Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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#include <linux/export.h>
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#include <drm/drm_atomic.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_bridge.h>
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#include <drm/drm_bridge_helper.h>
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#include <drm/drm_modeset_lock.h>
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/**
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* drm_bridge_helper_reset_crtc - Reset the pipeline feeding a bridge
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* @bridge: DRM bridge to reset
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* @ctx: lock acquisition context
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*
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* Reset a @bridge pipeline. It will power-cycle all active components
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* between the CRTC and connector that bridge is connected to.
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*
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* As it relies on drm_atomic_helper_reset_crtc(), the same limitations
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* apply.
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*
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* Returns:
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*
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* 0 on success or a negative error code on failure. If the error
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* returned is EDEADLK, the whole atomic sequence must be restarted.
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*/
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int drm_bridge_helper_reset_crtc(struct drm_bridge *bridge,
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struct drm_modeset_acquire_ctx *ctx)
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{
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struct drm_connector *connector;
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struct drm_encoder *encoder = bridge->encoder;
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struct drm_device *dev = encoder->dev;
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struct drm_crtc *crtc;
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int ret;
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ret = drm_modeset_lock(&dev->mode_config.connection_mutex, ctx);
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if (ret)
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return ret;
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connector = drm_atomic_get_connector_for_encoder(encoder, ctx);
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if (IS_ERR(connector)) {
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ret = PTR_ERR(connector);
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goto out;
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}
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if (!connector->state) {
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ret = -EINVAL;
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goto out;
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}
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crtc = connector->state->crtc;
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ret = drm_atomic_helper_reset_crtc(crtc, ctx);
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if (ret)
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goto out;
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out:
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drm_modeset_unlock(&dev->mode_config.connection_mutex);
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return ret;
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}
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EXPORT_SYMBOL(drm_bridge_helper_reset_crtc);
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