Re: [PATCH v2] drm/mediatek/dp: fix mtk_dp_aux_transfer return value
Hello: This patch was applied to chrome-platform/linux.git (for-next) by Chun-Kuang Hu : On Wed, 17 Apr 2024 10:38:19 + you wrote: > In case there is no DP device attached to the port the > transfer function should return IO error, similar to what > other drivers do. > In case EAGAIN is returned then any read from /dev/drm_dp_aux > device ends up in an infinite loop as the upper layers > constantly repeats the transfer request. > > [...] Here is the summary with links: - [v2] drm/mediatek/dp: fix mtk_dp_aux_transfer return value https://git.kernel.org/chrome-platform/c/8431fff9e0f3 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html
Re: [PATCH v2] drm/mediatek/dp: fix mtk_dp_aux_transfer return value
Hello: This patch was applied to chrome-platform/linux.git (for-kernelci) by Chun-Kuang Hu : On Wed, 17 Apr 2024 10:38:19 + you wrote: > In case there is no DP device attached to the port the > transfer function should return IO error, similar to what > other drivers do. > In case EAGAIN is returned then any read from /dev/drm_dp_aux > device ends up in an infinite loop as the upper layers > constantly repeats the transfer request. > > [...] Here is the summary with links: - [v2] drm/mediatek/dp: fix mtk_dp_aux_transfer return value https://git.kernel.org/chrome-platform/c/8431fff9e0f3 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html
Re: [PATCH v2] drm/mediatek/dp: fix mtk_dp_aux_transfer return value
Re: [PATCH v2] drm/mediatek/dp: fix mtk_dp_aux_transfer return value
Il 17/04/24 12:38, Wojciech Macek ha scritto:
In case there is no DP device attached to the port the
transfer function should return IO error, similar to what
other drivers do.
In case EAGAIN is returned then any read from /dev/drm_dp_aux
device ends up in an infinite loop as the upper layers
constantly repeats the transfer request.
Fixes: f70ac097a2cf ("drm/mediatek: Add MT8195 Embedded DisplayPort driver")
Signed-off-by: Wojciech Macek
Reviewed-by: AngeloGioacchino Del Regno
[PATCH v2] drm/mediatek/dp: fix mtk_dp_aux_transfer return value
In case there is no DP device attached to the port the
transfer function should return IO error, similar to what
other drivers do.
In case EAGAIN is returned then any read from /dev/drm_dp_aux
device ends up in an infinite loop as the upper layers
constantly repeats the transfer request.
Fixes: f70ac097a2cf ("drm/mediatek: Add MT8195 Embedded DisplayPort driver")
Signed-off-by: Wojciech Macek
---
Changelog v2-v1:
- added "Fixes" tag
- corrected e-mail address
V1:
https://patchwork.kernel.org/project/linux-mediatek/patch/20240402071113.3135903-1-wma...@chromium.org/
drivers/gpu/drm/mediatek/mtk_dp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c
b/drivers/gpu/drm/mediatek/mtk_dp.c
index 0ba72102636a..536366956447 100644
--- a/drivers/gpu/drm/mediatek/mtk_dp.c
+++ b/drivers/gpu/drm/mediatek/mtk_dp.c
@@ -2104,7 +2104,7 @@ static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux
*mtk_aux,
if (mtk_dp->bridge.type != DRM_MODE_CONNECTOR_eDP &&
!mtk_dp->train_info.cable_plugged_in) {
- ret = -EAGAIN;
+ ret = -EIO;
goto err;
}
--
2.44.0.683.g7961c838ac-goog
