From 2fa42fd910c4ede1ae9c18d535b425046fa49351 Mon Sep 17 00:00:00 2001 From: Boris Brezillon Date: Tue, 30 Apr 2024 13:37:27 +0200 Subject: [PATCH] drm/panthor: Fix the FW reset logic 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 Reviewed-by: Liviu Dudau Reviewed-by: Steven Price Link: https://patchwork.freedesktop.org/patch/msgid/20240430113727.493155-1-boris.brezillon@collabora.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"); } -- 2.39.5