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linux/drivers/gpu/drm/mediatek
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Wojciech Macek a9ef192c48 drm/mediatek: dp: Fix mtk_dp_aux_transfer return value 
[ Upstream commit 8431fff9e0 ]

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: f70ac097a2 ("drm/mediatek: Add MT8195 Embedded DisplayPort driver")
Signed-off-by: Wojciech Macek <wmacek@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
Link: https://patchwork.kernel.org/project/dri-devel/patch/20240417103819.990512-1-wmacek@chromium.org/
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-06-12 11:03:46 +02:00
..
Kconfig drm/mediatek: dp: Add support for embedded DisplayPort aux-bus 2024-06-12 11:03:46 +02:00
Makefile drm/mediatek: Add MT8195 Embedded DisplayPort driver 2022-09-04 15:32:05 +03:00
mtk_cec.c drm/mediatek: Fix mtk_cec_mask() 2022-04-06 22:34:28 +08:00
mtk_cec.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
mtk_disp_aal.c drm/mediatek: Add lut diff flag for new gamma hardware support 2022-04-29 06:14:49 +08:00
mtk_disp_ccorr.c drm/mediatek: Add support for Mediatek SoC MT8192 2021-11-16 07:29:48 +08:00
mtk_disp_color.c drm/mediatek: Add component_del in OVL and COLOR remove function 2021-08-12 07:00:50 +08:00
mtk_disp_drv.h drm/mediatek: Add display merge start/stop API for cmdq support 2022-06-27 22:32:28 +08:00
mtk_disp_gamma.c drm/mediatek: Add lut diff flag for new gamma hardware support 2022-04-29 06:14:49 +08:00
mtk_disp_merge.c drm/mediatek: Fix underrun in VDO1 when switches off the layer 2024-01-25 15:27:35 -08:00
mtk_disp_ovl.c drm: Drop drm_blend.h from drm_crtc.h 2022-06-20 23:53:55 +03:00
mtk_disp_rdma.c Mediatek DRM Next for Linux 5.20 2022-07-12 17:01:42 +10:00
mtk_dp.c drm/mediatek: dp: Fix mtk_dp_aux_transfer return value 2024-06-12 11:03:46 +02:00
mtk_dp_reg.h drm/mediatek: dp: Remove unused register definitions 2022-09-19 12:17:42 +03:00
mtk_dpi.c drm/mediatek: Modify dpi power on/off sequence. 2022-12-31 13:32:11 +01:00
mtk_dpi_regs.h drm/mediatek: dpi: Add dp_intf support 2022-07-06 22:51:44 +08:00
mtk_drm_crtc.c drm/mediatek: Fix a null pointer crash in mtk_drm_crtc_finish_page_flip 2024-03-26 18:20:52 -04:00
mtk_drm_crtc.h drm-misc-next for 5.13: 2021-03-16 17:08:46 +10:00
mtk_drm_ddp_comp.c drm/mediatek: Fix wrong dither settings 2022-09-13 07:10:08 +08:00
mtk_drm_ddp_comp.h drm/mediatek: dpi: Add dp_intf support 2022-07-06 22:51:44 +08:00
mtk_drm_drv.c drm/mediatek: Clean dangling pointer on bind error path 2023-03-10 09:33:17 +01:00
mtk_drm_drv.h drm/mediatek: Add display MDP RDMA support for MT8195 2022-06-27 22:24:14 +08:00
mtk_drm_gem.c drm/mediatek: Add 0 size check to mtk_drm_gem_obj 2024-06-12 11:03:23 +02:00
mtk_drm_gem.h dma-buf-map: Rename to iosys-map 2022-02-07 16:35:35 -08:00
mtk_drm_plane.c drm/mediatek: Fix iommu fault by swapping FBs after updating plane state 2023-11-20 11:52:00 +01:00
mtk_drm_plane.h drm/mediatek: Add mediatek-drm plane color encoding info 2022-06-27 22:42:20 +08:00
mtk_dsi.c drm/mediatek: dsi: Fix DSI RGB666 formats and definitions 2024-03-26 18:20:50 -04:00
mtk_hdmi.c drm/mediatek: Fix return type of mtk_hdmi_bridge_mode_valid() 2022-12-31 13:33:01 +01:00
mtk_hdmi.h drm/mediatek: Separate mtk_hdmi_phy to an independent module 2020-09-06 07:02:54 +08:00
mtk_hdmi_ddc.c drm/mediatek: Add missing MODULE_DEVICE_TABLE() 2021-03-31 19:38:06 +08:00
mtk_hdmi_regs.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
mtk_mdp_rdma.c drm/mediatek: Return error if MDP RDMA failed to enable the clock 2024-01-25 15:27:35 -08:00
mtk_mdp_rdma.h drm/mediatek: Add display MDP RDMA support for MT8195 2022-06-27 22:24:14 +08:00