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drm: add a helper function to extract 'de-active' and 'pixelclk-active' from DT 

add a helper function to extract information about pixel clock and DE
polarity from DT for use by of_get_drm_display_mode().
While at it, convert spaces to tabs in indentation in drm_modes.h.

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
This commit is contained in:
Lothar Waßmann 2016-07-12 15:30:02 +02:00 committed by Philipp Zabel
parent 29b4817d40
commit d72daa0d75
2 changed files with 17 additions and 1 deletions
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15
drivers/gpu/drm/drm_modes.c
View File

@ -657,6 +657,21 @@ void drm_display_mode_to_videomode(const struct drm_display_mode *dmode,
}
EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode);
void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags)
{
*bus_flags = 0;
if (vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE)
*bus_flags |= DRM_BUS_FLAG_PIXDATA_POSEDGE;
if (vm->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE)
*bus_flags |= DRM_BUS_FLAG_PIXDATA_NEGEDGE;
if (vm->flags & DISPLAY_FLAGS_DE_LOW)
*bus_flags |= DRM_BUS_FLAG_DE_LOW;
if (vm->flags & DISPLAY_FLAGS_DE_HIGH)
*bus_flags |= DRM_BUS_FLAG_DE_HIGH;
}
EXPORT_SYMBOL_GPL(drm_bus_flags_from_videomode);
#ifdef CONFIG_OF
/**
* of_get_drm_display_mode - get a drm_display_mode from devicetree

3
include/drm/drm_modes.h
View File

@ -434,7 +434,7 @@ struct drm_cmdline_mode;
struct drm_display_mode *drm_mode_create(struct drm_device *dev);
void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode);
void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out,
const struct drm_display_mode *in);
const struct drm_display_mode *in);
int drm_mode_convert_umode(struct drm_display_mode *out,
const struct drm_mode_modeinfo *in);
void drm_mode_probed_add(struct drm_connector *connector, struct drm_display_mode *mode);
@ -457,6 +457,7 @@ void drm_display_mode_from_videomode(const struct videomode *vm,
struct drm_display_mode *dmode);
void drm_display_mode_to_videomode(const struct drm_display_mode *dmode,
struct videomode *vm);
void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags);
int of_get_drm_display_mode(struct device_node *np,
struct drm_display_mode *dmode,
int index);