Unverified Commit ab83b7f6 authored by Herve Codina's avatar Herve Codina Committed by Maxime Ripard
Browse files

drm/atomic-helper: Introduce drm_atomic_helper_reset_crtc() 



drm_atomic_helper_reset_crtc() allows to reset the CRTC active outputs.

This resets all active components available between the CRTC and
connectors.

Signed-off-by: default avatarHerve Codina <herve.codina@bootlin.com>
Reviewed-by: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: default avatarMaxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20250210132620.42263-3-herve.codina@bootlin.com


Signed-off-by: default avatarMaxime Ripard <mripard@kernel.org>
parent feb7ef6e

drivers/gpu/drm/drm_atomic_helper.c

+41 −0
Original line number Diff line number Diff line
@@ -3400,6 +3400,47 @@ int drm_atomic_helper_disable_all(struct drm_device *dev, 
}

EXPORT_SYMBOL(drm_atomic_helper_disable_all);



/**

 * drm_atomic_helper_reset_crtc - reset the active outputs of a CRTC

 * @crtc: DRM CRTC

 * @ctx: lock acquisition context

 *

 * Reset the active outputs by indicating that connectors have changed.

 * This implies a reset of all active components available between the CRTC and

 * connectors.

 *

 * Returns:

 * 0 on success or a negative error code on failure.

 */

int drm_atomic_helper_reset_crtc(struct drm_crtc *crtc,

				 struct drm_modeset_acquire_ctx *ctx)

{

	struct drm_atomic_state *state;

	struct drm_crtc_state *crtc_state;

	int ret;



	state = drm_atomic_state_alloc(crtc->dev);

	if (!state)

		return -ENOMEM;



	state->acquire_ctx = ctx;



	crtc_state = drm_atomic_get_crtc_state(state, crtc);

	if (IS_ERR(crtc_state)) {

		ret = PTR_ERR(crtc_state);

		goto out;

	}



	crtc_state->connectors_changed = true;



	ret = drm_atomic_commit(state);

out:

	drm_atomic_state_put(state);



	return ret;

}

EXPORT_SYMBOL(drm_atomic_helper_reset_crtc);



/**

 * drm_atomic_helper_shutdown - shutdown all CRTC

 * @dev: DRM device

include/drm/drm_atomic_helper.h

+2 −0
Original line number Diff line number Diff line
@@ -139,6 +139,8 @@ int drm_atomic_helper_set_config(struct drm_mode_set *set, 


int drm_atomic_helper_disable_all(struct drm_device *dev,

				  struct drm_modeset_acquire_ctx *ctx);

int drm_atomic_helper_reset_crtc(struct drm_crtc *crtc,

				 struct drm_modeset_acquire_ctx *ctx);

void drm_atomic_helper_shutdown(struct drm_device *dev);

struct drm_atomic_state *

drm_atomic_helper_duplicate_state(struct drm_device *dev,