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drm/omap: Add infrastructure to support drm_bridge local to DSS outputs

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In order to support drm_bridge-based pipeline, the internal HDMI
encoders will need to expose the EDID read operation through the
drm_bridge API, and thus to expose a drm_bridge instance corresponding
to the encoder. The HDMI encoders are however handled as omap_dss_device
instances, which conflicts with this requirement.

In order to move forward with the drm_bridge transition, add support for
creating drm_bridge instances local to DSS outputs. If a local bridge is
passed to the omapdss_device_init_output() function, it is used as the
first bridge in the chain, and the omap_dss_device.next_bridge field is
set to the next bridge for the use of the internal encoders' bridges.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Tested-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200226112514.12455-27-laurent.pinchart@ideasonboard.com
This commit is contained in:
Laurent Pinchart
2020-02-26 13:24:46 +02:00
committed by Tomi Valkeinen
parent c83fefd738
commit 326a1166ca
9 changed files with 26 additions and 12 deletions
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2
drivers/gpu/drm/omapdrm/dss/dsi.c
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@@ -5121,7 +5121,7 @@ static int dsi_init_output(struct dsi_data *dsi)
| DRM_BUS_FLAG_DE_HIGH
| DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE;
r = omapdss_device_init_output(out);
r = omapdss_device_init_output(out, NULL);
if (r < 0)
return r;