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authorPhilipp Zabel <p.zabel@pengutronix.de>2014-12-11 20:32:44 +0300
committerThierry Reding <treding@nvidia.com>2015-04-02 20:04:12 +0300
commit2938931f3732a4ec70c299e221ec8dea01dfd796 (patch)
tree4f08dd05bd203e91000989c1dea8804a35c735df /include/drm
parent725c9d40f3fe61256903adfab868f302e249fa2a (diff)
downloadlinux-2938931f3732a4ec70c299e221ec8dea01dfd796.tar.xz
drm/panel: Add display timing support
Many panel data sheets, additionally to typical values, list allowed ranges for timings such as hsync/vsync lengths, porches, and the pixel clock rate. These can be stored in a struct display_timing, to be used by an encoder mode_fixup callback to clamp user provided timing values or to validate workarounds for clock source limitations. This patch adds a new drm_panel_funcs callback that returns the panel's available display_timing entries. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'include/drm')
-rw-r--r--include/drm/drm_panel.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/drm/drm_panel.h b/include/drm/drm_panel.h
index 1fbcc96063a7..13ff44b28893 100644
--- a/include/drm/drm_panel.h
+++ b/include/drm/drm_panel.h
@@ -29,6 +29,7 @@
struct drm_connector;
struct drm_device;
struct drm_panel;
+struct display_timing;
/**
* struct drm_panel_funcs - perform operations on a given panel
@@ -38,6 +39,8 @@ struct drm_panel;
* @enable: enable panel (turn on back light, etc.)
* @get_modes: add modes to the connector that the panel is attached to and
* return the number of modes added
+ * @get_timings: copy display timings into the provided array and return
+ * the number of display timings available
*
* The .prepare() function is typically called before the display controller
* starts to transmit video data. Panel drivers can use this to turn the panel
@@ -68,6 +71,8 @@ struct drm_panel_funcs {
int (*prepare)(struct drm_panel *panel);
int (*enable)(struct drm_panel *panel);
int (*get_modes)(struct drm_panel *panel);
+ int (*get_timings)(struct drm_panel *panel, unsigned int num_timings,
+ struct display_timing *timings);
};
struct drm_panel {