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Commit edb37a95 authored by Steffen Trumtrar's avatar Steffen Trumtrar
Browse files

drm_modes: add of_videomode helpers 



Add helper to get drm_display_mode from devicetree.

Signed-off-by: default avatarSteffen Trumtrar <s.trumtrar@pengutronix.de>
Reviewed-by: default avatarThierry Reding <thierry.reding@avionic-design.de>
Acked-by: default avatarThierry Reding <thierry.reding@avionic-design.de>
Tested-by: default avatarThierry Reding <thierry.reding@avionic-design.de>
Tested-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: default avatarAfzal Mohammed <Afzal@ti.com>
Tested-by: default avatarRob Clark <robclark@gmail.com>
Tested-by: default avatarLeela Krishna Amudala <leelakrishna.a@gmail.com>
parent ebc64e45

drivers/gpu/drm/drm_modes.c

+33 −0
Original line number Diff line number Diff line
@@ -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

include/drm/drmP.h

+4 −0
Original line number Diff line number Diff line
@@ -85,6 +85,7 @@ struct module; 
struct drm_file;

struct drm_device;



struct device_node;

struct videomode;



#include <drm/drm_os_linux.h>
@@ -1460,6 +1461,9 @@ drm_mode_create_from_cmdline_mode(struct drm_device *dev, 


extern int drm_display_mode_from_videomode(const struct videomode *vm,

					   struct drm_display_mode *dmode);

extern int of_get_drm_display_mode(struct device_node *np,

				   struct drm_display_mode *dmode,

				   int index);



/* Modesetting support */

extern void drm_vblank_pre_modeset(struct drm_device *dev, int crtc);