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#include 

#include 

#include 

#include 

/**

 * DOC: overview

 *

 * The CRTC modeset helper library provides a default set_config implementation

 * in drm_crtc_helper_set_config(). Plus a few other convenience functions using

 * the same callbacks which drivers can use to e.g. restore the modeset

 * configuration on resume with drm_helper_resume_force_mode().

 *

 * The driver callbacks are mostly compatible with the atomic modeset helpers,

 * except for the handling of the primary plane: Atomic helpers require that the

 * primary plane is implemented as a real standalone plane and not directly tied

 * to the CRTC state. For easier transition this library provides functions to

 * implement the old semantics required by the CRTC helpers using the new plane

 * and atomic helper callbacks.

 *

 * Drivers are strongly urged to convert to the atomic helpers (by way of first

 * converting to the plane helpers). New drivers must not use these functions

 * but need to implement the atomic interface instead, potentially using the

/**

 * drm_helper_crtc_mode_set - mode_set implementation for atomic plane helpers

 * @crtc: DRM CRTC

 * @mode: DRM display mode which userspace requested

 * @adjusted_mode: DRM display mode adjusted by ->mode_fixup callbacks

 * @x: x offset of the CRTC scanout area on the underlying framebuffer

 * @y: y offset of the CRTC scanout area on the underlying framebuffer

 * @old_fb: previous framebuffer

 *

 * This function implements a callback useable as the ->mode_set callback

 * required by the crtc helpers. Besides the atomic plane helper functions for

 * the primary plane the driver must also provide the ->mode_set_nofb callback

 * to set up the crtc.

 *

 * This is a transitional helper useful for converting drivers to the atomic

 * interfaces.

 */

int drm_helper_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,

			     struct drm_display_mode *adjusted_mode, int x, int y,

			     struct drm_framebuffer *old_fb)

{

	struct drm_crtc_state *crtc_state;

	struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;

	int ret;

	if (crtc->funcs->atomic_duplicate_state)

		crtc_state = crtc->funcs->atomic_duplicate_state(crtc);

	else if (crtc->state)

		crtc_state = kmemdup(crtc->state, sizeof(*crtc_state),

				     GFP_KERNEL);

	else

		crtc_state = kzalloc(sizeof(*crtc_state), GFP_KERNEL);

	if (!crtc_state)

		return -ENOMEM;

	crtc_state->enable = true;

	crtc_state->planes_changed = true;

	crtc_state->mode_changed = true;

	drm_mode_copy(&crtc_state->mode, mode);

	drm_mode_copy(&crtc_state->adjusted_mode, adjusted_mode);

	if (crtc_funcs->atomic_check) {

		ret = crtc_funcs->atomic_check(crtc, crtc_state);

		if (ret) {

			kfree(crtc_state);

			return ret;

		}

	}

	swap(crtc->state, crtc_state);

	crtc_funcs->mode_set_nofb(crtc);

	if (crtc_state) {

		if (crtc->funcs->atomic_destroy_state)

			crtc->funcs->atomic_destroy_state(crtc, crtc_state);

		else

			kfree(crtc_state);

	}

	return drm_helper_crtc_mode_set_base(crtc, x, y, old_fb);

}

EXPORT_SYMBOL(drm_helper_crtc_mode_set);

/**

 * drm_helper_crtc_mode_set_base - mode_set_base implementation for atomic plane helpers

 * @crtc: DRM CRTC

 * @x: x offset of the CRTC scanout area on the underlying framebuffer

 * @y: y offset of the CRTC scanout area on the underlying framebuffer

 * @old_fb: previous framebuffer

 *

 * This function implements a callback useable as the ->mode_set_base used

 * required by the crtc helpers. The driver must provide the atomic plane helper

 * functions for the primary plane.

 *

 * This is a transitional helper useful for converting drivers to the atomic

 * interfaces.

 */

int drm_helper_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,

				  struct drm_framebuffer *old_fb)

{

	struct drm_plane_state *plane_state;

	struct drm_plane *plane = crtc->primary;

	if (plane->funcs->atomic_duplicate_state)

		plane_state = plane->funcs->atomic_duplicate_state(plane);

	else if (plane->state)

		plane_state = drm_atomic_helper_plane_duplicate_state(plane);

	else

		plane_state = kzalloc(sizeof(*plane_state), GFP_KERNEL);

	if (!plane_state)

		return -ENOMEM;

	plane_state->crtc = crtc;

	drm_atomic_set_fb_for_plane(plane_state, crtc->primary->fb);

	plane_state->crtc_x = 0;

	plane_state->crtc_y = 0;

	plane_state->crtc_h = crtc->mode.vdisplay;

	plane_state->crtc_w = crtc->mode.hdisplay;

	plane_state->src_x = x << 16;

	plane_state->src_y = y << 16;

	plane_state->src_h = crtc->mode.vdisplay << 16;

	plane_state->src_w = crtc->mode.hdisplay << 16;

	return drm_plane_helper_commit(plane, plane_state, old_fb);

}

EXPORT_SYMBOL(drm_helper_crtc_mode_set_base);