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drm/nouveau: make sure display hardware is reinitialised on runtime resume 

Linus commit 05c63c2ff2 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: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2014-10-02 13:22:27 +10:00
parent 634ffcccfb
commit 6fbb702e27
3 changed files with 26 additions and 53 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/gpu/drm/nouveau/nouveau_display.c
View File

@ -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) {

5
drivers/gpu/drm/nouveau/nouveau_display.h
View File

@ -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,

51
drivers/gpu/drm/nouveau/nouveau_drm.c
View File

@ -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));