From: Boris Brezillon <boris.brezillon@collabora.com>
To: "Boris Brezillon" <boris.brezillon@collabora.com>,
"Steven Price" <steven.price@arm.com>,
"Liviu Dudau" <liviu.dudau@arm.com>,
"Adrián Larumbe" <adrian.larumbe@collabora.com>
Cc: dri-devel@lists.freedesktop.org, kernel@collabora.com
Subject: Re: [PATCH] drm/panthor: Fix the FW reset logic
Date: Thu, 2 May 2024 20:42:21 +0200 [thread overview]
Message-ID: <20240502204221.6d7d780d@collabora.com> (raw)
In-Reply-To: <20240430113727.493155-1-boris.brezillon@collabora.com>
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");
> }
>
prev parent reply other threads:[~2024-05-02 18:42 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
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 [this message]
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