Hi, Markus:
Markus Schneider-Pargmann msp@baylibre.com 於 2021年10月1日 週五 下午5:44寫道：
This patch adds a DisplayPort driver for the Mediatek mt8195 SoC and a according phy driver mediatek-dp-phy.
It supports both functional units on the mt8195, the embedded DisplayPort as well as the external DisplayPort units. It offers hot-plug-detection, audio up to 8 channels, and DisplayPort 1.4 with up to 4 lanes.
The driver creates a child device for the phy. The child device will never exist without the parent being active. As they are sharing a register range, the parent passes a regmap pointer to the child so that both can work with the same register range. The phy driver sets device data that is read by the parent to get the phy device that can be used to control the phy properties.
This driver is based on an initial version by Jason-JH.Lin jason-jh.lin@mediatek.com.
Signed-off-by: Markus Schneider-Pargmann msp@baylibre.com
Notes: Changes v2 -> v3: - Solve TODOs and add defines for undescribed registers - Remove TODOs that were irrelevant
Changes v1 -> v2: - Fix checkpatch --strict suggestions - General cleanups of the code. - Remove all remaining non-atomic functions. - Remove unused includes and sort them. - Remove unused select GENERIC_PHY - Rename phy registers DP_PHY -> MTK_DP_PHY - Replace usage of delays with usleep_range. - Split the phy register accesses into a separate phy driver. - Use a lock to guard access to mtk_dp->edid as it can be allocated/used/freed in different threads - use struct dp_sdp for sdp packets. Changes RFC -> v1: - Removed unused register definitions. - Replaced workqueue with threaded irq. - Removed connector code. - Move to atomic_* drm functions. - General cleanups of the code. - Remove unused select GENERIC_PHY.drivers/gpu/drm/mediatek/Kconfig | 7 + drivers/gpu/drm/mediatek/Makefile | 2 + drivers/gpu/drm/mediatek/mtk_dp.c | 2825 ++++++++++++++++++++++++ drivers/gpu/drm/mediatek/mtk_dp_reg.h | 535 +++++ drivers/gpu/drm/mediatek/mtk_drm_drv.c | 1 + drivers/gpu/drm/mediatek/mtk_drm_drv.h | 1 + drivers/phy/mediatek/Kconfig | 8 + drivers/phy/mediatek/Makefile | 1 + drivers/phy/mediatek/phy-mtk-dp.c | 218 ++
Separate the phy driver to another patch because phy driver would go into different maintainer's tree.
Regards, Chun-Kuang.
include/linux/soc/mediatek/mtk-mmsys.h | 2 + 10 files changed, 3600 insertions(+) create mode 100644 drivers/gpu/drm/mediatek/mtk_dp.c create mode 100644 drivers/gpu/drm/mediatek/mtk_dp_reg.h create mode 100644 drivers/phy/mediatek/phy-mtk-dp.c