drm/mediatek: dp: Change the aux retries times when receiving AUX_DEFER
authorXinlei Lee <xinlei.lee@mediatek.com>
Wed, 29 Mar 2023 06:43:23 +0000 (14:43 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 11 May 2023 14:03:12 +0000 (23:03 +0900)
commit41a51318ab37d17946009d8cd9931553651e3347
tree7e3c76ea4d919cf9efa6186406b2647c23b84187
parente80c69eb795f8443df055a9bde196e08843cb54d
drm/mediatek: dp: Change the aux retries times when receiving AUX_DEFER

[ Upstream commit 9243d70e05c5989f84f840612965f96b524da925 ]

DP 1.4a Section 2.8.7.1.5.6.1:
A DP Source device shall retry at least seven times upon receiving
AUX_DEFER before giving up the AUX transaction.

The drm_dp_i2c_do_msg() function in the drm_dp_helper.c file will
judge the status of the msg->reply parameter passed to aux_transfer
for different processing.

Fixes: f70ac097a2cf ("drm/mediatek: Add MT8195 Embedded DisplayPort driver")
Signed-off-by: Xinlei Lee <xinlei.lee@mediatek.com>
Link: https://patchwork.kernel.org/project/linux-mediatek/patch/1680072203-10394-1-git-send-email-xinlei.lee@mediatek.com/
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
drivers/gpu/drm/mediatek/mtk_dp.c