Most of the panels need an init sequence as mentioned below: -- poweron LCD unit/LCD_EN -- start video data -- poweron LED unit/BL_EN With existing callbacks for drm panel, we cannot accomodate such panels, since only one callback, i.e "panel_enable" is supported.
This patch adds a "pre_enable" callback which can be called before the actual video data is on, and then call the "enable" callback after the video data is available.
Signed-off-by: Ajay Kumar ajaykumar.rs@samsung.com --- include/drm/drm_panel.h | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/include/drm/drm_panel.h b/include/drm/drm_panel.h index c2ab77a..89210bf 100644 --- a/include/drm/drm_panel.h +++ b/include/drm/drm_panel.h @@ -32,6 +32,7 @@ struct drm_panel;
struct drm_panel_funcs { int (*disable)(struct drm_panel *panel); + int (*pre_enable)(struct drm_panel *panel); int (*enable)(struct drm_panel *panel); int (*get_modes)(struct drm_panel *panel); }; @@ -54,6 +55,14 @@ static inline int drm_panel_disable(struct drm_panel *panel) return panel ? -ENOSYS : -EINVAL; }
+static inline int drm_panel_pre_enable(struct drm_panel *panel) +{ + if (panel && panel->funcs && panel->funcs->pre_enable) + return panel->funcs->pre_enable(panel); + + return panel ? -ENOSYS : -EINVAL; +} + static inline int drm_panel_enable(struct drm_panel *panel) { if (panel && panel->funcs && panel->funcs->enable)