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| author | Steffen Trumtrar <s.trumtrar@pengutronix.de> | 2012-10-28 18:28:06 +0100 |
|---|---|---|
| committer | Steffen Trumtrar <s.trumtrar@pengutronix.de> | 2013-01-24 09:04:14 +0100 |
| commit | edb37a95c58147f89713e6c5cd220fa8fdfb4833 (patch) | |
| tree | f4f344a417e57d115e80f2bffc05d2b81c08986c /drivers/gpu/drm/drm_modes.c | |
| parent | ebc64e453857e93b230881f48126257be9aa8830 (diff) | |
| download | linux-0-day-edb37a95c58147f89713e6c5cd220fa8fdfb4833.tar.gz linux-0-day-edb37a95c58147f89713e6c5cd220fa8fdfb4833.tar.xz | |
drm_modes: add of_videomode helpers
Add helper to get drm_display_mode from devicetree.
Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Reviewed-by: Thierry Reding <thierry.reding@avionic-design.de>
Acked-by: Thierry Reding <thierry.reding@avionic-design.de>
Tested-by: Thierry Reding <thierry.reding@avionic-design.de>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Afzal Mohammed <Afzal@ti.com>
Tested-by: Rob Clark <robclark@gmail.com>
Tested-by: Leela Krishna Amudala <leelakrishna.a@gmail.com>
Diffstat (limited to 'drivers/gpu/drm/drm_modes.c')
| -rw-r--r-- | drivers/gpu/drm/drm_modes.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c index 9f3f20bde3993..04fa6f1808d15 100644 --- a/drivers/gpu/drm/drm_modes.c +++ b/drivers/gpu/drm/drm_modes.c @@ -35,6 +35,7 @@ #include <linux/export.h> #include <drm/drmP.h> #include <drm/drm_crtc.h> +#include <video/of_videomode.h> #include <video/videomode.h> /** @@ -541,6 +542,38 @@ int drm_display_mode_from_videomode(const struct videomode *vm, EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode); #endif +#if IS_ENABLED(CONFIG_OF_VIDEOMODE) +/** + * of_get_drm_display_mode - get a drm_display_mode from devicetree + * @np: device_node with the timing specification + * @dmode: will be set to the return value + * @index: index into the list of display timings in devicetree + * + * This function is expensive and should only be used, if only one mode is to be + * read from DT. To get multiple modes start with of_get_display_timings and + * work with that instead. + */ +int of_get_drm_display_mode(struct device_node *np, + struct drm_display_mode *dmode, int index) +{ + struct videomode vm; + int ret; + + ret = of_get_videomode(np, &vm, index); + if (ret) + return ret; + + drm_display_mode_from_videomode(&vm, dmode); + + pr_debug("%s: got %dx%d display mode from %s\n", + of_node_full_name(np), vm.hactive, vm.vactive, np->name); + drm_mode_debug_printmodeline(dmode); + + return 0; +} +EXPORT_SYMBOL_GPL(of_get_drm_display_mode); +#endif + /** * drm_mode_set_name - set the name on a mode * @mode: name will be set in this mode |