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drm: bridge: Pass drm_display_info to drm_bridge_funcs .mode_valid()

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When validating a mode, bridges may need to do so in the context of a
display, as specified by drm_display_info. An example is the meson
dw-hdmi bridge that needs to consider the YUV 4:2:0 output format to
perform clock calculations.

Bridges that need the display info currently retrieve it from the
drm_connector created by the bridge. This gets in the way of moving
connector creation out of bridge drivers. To make this possible, pass
the drm_display_info to drm_bridge_funcs .mode_valid().

Changes to the bridge drivers have been performed with the following
coccinelle semantic patch and have been compile-tested.

@ rule1 @
identifier funcs;
identifier fn;
@@
 struct drm_bridge_funcs funcs = {
 	...,
 	.mode_valid = fn
 };

@ depends on rule1 @
identifier rule1.fn;
identifier bridge;
identifier mode;
@@
 enum drm_mode_status fn(
 	struct drm_bridge *bridge,
+	const struct drm_display_info *info,
 	const struct drm_display_mode *mode
 )
 {
 	...
 }

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Guido Günther <agx@sigxcpu.org> # for the nwl-dsi part:
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200526011505.31884-11-laurent.pinchart+renesas@ideasonboard.com
This commit is contained in:
Laurent Pinchart
2020-05-26 04:14:48 +03:00
committed by Sam Ravnborg
parent 192a3aa0e4
commit 12c683e12c
21 changed files with 28 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
include/drm/drm_bridge.h
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@@ -35,6 +35,7 @@
struct drm_bridge;
struct drm_bridge_timings;
struct drm_connector;
struct drm_display_info;
struct drm_panel;
struct edid;
struct i2c_adapter;
@@ -112,6 +113,7 @@ struct drm_bridge_funcs {
* drm_mode_status Enum
*/
enum drm_mode_status (*mode_valid)(struct drm_bridge *bridge,
const struct drm_display_info *info,
const struct drm_display_mode *mode);
/**
@@ -836,6 +838,7 @@ bool drm_bridge_chain_mode_fixup(struct drm_bridge *bridge,
struct drm_display_mode *adjusted_mode);
enum drm_mode_status
drm_bridge_chain_mode_valid(struct drm_bridge *bridge,
const struct drm_display_info *info,
const struct drm_display_mode *mode);
void drm_bridge_chain_disable(struct drm_bridge *bridge);
void drm_bridge_chain_post_disable(struct drm_bridge *bridge);