw.c
> +++ b/drivers/gpu/drm/panthor/panthor_fw.c
> @@ -1083,10 +1083,11 @@ int panthor_fw_post_reset(struct panthor_device *ptdev)
> if (!ret)
> goto out;
>
> - /* Force a disable, so we get a fresh boot on the next
> - * panthor_fw_start() call.
> + /* Forcibly reset the MCU and force a slow reset, so we get a
> + * fresh boot on the next panthor_fw_start() call.
> */
> - gpu_write(ptdev, MCU_CONTROL, MCU_CONTROL_DISABLE);
> + panthor_fw_stop(ptdev);
> + ptdev->fw->fast_reset = false;
> drm_err(&ptdev->base, "FW fast reset failed, trying a slow reset");
> }
>
^ permalink raw reply [flat|nested] 4+ messages in thread