kernel/drivers/staging/imgtec/drm_nulldisp_drv.h

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/*************************************************************************/ /*!
@File
@Codingstyle    LinuxKernel
@Copyright      Copyright (c) Imagination Technologies Ltd. All Rights Reserved
@License        MIT

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*/ /**************************************************************************/

#ifndef __DRM_NULLDISP_DRV_H__
#define __DRM_NULLDISP_DRV_H__

#include <linux/version.h>

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0))
#include <drm/drm_fourcc.h>
#endif

struct drm_framebuffer;

/******************************************************************************
 * Linux compatibility functions
 ******************************************************************************/
static inline u32 nulldisp_drm_fb_format(struct drm_framebuffer *fb)
{
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0))
	return fb->format->format;
#else	/* (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0)) */
	return fb->pixel_format;
#endif	/* (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0)) */
}

static inline u64 nulldisp_drm_fb_modifier(struct drm_framebuffer *fb)
{
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 10, 0))
	return fb->modifier;
#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 1, 0))
	return fb->modifier[0];
#else
	/* 0 represents DRM_FORMAT_MOD_NONE, doesn't exist before 4.1 */
	return 0;
#endif
}

/******************************************************************************
 * DRM framebuffer support functions
 ******************************************************************************/
static inline int nulldisp_drm_fb_num_planes(struct drm_framebuffer *fb)
{
	return drm_format_num_planes(nulldisp_drm_fb_format(fb));
}
#endif /* __DRM_NULLDISP_DRV_H__ */