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Commit ebc64e45 authored by Steffen Trumtrar's avatar Steffen Trumtrar
Browse files

drm_modes: add videomode helpers 



Add conversion from videomode to drm_display_mode

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 79089044

drivers/gpu/drm/drm_modes.c

+37 −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/videomode.h>



/**

 * drm_mode_debug_printmodeline - debug print a mode
@@ -504,6 +505,42 @@ drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh, 
}

EXPORT_SYMBOL(drm_gtf_mode);



#if IS_ENABLED(CONFIG_VIDEOMODE)

int drm_display_mode_from_videomode(const struct videomode *vm,

				    struct drm_display_mode *dmode)

{

	dmode->hdisplay = vm->hactive;

	dmode->hsync_start = dmode->hdisplay + vm->hfront_porch;

	dmode->hsync_end = dmode->hsync_start + vm->hsync_len;

	dmode->htotal = dmode->hsync_end + vm->hback_porch;



	dmode->vdisplay = vm->vactive;

	dmode->vsync_start = dmode->vdisplay + vm->vfront_porch;

	dmode->vsync_end = dmode->vsync_start + vm->vsync_len;

	dmode->vtotal = dmode->vsync_end + vm->vback_porch;



	dmode->clock = vm->pixelclock / 1000;



	dmode->flags = 0;

	if (vm->dmt_flags & VESA_DMT_HSYNC_HIGH)

		dmode->flags |= DRM_MODE_FLAG_PHSYNC;

	else if (vm->dmt_flags & VESA_DMT_HSYNC_LOW)

		dmode->flags |= DRM_MODE_FLAG_NHSYNC;

	if (vm->dmt_flags & VESA_DMT_VSYNC_HIGH)

		dmode->flags |= DRM_MODE_FLAG_PVSYNC;

	else if (vm->dmt_flags & VESA_DMT_VSYNC_LOW)

		dmode->flags |= DRM_MODE_FLAG_NVSYNC;

	if (vm->data_flags & DISPLAY_FLAGS_INTERLACED)

		dmode->flags |= DRM_MODE_FLAG_INTERLACE;

	if (vm->data_flags & DISPLAY_FLAGS_DOUBLESCAN)

		dmode->flags |= DRM_MODE_FLAG_DBLSCAN;

	drm_mode_set_name(dmode);



	return 0;

}

EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode);

#endif



/**

 * drm_mode_set_name - set the name on a mode

 * @mode: name will be set in this mode

include/drm/drmP.h

+5 −0
Original line number Diff line number Diff line
@@ -85,6 +85,8 @@ struct module; 
struct drm_file;

struct drm_device;



struct videomode;



#include <drm/drm_os_linux.h>

#include <drm/drm_hashtab.h>

#include <drm/drm_mm.h>
@@ -1456,6 +1458,9 @@ extern struct drm_display_mode * 
drm_mode_create_from_cmdline_mode(struct drm_device *dev,

				  struct drm_cmdline_mode *cmd);



extern int drm_display_mode_from_videomode(const struct videomode *vm,

					   struct drm_display_mode *dmode);



/* Modesetting support */

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

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