| Message ID | 20220727045035.32225-8-rex-bc.chen@mediatek.com |
|---|---|
| State | New |
| Headers | show |
| Series | drm/mediatek: Add MT8195 DisplayPort driver | expand |
On Wed, 2022-07-27 at 11:40 +0200, AngeloGioacchino Del Regno wrote: > Il 27/07/22 06:50, Bo-Chen Chen ha scritto: > > For some DP dungles, we need to train more than onece to confirm > > that we > > don't misjudge the status of sink device. > > Please fix the typos in your commit title and description. > title: misjudgment -> misjudgement > desc: dungles->dongles; onece->once > > > > > Signed-off-by: Bo-Chen Chen <rex-bc.chen@mediatek.com> > > --- > > drivers/gpu/drm/mediatek/mtk_dp.c | 21 ++++++++++++++++++--- > > 1 file changed, 18 insertions(+), 3 deletions(-) > > > > diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c > > b/drivers/gpu/drm/mediatek/mtk_dp.c > > index ce817cb59445..80d7d6488105 100644 > > --- a/drivers/gpu/drm/mediatek/mtk_dp.c > > +++ b/drivers/gpu/drm/mediatek/mtk_dp.c > > @@ -42,6 +42,7 @@ > > #define MTK_DP_CHECK_SINK_CAP_TIMEOUT_COUNT 3 > > #define MTK_DP_TBC_BUF_READ_START_ADDR 0x08 > > #define MTK_DP_TRAIN_DOWNSCALE_RETRY 8 > > +#define MTK_DP_TRAIN_CLEAR_RETRY 50 > > > > struct mtk_dp_train_info { > > bool tps3; > > @@ -1431,11 +1432,25 @@ static int mtk_dp_video_config(struct > > mtk_dp *mtk_dp) > > > > static int mtk_dp_training(struct mtk_dp *mtk_dp) > > { > > + short max_retry = MTK_DP_TRAIN_CLEAR_RETRY; > > int ret; > > > > - ret = mtk_dp_train_start(mtk_dp); > > - if (ret) > > - return ret; > > + /* > > + * We do retry to confirm that we don't misjudge the sink > > status. > > + * If it is still failed, we can confirm there are some issues > > for the > > + * sink device. > > + */ > > + do { > > + ret = mtk_dp_train_start(mtk_dp); > > + if (!ret) > > + break; > > + } while (--max_retry); > > + > > + dev_info(mtk_dp->dev, "dp training clear retry times: %d\n", > > + MTK_DP_TRAIN_CLEAR_RETRY - max_retry); > > dev_dbg() here. > > ...after which, > > Reviewed-by: AngeloGioacchino Del Regno < > angelogioacchino.delregno@collabora.com> > Hello Angelo, Thanks for your review. I will modify these in next version. BRs, Bo-Chen > > + > > + if (!max_retry) > > + return -ETIMEDOUT; > > > > ret = mtk_dp_video_config(mtk_dp); > > if (ret) > >
Hello all, I will drop this modification becaus after we testing current drivers, the issue described in commit message does not occur. BRs, Bo-Chen On Thu, 2022-07-28 at 17:40 +0800, Rex-BC Chen wrote: > On Wed, 2022-07-27 at 11:40 +0200, AngeloGioacchino Del Regno wrote: > > Il 27/07/22 06:50, Bo-Chen Chen ha scritto: > > > For some DP dungles, we need to train more than onece to confirm > > > that we > > > don't misjudge the status of sink device. > > > > Please fix the typos in your commit title and description. > > title: misjudgment -> misjudgement > > desc: dungles->dongles; onece->once > > > > > > > > Signed-off-by: Bo-Chen Chen <rex-bc.chen@mediatek.com> > > > --- > > > drivers/gpu/drm/mediatek/mtk_dp.c | 21 ++++++++++++++++++--- > > > 1 file changed, 18 insertions(+), 3 deletions(-) > > > > > > diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c > > > b/drivers/gpu/drm/mediatek/mtk_dp.c > > > index ce817cb59445..80d7d6488105 100644 > > > --- a/drivers/gpu/drm/mediatek/mtk_dp.c > > > +++ b/drivers/gpu/drm/mediatek/mtk_dp.c > > > @@ -42,6 +42,7 @@ > > > #define MTK_DP_CHECK_SINK_CAP_TIMEOUT_COUNT 3 > > > #define MTK_DP_TBC_BUF_READ_START_ADDR 0x08 > > > #define MTK_DP_TRAIN_DOWNSCALE_RETRY 8 > > > +#define MTK_DP_TRAIN_CLEAR_RETRY 50 > > > > > > struct mtk_dp_train_info { > > > bool tps3; > > > @@ -1431,11 +1432,25 @@ static int mtk_dp_video_config(struct > > > mtk_dp *mtk_dp) > > > > > > static int mtk_dp_training(struct mtk_dp *mtk_dp) > > > { > > > + short max_retry = MTK_DP_TRAIN_CLEAR_RETRY; > > > int ret; > > > > > > - ret = mtk_dp_train_start(mtk_dp); > > > - if (ret) > > > - return ret; > > > + /* > > > + * We do retry to confirm that we don't misjudge the sink > > > status. > > > + * If it is still failed, we can confirm there are some issues > > > for the > > > + * sink device. > > > + */ > > > + do { > > > + ret = mtk_dp_train_start(mtk_dp); > > > + if (!ret) > > > + break; > > > + } while (--max_retry); > > > + > > > + dev_info(mtk_dp->dev, "dp training clear retry times: %d\n", > > > + MTK_DP_TRAIN_CLEAR_RETRY - max_retry); > > > > dev_dbg() here. > > > > ...after which, > > > > Reviewed-by: AngeloGioacchino Del Regno < > > angelogioacchino.delregno@collabora.com> > > > > Hello Angelo, > > Thanks for your review. > I will modify these in next version. > > BRs, > Bo-Chen > > > > + > > > + if (!max_retry) > > > + return -ETIMEDOUT; > > > > > > ret = mtk_dp_video_config(mtk_dp); > > > if (ret) > > > > > >
diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c index ce817cb59445..80d7d6488105 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -42,6 +42,7 @@ #define MTK_DP_CHECK_SINK_CAP_TIMEOUT_COUNT 3 #define MTK_DP_TBC_BUF_READ_START_ADDR 0x08 #define MTK_DP_TRAIN_DOWNSCALE_RETRY 8 +#define MTK_DP_TRAIN_CLEAR_RETRY 50 struct mtk_dp_train_info { bool tps3; @@ -1431,11 +1432,25 @@ static int mtk_dp_video_config(struct mtk_dp *mtk_dp) static int mtk_dp_training(struct mtk_dp *mtk_dp) { + short max_retry = MTK_DP_TRAIN_CLEAR_RETRY; int ret; - ret = mtk_dp_train_start(mtk_dp); - if (ret) - return ret; + /* + * We do retry to confirm that we don't misjudge the sink status. + * If it is still failed, we can confirm there are some issues for the + * sink device. + */ + do { + ret = mtk_dp_train_start(mtk_dp); + if (!ret) + break; + } while (--max_retry); + + dev_info(mtk_dp->dev, "dp training clear retry times: %d\n", + MTK_DP_TRAIN_CLEAR_RETRY - max_retry); + + if (!max_retry) + return -ETIMEDOUT; ret = mtk_dp_video_config(mtk_dp); if (ret)
For some DP dungles, we need to train more than onece to confirm that we don't misjudge the status of sink device. Signed-off-by: Bo-Chen Chen <rex-bc.chen@mediatek.com> --- drivers/gpu/drm/mediatek/mtk_dp.c | 21 ++++++++++++++++++--- 1 file changed, 18 insertions(+), 3 deletions(-)