On 1/7/25 6:38 AM, Liu Ying wrote:
On 01/06/2025, Marek Vasut wrote:
The dw-hdmi output_port is set to 1 in order to look for a connector
next bridge in order to get DRM_BRIDGE_ATTACH_NO_CONNECTOR working.
The output_port set to 1 makes the DW HDMI driver core look up the
next bridge in DT, where the next bridge is often the hdmi-connector .
Similar to 0af5e0b41110 ("drm/meson: encoder_hdmi: switch to bridge
DRM_BRIDGE_ATTACH_NO_CONNECTOR")
Note that looking at the upstream arch/arm64/boot/dts/freescale/imx8mp*dts ,
the oldest commit which adds HDMI support is commit:
3e67a1ddd56d ("arm64: dts: imx8mp: Enable HDMI on TQMa8MPxL/MBa8MPxL")
That already contains the HDMI connector node. Most follow up additions
of HDMI support to another devices has been a variation of the same commit,
including connector node, which is the proper way of eanbling HDMI on the
i.MX8MP.
The rest should be covered by output_port_optional which should make systems
with DTs without HDMI connector node work, but such DTs should be updated and
the HDMI connector node should be added.
Signed-off-by: Marek Vasut <ma...@denx.de>
---
Cc: Andrzej Hajda <andrzej.ha...@intel.com>
Cc: David Airlie <airl...@gmail.com>
Cc: Fabio Estevam <feste...@gmail.com>
Cc: Jernej Skrabec <jernej.skra...@gmail.com>
Cc: Jonas Karlman <jo...@kwiboo.se>
Cc: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
Cc: Liu Ying <victor....@nxp.com>
Cc: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
Cc: Maxime Ripard <mrip...@kernel.org>
Cc: Neil Armstrong <neil.armstr...@linaro.org>
Cc: Pengutronix Kernel Team <ker...@pengutronix.de>
Cc: Robert Foss <rf...@kernel.org>
Cc: Sascha Hauer <s.ha...@pengutronix.de>
Cc: Shawn Guo <shawn...@kernel.org>
Cc: Simona Vetter <sim...@ffwll.ch>
Cc: Stefan Agner <ste...@agner.ch>
Cc: Thomas Zimmermann <tzimmerm...@suse.de>
Cc: dri-devel@lists.freedesktop.org
Cc: i...@lists.linux.dev
Cc: linux-arm-ker...@lists.infradead.org
---
V2: No change
V3: - Update commit message
- Move select DRM_DISPLAY_CONNECTOR to DRM_IMX8MP_DW_HDMI_BRIDGE
- Enable output_port_optional
V4: - Remove select DRM_DISPLAY_CONNECTOR
---
drivers/gpu/drm/bridge/imx/imx8mp-hdmi-tx.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/bridge/imx/imx8mp-hdmi-tx.c
b/drivers/gpu/drm/bridge/imx/imx8mp-hdmi-tx.c
index 1e7a789ec2890..3d63200e468bf 100644
--- a/drivers/gpu/drm/bridge/imx/imx8mp-hdmi-tx.c
+++ b/drivers/gpu/drm/bridge/imx/imx8mp-hdmi-tx.c
@@ -101,6 +101,8 @@ static int imx8mp_dw_hdmi_probe(struct platform_device
*pdev)
plat_data->phy_name = "SAMSUNG HDMI TX PHY";
plat_data->priv_data = hdmi;
plat_data->phy_force_vendor = true;
+ plat_data->output_port = 1;
How would you keep the behaviour of the connector after adding
DRM_BRIDGE_ATTACH_NO_CONNECTOR in display controller driver?
dw_hdmi_connector_create() implements CEC support at least. This was pointed
out in v2 and v3 comments.
https://lore.kernel.org/all/vvsj6ri2ke25nzocbq736yv7rphzma6pn3yk2uh7iu43zfe2sa@2fwye4k4w6he/
As far as I understand it, the CEC is being worked on separately already ?
