mirror of https://gitee.com/openkylin/linux.git
drm/radeon/kms: Disable both CRTCs during mode switch
Reconfiguring one CRTC whilst another is running can cause a hang under some circumstances. Unfortunately we haven't pinpointed exactly what those circumstances are, so disable all CRTCs for every mode switch. Signed-off-by: Pierre Ossman <pierre@ossman.eu> Acked-by: Alex Deucher <alexdeucher@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
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@ -1047,12 +1047,29 @@ static int radeon_crtc_mode_set(struct drm_crtc *crtc,
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static void radeon_crtc_prepare(struct drm_crtc *crtc)
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{
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radeon_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
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struct drm_device *dev = crtc->dev;
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struct drm_crtc *crtci;
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/*
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* The hardware wedges sometimes if you reconfigure one CRTC
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* whilst another is running (see fdo bug #24611).
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*/
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list_for_each_entry(crtci, &dev->mode_config.crtc_list, head)
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radeon_crtc_dpms(crtci, DRM_MODE_DPMS_OFF);
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}
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static void radeon_crtc_commit(struct drm_crtc *crtc)
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{
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radeon_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
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struct drm_device *dev = crtc->dev;
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struct drm_crtc *crtci;
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/*
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* Reenable the CRTCs that should be running.
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*/
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list_for_each_entry(crtci, &dev->mode_config.crtc_list, head) {
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if (crtci->enabled)
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radeon_crtc_dpms(crtci, DRM_MODE_DPMS_ON);
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}
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}
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static const struct drm_crtc_helper_funcs legacy_helper_funcs = {
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