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Commit 6fbb702e authored by Ben Skeggs's avatar Ben Skeggs
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drm/nouveau: make sure display hardware is reinitialised on runtime resume 



Linus commit 05c63c2f modified the
runtime suspend/resume paths to skip over display-related tasks to
avoid locking issues on resume.

Unfortunately, this resulted in the display hardware being left in
a partially initialised state, preventing subsequent modesets from
completing.

This commit unifies the (many) suspend/resume paths, bringing back
display (and fbcon) handling in the runtime paths.

Signed-off-by: default avatarBen Skeggs <bskeggs@redhat.com>
parent 634ffccc

drivers/gpu/drm/nouveau/nouveau_display.c

+11 −12
Original line number Diff line number Diff line
@@ -550,14 +550,12 @@ nouveau_display_destroy(struct drm_device *dev) 
}



int

nouveau_display_suspend(struct drm_device *dev)

nouveau_display_suspend(struct drm_device *dev, bool runtime)

{

	struct nouveau_drm *drm = nouveau_drm(dev);

	struct drm_crtc *crtc;



	nouveau_display_fini(dev);



	NV_INFO(drm, "unpinning framebuffer(s)...\n");

	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {

		struct nouveau_framebuffer *nouveau_fb;
@@ -579,12 +577,13 @@ nouveau_display_suspend(struct drm_device *dev) 
}



void

nouveau_display_repin(struct drm_device *dev)

nouveau_display_resume(struct drm_device *dev, bool runtime)

{

	struct nouveau_drm *drm = nouveau_drm(dev);

	struct drm_crtc *crtc;

	int ret;

	int ret, head;



	/* re-pin fb/cursors */

	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {

		struct nouveau_framebuffer *nouveau_fb;
@@ -606,13 +605,6 @@ nouveau_display_repin(struct drm_device *dev) 
		if (ret)

			NV_ERROR(drm, "Could not pin/map cursor.\n");

	}

}



void

nouveau_display_resume(struct drm_device *dev)

{

	struct drm_crtc *crtc;

	int head;



	nouveau_display_init(dev);
@@ -627,6 +619,13 @@ nouveau_display_resume(struct drm_device *dev) 
	for (head = 0; head < dev->mode_config.num_crtc; head++)

		drm_vblank_on(dev, head);



	/* This should ensure we don't hit a locking problem when someone

	 * wakes us up via a connector.  We should never go into suspend

	 * while the display is on anyways.

	 */

	if (runtime)

		return;



	drm_helper_resume_force_mode(dev);



	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {

drivers/gpu/drm/nouveau/nouveau_display.h

+2 −3
Original line number Diff line number Diff line
@@ -63,9 +63,8 @@ int nouveau_display_create(struct drm_device *dev); 
void nouveau_display_destroy(struct drm_device *dev);

int  nouveau_display_init(struct drm_device *dev);

void nouveau_display_fini(struct drm_device *dev);

int  nouveau_display_suspend(struct drm_device *dev);

void nouveau_display_repin(struct drm_device *dev);

void nouveau_display_resume(struct drm_device *dev);

int  nouveau_display_suspend(struct drm_device *dev, bool runtime);

void nouveau_display_resume(struct drm_device *dev, bool runtime);

int  nouveau_display_vblank_enable(struct drm_device *, int);

void nouveau_display_vblank_disable(struct drm_device *, int);

int  nouveau_display_scanoutpos(struct drm_device *, int, unsigned int,

drivers/gpu/drm/nouveau/nouveau_drm.c

+13 −38
Original line number Diff line number Diff line
@@ -547,9 +547,11 @@ nouveau_do_suspend(struct drm_device *dev, bool runtime) 
	struct nouveau_cli *cli;

	int ret;



	if (dev->mode_config.num_crtc && !runtime) {

	if (dev->mode_config.num_crtc) {

		NV_INFO(drm, "suspending console...\n");

		nouveau_fbcon_set_suspend(dev, 1);

		NV_INFO(drm, "suspending display...\n");

		ret = nouveau_display_suspend(dev);

		ret = nouveau_display_suspend(dev, runtime);

		if (ret)

			return ret;

	}
@@ -603,7 +605,7 @@ nouveau_do_suspend(struct drm_device *dev, bool runtime) 
fail_display:

	if (dev->mode_config.num_crtc) {

		NV_INFO(drm, "resuming display...\n");

		nouveau_display_resume(dev);

		nouveau_display_resume(dev, runtime);

	}

	return ret;

}
@@ -618,9 +620,6 @@ int nouveau_pmops_suspend(struct device *dev) 
	    drm_dev->switch_power_state == DRM_SWITCH_POWER_DYNAMIC_OFF)

		return 0;



	if (drm_dev->mode_config.num_crtc)

		nouveau_fbcon_set_suspend(drm_dev, 1);



	ret = nouveau_do_suspend(drm_dev, false);

	if (ret)

		return ret;
@@ -633,7 +632,7 @@ int nouveau_pmops_suspend(struct device *dev) 
}



static int

nouveau_do_resume(struct drm_device *dev)

nouveau_do_resume(struct drm_device *dev, bool runtime)

{

	struct nouveau_drm *drm = nouveau_drm(dev);

	struct nouveau_cli *cli;
@@ -658,7 +657,9 @@ nouveau_do_resume(struct drm_device *dev) 


	if (dev->mode_config.num_crtc) {

		NV_INFO(drm, "resuming display...\n");

		nouveau_display_repin(dev);

		nouveau_display_resume(dev, runtime);

		NV_INFO(drm, "resuming console...\n");

		nouveau_fbcon_set_suspend(dev, 0);

	}



	return 0;
@@ -681,47 +682,21 @@ int nouveau_pmops_resume(struct device *dev) 
		return ret;

	pci_set_master(pdev);



	ret = nouveau_do_resume(drm_dev);

	if (ret)

		return ret;



	if (drm_dev->mode_config.num_crtc) {

		nouveau_display_resume(drm_dev);

		nouveau_fbcon_set_suspend(drm_dev, 0);

	}



	return 0;

	return nouveau_do_resume(drm_dev, false);

}



static int nouveau_pmops_freeze(struct device *dev)

{

	struct pci_dev *pdev = to_pci_dev(dev);

	struct drm_device *drm_dev = pci_get_drvdata(pdev);

	int ret;



	if (drm_dev->mode_config.num_crtc)

		nouveau_fbcon_set_suspend(drm_dev, 1);



	ret = nouveau_do_suspend(drm_dev, false);

	return ret;

	return nouveau_do_suspend(drm_dev, false);

}



static int nouveau_pmops_thaw(struct device *dev)

{

	struct pci_dev *pdev = to_pci_dev(dev);

	struct drm_device *drm_dev = pci_get_drvdata(pdev);

	int ret;



	ret = nouveau_do_resume(drm_dev);

	if (ret)

		return ret;



	if (drm_dev->mode_config.num_crtc) {

		nouveau_display_resume(drm_dev);

		nouveau_fbcon_set_suspend(drm_dev, 0);

	}



	return 0;

	return nouveau_do_resume(drm_dev, false);

}
@@ -977,7 +952,7 @@ static int nouveau_pmops_runtime_resume(struct device *dev) 
		return ret;

	pci_set_master(pdev);



	ret = nouveau_do_resume(drm_dev);

	ret = nouveau_do_resume(drm_dev, true);

	drm_kms_helper_poll_enable(drm_dev);

	/* do magic */

	nvif_mask(device, 0x88488, (1 << 25), (1 << 25));