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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org From: Chaoyi Chen This series is split from the v15 "Add Type-C DP support for RK3399 EVB IND board" series [1]. It focuses on the DRM bridge and Rockchip platform CDN-DP controller changes. [1] https://lore.kernel.org/all/20260304094152.92-1-kernel@airkyi.com/ ==== 1. Generic Type-C DP HPD bridge Currently, several USB-C controller drivers register their own DP HPD bridge via aux-hpd-bridge.c, each duplicating the same logic. For devicetree based platforms, the USB-C controller may vary across boards, and not every USB-C controller driver implements this feature. Patch 1 implements a generic DP HPD bridge that monitors Type-C bus events and automatically creates an HPD bridge when a Type-C port device with DP SVID is registered. 2. Multiple bridge model for CDN-DP The RK3399 has two USB/DP combo PHY and one CDN-DP controller. Patch 5 introduces a multi-bridge model where each PHY port gets a separate encoder and bridge, allowing flexible selection of the output PHY port. This is based on the DRM AUX HPD bridge rather than extcon. ==== Patch 1 adds new API to check whether a DisplayPort HPD bridge has already been registered(Sebastian). Patch 2 adds generic USB Type-C DP HPD bridge (Dmitry, Heikki). Patch 3 adds module soft depend for USB Type-C DP HPD bridge(Sebastian). Patch 4 adds new API drm_aux_bridge_register_from_node() (Neil). Patch 5 adds DRM AUX bridge support for RK3399 USBDP PHY (Neil). Patch 6 drops CDN-DP's extcon dependency when Type-C is present (Dmitry). Patch 7 adds multiple bridges to support PHY port selection (Dmitry, Luca). Changes in v7: - Link to v6: https://lore.kernel.org/all/20260804070730.68-1-kernel@airkyi.com/ - Fix extcon HPD detection by checking lanes in cdn_dp_connected_port() (sashiko). - Bound endpoint count by PHY ports to avoid overflow and uninitialized reads (sashiko). - Use drm_bridge_clear_and_put() to clear next_bridge_list pointers (sashiko). - Clear EDID cache pointers after free in unbind() (sashiko). Changes in v6: - Link to v5: https://lore.kernel.org/all/20260730013349.51-1-kernel@airkyi.com/ - Avoid duplicate registration of the same DisplayPort HPD bridge. Changes in v5: - Link to v4: https://lore.kernel.org/all/20260727064408.101-1-kernel@airkyi.com/ - Add module soft depend for USB Type-C DP HPD bridge. Changes in v4: - Link to v3: https://lore.kernel.org/all/20260717072323.96-1-kernel@airkyi.com/ - Scan the entire typec_bus and attempt to register the hpd bridge, so as not to miss devices that were already added during initialization. Changes in v3: - Link to v2: https://lore.kernel.org/all/20260608070805.88-1-kernel@airkyi.com/ (Sorry, I forgot to add the "v2" title, so it looks like v1.) - Remove now-redundant call to drm_connector_attach_encoder() - Rebase to v7.2-rc2 Changes in v2: - Link to v1: https://lore.kernel.org/all/20260521032854.103-1-kernel@airkyi.com/ - Add copyright text. - Remove useless goto. - Fix incorrect function names in the documentation comments. - Fix the check logic for dp->active_port (0 is valid). - Fix the uninitialized prev_port. - Remove duplicate logic from cdn_dp_switch_port(). - Fix the prototype of cdn_dp_bridge_hpd_notify(). - Properly release connector->fwnode. - Properly release next_bridge. Chaoyi Chen (7): drm/bridge: aux-hpd-bridge: Add drm_dev_has_dp_hpd_bridge() drm/bridge: Implement generic USB Type-C DP HPD bridge drm/display: Add soft depend for aux-hpd-typec-dp-bridge module drm/bridge: aux: Add drm_aux_bridge_register_from_node() phy: rockchip: phy-rockchip-typec: Add DRM AUX bridge drm/rockchip: cdn-dp: Support handle lane info without extcon drm/rockchip: cdn-dp: Add multiple bridges to support PHY port selection drivers/gpu/drm/bridge/Kconfig | 10 + drivers/gpu/drm/bridge/Makefile | 1 + drivers/gpu/drm/bridge/aux-bridge.c | 26 +- drivers/gpu/drm/bridge/aux-hpd-bridge.c | 42 +- .../gpu/drm/bridge/aux-hpd-typec-dp-bridge.c | 67 ++++ .../gpu/drm/display/drm_display_helper_mod.c | 1 + drivers/gpu/drm/rockchip/Kconfig | 1 + drivers/gpu/drm/rockchip/cdn-dp-core.c | 365 +++++++++++++++--- drivers/gpu/drm/rockchip/cdn-dp-core.h | 18 +- drivers/phy/rockchip/Kconfig | 2 + drivers/phy/rockchip/phy-rockchip-typec.c | 13 +- include/drm/bridge/aux-bridge.h | 12 + 12 files changed, 486 insertions(+), 72 deletions(-) create mode 100644 drivers/gpu/drm/bridge/aux-hpd-typec-dp-bridge.c -- 2.53.0 _______________________________________________ Linux-rockchip mailing list Linux-rockchip@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-rockchip