kernel/linux.git/drivers/gpu/drm/mediatek/mtk_dp.c, branch v6.2

drm/mediatek: dp: change mtk_dp_driver to static

2022-09-19T09:33:54+00:00

mtk_dp_driver is only used in mtk_dp.c now, change it to static. Fixes: f70ac097a2cf ("drm/mediatek: Add MT8195 Embedded DisplayPort driver") Signed-off-by: Yang Yingliang Reviewed-by: Dmitry Osipenko Acked-by: Chun-Kuang Hu Signed-off-by: Dmitry Osipenko Link: https://patchwork.freedesktop.org/patch/msgid/20220913134929.1970187-1-yangyingliang@huawei.com

drm/mediatek: dp: Fix compiler warning in mtk_dp_video_mute()

2022-09-19T09:30:28+00:00

Fix debug message formatting by using %s instead of 0x%x. Fixes: f70ac097a2cf ("drm/mediatek: Add MT8195 Embedded DisplayPort driver") Reported-by: Chun-Kuang Hu Signed-off-by: Bo-Chen Chen Reviewed-by: Matthias Brugger Acked-by: Chun-Kuang Hu Reviewed-by: AngeloGioacchino Del Regno Signed-off-by: Dmitry Osipenko Link: https://patchwork.freedesktop.org/patch/msgid/20220916133821.27980-4-rex-bc.chen@mediatek.com

drm/mediatek: dp: Reduce indentation in mtk_dp_bdg_detect()

2022-09-19T09:17:41+00:00

In order to improve human readability, reduce the indentation by returning early if the dp/edp cable is not plugged in. Signed-off-by: Bo-Chen Chen Acked-by: Chun-Kuang Hu Reviewed-by: AngeloGioacchino Del Regno Signed-off-by: Dmitry Osipenko Link: https://patchwork.freedesktop.org/patch/msgid/20220916133821.27980-2-rex-bc.chen@mediatek.com

drm/mediatek: dp: Audio support for MT8195

2022-09-04T12:32:42+00:00

This patch adds audio support to the DP driver for MT8195 with up to 8 channels. Signed-off-by: Guillaume Ranquet Signed-off-by: Bo-Chen Chen Tested-by: AngeloGioacchino Del Regno Reviewed-by: AngeloGioacchino Del Regno Signed-off-by: Dmitry Osipenko Link: https://patchwork.freedesktop.org/patch/msgid/20220901044149.16782-11-rex-bc.chen@mediatek.com

drm/mediatek: dp: Add hpd debounce

2022-09-04T12:32:35+00:00

From the DP spec 1.4a chapter 3.3, upstream devices should implement HPD signal de-bouncing on an external connection. A period of 100ms should be used to detect an HPD connect event. To cover these cases, HPD de-bounce should be implemented only after HPD low has been detected for at least 100ms. Therefore, 1. If HPD is low (which means plugging out) for longer than 100ms: we need to do de-bouncing (which means we need to wait for 100ms). 2. If HPD low is for less than 100ms: we don't need to care about the de-bouncing. In this patch, we start a 100ms timer and use a need_debounce boolean to implement the feature. Two cases when HPD is high: 1. If the timer is expired (>100ms): - need_debounce is true. - When HPD high (plugging event comes), need_debounce will be true and then we need to do de-bouncing (wait for 100ms). 2. If the timer is not expired (<100ms): - need_debounce is false. - When HPD high (plugging event comes), need_debounce will be false and no need to do de-bouncing. HPD_______ __________________ | |<- 100ms -> |____________| <- 100ms -> Without HPD de-bouncing, USB-C to HDMI Adapaters will not be detected. The change has been successfully tested with the following devices: - Dell Adapter - USB-C to HDMI - Acer 1in1 HDMI dongle - Ugreen 1in1 HDMI dongle - innowatt HDMI + USB3 hub - Acer 2in1 HDMI dongle - Apple 3in1 HDMI dongle (A2119) - J5Create 3in1 HDMI dongle (JAC379) Tested-by: Rex-BC Chen Reviewed-by: Rex-BC Chen Signed-off-by: Jitao Shi Signed-off-by: Guillaume Ranquet Signed-off-by: Bo-Chen Chen Reviewed-by: AngeloGioacchino Del Regno Reviewed-by: CK Hu Signed-off-by: Dmitry Osipenko Link: https://patchwork.freedesktop.org/patch/msgid/20220901044149.16782-10-rex-bc.chen@mediatek.com

drm/mediatek: dp: Add MT8195 External DisplayPort support

2022-09-04T12:32:32+00:00

Add External DisplayPort support to the MT8195 eDP driver. Signed-off-by: Guillaume Ranquet Signed-off-by: Bo-Chen Chen Reviewed-by: CK Hu Tested-by: AngeloGioacchino Del Regno Reviewed-by: AngeloGioacchino Del Regno Signed-off-by: Dmitry Osipenko Link: https://patchwork.freedesktop.org/patch/msgid/20220901044149.16782-9-rex-bc.chen@mediatek.com

drm/mediatek: dp: Determine device of next_bridge

2022-09-04T12:32:30+00:00

It's not necessary to have a next_bridge for DP device, so we add this patch to judge this. Signed-off-by: Bo-Chen Chen Reviewed-by: CK Hu Tested-by: AngeloGioacchino Del Regno Reviewed-by: AngeloGioacchino Del Regno Signed-off-by: Dmitry Osipenko Link: https://patchwork.freedesktop.org/patch/msgid/20220901044149.16782-8-rex-bc.chen@mediatek.com

drm/mediatek: dp: Add multiple calibration data formats support

2022-09-04T12:32:17+00:00

The calibration data formats of eDP and DP are different. We add "const struct mtk_dp_efuse_fmt *efuse_fmt" to the device data to define them. Signed-off-by: Bo-Chen Chen Reviewed-by: CK Hu Tested-by: AngeloGioacchino Del Regno Reviewed-by: AngeloGioacchino Del Regno Signed-off-by: Dmitry Osipenko Link: https://patchwork.freedesktop.org/patch/msgid/20220901044149.16782-7-rex-bc.chen@mediatek.com

drm/mediatek: dp: Add multiple smc commands support

2022-09-04T12:32:14+00:00

The smc commands of eDP and DP are different. We add smc_cmd to the device data to define them. Signed-off-by: Bo-Chen Chen Reviewed-by: CK Hu Tested-by: AngeloGioacchino Del Regno Reviewed-by: AngeloGioacchino Del Regno Signed-off-by: Dmitry Osipenko Link: https://patchwork.freedesktop.org/patch/msgid/20220901044149.16782-6-rex-bc.chen@mediatek.com

drm/mediatek: dp: Add multiple bridge types support

2022-09-04T12:32:11+00:00

The bridge types of eDP and DP are different. We add device data to this driver and add bridge_type to the device data to define them. Signed-off-by: Bo-Chen Chen Reviewed-by: CK Hu Tested-by: AngeloGioacchino Del Regno Reviewed-by: AngeloGioacchino Del Regno Signed-off-by: Dmitry Osipenko Link: https://patchwork.freedesktop.org/patch/msgid/20220901044149.16782-5-rex-bc.chen@mediatek.com