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drm/msm/dp: Add eDP support via aux_bus

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This patch adds support for generic eDP sink through aux_bus. The eDP/DP
controller driver should support aux transactions originating from the
panel-edp driver and hence should be initialized and ready.

The panel bridge supporting the panel should be ready before the bridge
connector is initialized. The generic panel probe needs the controller
resources to be enabled to support the aux transactions originating from
the panel probe.

Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Patchwork: https://patchwork.freedesktop.org/patch/483307/
Link: https://lore.kernel.org/r/1650887072-16652-2-git-send-email-quic_sbillaka@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
This commit is contained in:
Sankeerth Billakanti
2022-04-25 17:14:29 +05:30
committed by Dmitry Baryshkov
parent 375a126090
commit c3bf8e21b3
5 changed files with 101 additions and 29 deletions
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14
drivers/gpu/drm/msm/dp/dp_parser.h
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@@ -125,7 +125,7 @@ struct dp_parser {
u32 max_dp_lanes;
struct drm_bridge *next_bridge;
int (*parse)(struct dp_parser *parser, int connector_type);
int (*parse)(struct dp_parser *parser);
};
/**
@@ -141,4 +141,16 @@ struct dp_parser {
*/
struct dp_parser *dp_parser_get(struct platform_device *pdev);
/**
* dp_parser_find_next_bridge() - find an additional bridge to DP
*
* @parser: dp_parser data from client
*
* This function is used to find any additional bridge attached to
* the DP controller. The eDP interface requires a panel bridge.
*
* Return: 0 if able to get the bridge, otherwise negative errno for failure.
*/
int dp_parser_find_next_bridge(struct dp_parser *parser);
#endif