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kernel add
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/*
* Copyright (C) 2015 Broadcom
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/**
* DOC: VC4 KMS
*
* This is the general code for implementing KMS mode setting that
* doesn't clearly associate with any of the other objects (plane,
* crtc, HDMI encoder).
*/
#include "drm_crtc.h"
#include "drm_atomic_helper.h"
#include "drm_crtc_helper.h"
#include "drm_plane_helper.h"
#include "drm_fb_cma_helper.h"
#include "vc4_drv.h"
static void vc4_output_poll_changed(struct drm_device *dev)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
if (vc4->fbdev)
drm_fbdev_cma_hotplug_event(vc4->fbdev);
}
static const struct drm_mode_config_funcs vc4_mode_funcs = {
.output_poll_changed = vc4_output_poll_changed,
.atomic_check = drm_atomic_helper_check,
.atomic_commit = drm_atomic_helper_commit,
.fb_create = drm_fb_cma_create,
};
int vc4_kms_load(struct drm_device *dev)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
int ret;
ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
if (ret < 0) {
dev_err(dev->dev, "failed to initialize vblank
");
return ret;
}
dev->mode_config.max_width = 2048;
dev->mode_config.max_height = 2048;
dev->mode_config.funcs = &vc4_mode_funcs;
dev->mode_config.preferred_depth = 24;
dev->vblank_disable_allowed = true;
drm_mode_config_reset(dev);
vc4->fbdev = drm_fbdev_cma_init(dev, 32,
dev->mode_config.num_crtc,
dev->mode_config.num_connector);
if (IS_ERR(vc4->fbdev))
vc4->fbdev = NULL;
drm_kms_helper_poll_init(dev);
return 0;
}
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