Hello, This patch series converts the R-Car DU driver to use the DRM bridge connector helper drm_bridge_connector_init(). The bulk of the series is conversion of the adv7511, simple-bridge, rcar-lbds and dw-hdmi drivers to make connector creation optional (through the DRM_BRIDGE_ATTACH_NO_CONNECTOR flag). The series starts with the adv7511 driver, previously posted as "[PATCH 0/4] drm: bridge: adv7511: Enable usage with DRM bridge connector helper" ([1]). Patches 01/27 to 04/27 incorporate all the received review comments. The next three patches address the simple-bridge driver, previously posted as "[PATCH 0/2] drm: bridge: simple-bridge: Enable usage with DRM bridge connector helper". Patch 05/27 is an additional fix that stems from the review, and patches 06/27 and 07/27 incorporate all the received review comments. Patch 08/27 is a new patch that addresses the rcar-lvds driver. Instead of implementing direct support for DRM_BRIDGE_ATTACH_NO_CONNECTOR, it simply removes code that shouldn't have been in the driver in the first place by switching to the panel bridge helper. Patches 09/27 to 22/27 then address the dw-hdmi driver. That's a more sizeable rework, due to the fact that the driver implements a mid-layer for platform-specific glue, with the internal drm_connector being used throughout the whole code. There's no rocket science there, but patch 10/27 should be noted for adding a new argument to the drm_bridge_funcs.mode_valid() function. Please see individual patches for details. Patch 23/27 adds support to the dw-hdmi driver to attach to a downstream bridge if one is specified in DT. As the DT port number corresponding to the video output differs between platforms that integrate the dw-hdmi (some of them even don't have a video output port, which should probably be fixed, but that's out of scope for this series), the port number has to be specified by the platform glue layer. Patch 24/27 does so for the R-Car dw-hdmi driver. Patch 25/27 is a drive-by fix for an error path issue in the rcar-du driver. Patch 26/27 finally makes use of the drm_bridge_connector_init() helper. Unfortunately, this breaks the VGA output on R-Car Gen3 platforms. On those platforms, the VGA DDC lines are not connected, and there is no mean for software to detect the VGA output connection status. When the simple-bridge driver creates a connector, it automatically adds default modes when no DDC is available. This behavious is also present int the DRM probe helper drm_helper_probe_single_connector_modes(), but only when the connector status is connector_status_connected. As the driver (rightfully) reports connector_status_unconnected, no modes are added. Patch 27/27 fixes this issue by extending addition of default modes in drm_helper_probe_single_connector_modes() when the output status is unknown. An alternative approach would be to implement this behaviour in the bridge connector helper (drm_bridge_connector.c). All the modified drivers have been compile-tested, and the series has been tested on a Renesas R-Car Salvator-XS board with the VGA, HDMI and LVDS outputs. [1] https://lore.kernel.org/dri-devel/20200409004610.12346-1-laurent.pinchart+renesas@xxxxxxxxxxxxxxxx/ [2] https://lore.kernel.org/dri-devel/20200409003636.11792-1-laurent.pinchart+renesas@xxxxxxxxxxxxxxxx/ Laurent Pinchart (27): drm: bridge: adv7511: Split EDID read to a separate function drm: bridge: adv7511: Split connector creation to a separate function drm: bridge: adv7511: Implement bridge connector operations drm: bridge: adv7511: Make connector creation optional drm: bridge: Return NULL on error from drm_bridge_get_edid() drm: bridge: simple-bridge: Delegate operations to next bridge drm: bridge: simple-bridge: Make connector creation optional drm: rcar-du: lvds: Convert to DRM panel bridge helper drm: edid: Constify connector argument to infoframe functions drm: bridge: Pass drm_display_info to drm_bridge_funcs .mode_valid() drm: bridge: dw-hdmi: Pass private data pointer to .mode_valid() drm: bridge: dw-hdmi: Pass private data pointer to .configure_phy() drm: bridge: dw-hdmi: Remove unused field from dw_hdmi_plat_data drm: meson: dw-hdmi: Use dw_hdmi context to replace hack drm: bridge: dw-hdmi: Pass drm_display_info to .mode_valid() drm: bridge: dw-hdmi: Constify mode argument to dw_hdmi_phy_ops .init() drm: bridge: dw-hdmi: Constify mode argument to internal functions drm: bridge: dw-hdmi: Pass drm_display_info to dw_hdmi_support_scdc() drm: bridge: dw-hdmi: Split connector creation to a separate function drm: bridge: dw-hdmi: Store current connector in struct dw_hdmi drm: bridge: dw-hdmi: Pass drm_connector to internal functions as needed drm: bridge: dw-hdmi: Make connector creation optional drm: bridge: dw-hdmi: Attach to next bridge if available drm: rcar-du: dw-hdmi: Set output port number drm: rcar-du: Fix error handling in rcar_du_encoder_init() drm: rcar-du: Use drm_bridge_connector_init() helper drm: Add default modes for connectors in unknown state drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 159 +++++--- .../drm/bridge/analogix/analogix-anx6345.c | 1 + .../drm/bridge/analogix/analogix-anx78xx.c | 1 + drivers/gpu/drm/bridge/cdns-dsi.c | 1 + drivers/gpu/drm/bridge/chrontel-ch7033.c | 1 + drivers/gpu/drm/bridge/nwl-dsi.c | 1 + drivers/gpu/drm/bridge/sii9234.c | 1 + drivers/gpu/drm/bridge/sil-sii8620.c | 1 + drivers/gpu/drm/bridge/simple-bridge.c | 113 +++--- drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 357 ++++++++++++------ drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 1 + drivers/gpu/drm/bridge/tc358767.c | 1 + drivers/gpu/drm/bridge/tc358768.c | 1 + drivers/gpu/drm/bridge/thc63lvd1024.c | 1 + drivers/gpu/drm/bridge/ti-tfp410.c | 11 +- drivers/gpu/drm/drm_atomic_helper.c | 3 +- drivers/gpu/drm/drm_bridge.c | 10 +- drivers/gpu/drm/drm_edid.c | 12 +- drivers/gpu/drm/drm_probe_helper.c | 7 +- drivers/gpu/drm/i2c/tda998x_drv.c | 1 + drivers/gpu/drm/imx/dw_hdmi-imx.c | 6 +- drivers/gpu/drm/meson/meson_dw_hdmi.c | 34 +- drivers/gpu/drm/omapdrm/dss/dpi.c | 1 + drivers/gpu/drm/omapdrm/dss/sdi.c | 1 + drivers/gpu/drm/omapdrm/dss/venc.c | 1 + drivers/gpu/drm/rcar-du/rcar_du_encoder.c | 26 +- drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c | 7 +- drivers/gpu/drm/rcar-du/rcar_lvds.c | 124 +----- drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 6 +- drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c | 6 +- drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h | 3 +- drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c | 3 +- include/drm/bridge/dw_hdmi.h | 28 +- include/drm/drm_bridge.h | 3 + include/drm/drm_edid.h | 6 +- include/drm/drm_modeset_helper_vtables.h | 8 +- 36 files changed, 541 insertions(+), 406 deletions(-) -- Regards, Laurent Pinchart
