search for: nouveau_display_resum

...+ nvidia), and the backtrace has > runtime pm in it, which is something new Dave added for 3.12, adding > him in explicitly. The simplest explanation is that disp->init is > NULL. And it seems like there are no outputs from the earlier nouveau > init prints. I guess that the call to nouveau_display_resume from > nouveau_pmops_runtime_resume should be guarded by a if > (dev->mode_config.num_crtc) like it is everywhere else. > > -ilia Your guess was right, this (hopefully attached patch) fixes it for me! Thanks, Tobias

...s >>> runtime pm in it, which is something new Dave added for 3.12, adding >>> him in explicitly. The simplest explanation is that disp->init is >>> NULL. And it seems like there are no outputs from the earlier nouveau >>> init prints. I guess that the call to nouveau_display_resume from >>> nouveau_pmops_runtime_resume should be guarded by a if >>> (dev->mode_config.num_crtc) like it is everywhere else. >>> >>> -ilia >> Your guess was right, this (hopefully attached patch) fixes it for me! > Does it look like this one? >...

...ay_fini(dev, true); + nouveau_display_fini(dev, true, runtime); return 0; } - nouveau_display_fini(dev, true); + nouveau_display_fini(dev, true, runtime); list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { struct nouveau_framebuffer *nouveau_fb; @@ -656,7 +670,7 @@ nouveau_display_resume(struct drm_device *dev, bool runtime) int ret; if (drm_drv_uses_atomic_modeset(dev)) { - nouveau_display_init(dev); + nouveau_display_init(dev, runtime); if (disp->suspend) { drm_atomic_helper_resume(dev, disp->suspend); disp->suspend = NULL; @@ -689,7 +703,7 @@ nouveau...

...have Optimus (intel + nvidia), and the backtrace has runtime pm in it, which is something new Dave added for 3.12, adding him in explicitly. The simplest explanation is that disp->init is NULL. And it seems like there are no outputs from the earlier nouveau init prints. I guess that the call to nouveau_display_resume from nouveau_pmops_runtime_resume should be guarded by a if (dev->mode_config.num_crtc) like it is everywhere else. -ilia > > BUG: unable to handle kernel NULL pointer dereference at (null) > IP: [< (null)>] (null) > PGD 24eaa0067 PUD 24e7ac067 PMD 0 &gt...

Signed-off-by: Maarten Lankhorst <maarten.lankhorst at ubuntu.com> --- diff --git a/drivers/gpu/drm/nouveau/nouveau_fbcon.c b/drivers/gpu/drm/nouveau/nouveau_fbcon.c index 3ed12a8cfc91..a4a586807903 100644 --- a/drivers/gpu/drm/nouveau/nouveau_fbcon.c +++ b/drivers/gpu/drm/nouveau/nouveau_fbcon.c @@ -370,6 +370,7 @@ nouveau_fbcon_create(struct drm_fb_helper *helper, ret = -ENOMEM; goto

Signed-off-by: Lyude Paul <lyude at redhat.com> --- drivers/gpu/drm/nouveau/nouveau_display.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/nouveau/nouveau_display.c b/drivers/gpu/drm/nouveau/nouveau_display.c index ec7861457b84..b2a93e3fa67b 100644 --- a/drivers/gpu/drm/nouveau/nouveau_display.c +++ b/drivers/gpu/drm/nouveau/nouveau_display.c @@ -387,6 +387,7 @@

...veau_drm.c +++ b/drivers/gpu/drm/nouveau/nouveau_drm.c @@ -544,7 +544,7 @@ nouveau_do_resume(struct drm_device *dev) nouveau_pm_resume(dev); if (dev->mode_config.num_crtc) { - NV_INFO(drm, "resuming display...\n"); + NV_INFO(drm, "resuming display and fbcon...\n"); nouveau_display_resume(dev); } return 0; diff --git a/drivers/gpu/drm/nouveau/nouveau_fbcon.c b/drivers/gpu/drm/nouveau/nouveau_fbcon.c index b035317..46e37c0 100644 --- a/drivers/gpu/drm/nouveau/nouveau_fbcon.c +++ b/drivers/gpu/drm/nouveau/nouveau_fbcon.c @@ -514,10 +514,10 @@ void nouveau_fbcon_set_suspend(struct...

..._fbcon_set_suspend(dev, FBINFO_STATE_SUSPENDED, true); NV_INFO(drm, "suspending display...\n"); ret = nouveau_display_suspend(dev, runtime); if (ret) @@ -635,7 +635,7 @@ nouveau_do_resume(struct drm_device *dev, bool runtime) NV_INFO(drm, "resuming display...\n"); nouveau_display_resume(dev, runtime); NV_INFO(drm, "resuming console...\n"); - nouveau_fbcon_set_suspend(dev, 0); + nouveau_fbcon_set_suspend(dev, FBINFO_STATE_RUNNING, false); } return 0; diff --git a/drivers/gpu/drm/nouveau/nouveau_drv.h b/drivers/gpu/drm/nouveau/nouveau_drv.h index 822a021..a743d...

As it turns out, on cards that actually have CRTCs on them we're already calling drm_kms_helper_poll_enable(drm_dev) from nouveau_display_resume() before we call it in nouveau_pmops_runtime_resume(). This leads us to accidentally trying to enable polling twice, which results in a potential deadlock between the RPM locks and drm_dev->mode_config.mutex if we end up trying to enable polling the second time while output_poll_execute is runn...

...spend(dev, runtime); if (ret) - return ret; + goto fail_fbcon; } NV_DEBUG(drm, "evicting buffers...\n"); @@ -719,7 +720,14 @@ nouveau_do_suspend(struct drm_device *dev, bool runtime) if (dev->mode_config.num_crtc) { NV_DEBUG(drm, "resuming display...\n"); nouveau_display_resume(dev, runtime); + +fail_fbcon: + NV_DEBUG(drm, "resuming console...\n"); + nouveau_fbcon_set_suspend(dev, 0); } + + nouveau_led_resume(dev); + return ret; } -- 2.17.1

This doesn't do anything, drm_kms_helper_poll_enable() gets called in nouveau_pmops_resume()->nouveau_display_resume()->nouveau_display_init() already. Signed-off-by: Lyude Paul <lyude at redhat.com> Reviewed-by: Karol Herbst <kherbst at redhat.com> Acked-by: Daniel Vetter <daniel at ffwll.ch> Cc: Lukas Wunner <lukas at wunner.de> --- drivers/gpu/drm/nouveau/nouveau_vga.c | 1 - 1 fi...

...the backtrace has >> runtime pm in it, which is something new Dave added for 3.12, adding >> him in explicitly. The simplest explanation is that disp->init is >> NULL. And it seems like there are no outputs from the earlier nouveau >> init prints. I guess that the call to nouveau_display_resume from >> nouveau_pmops_runtime_resume should be guarded by a if >> (dev->mode_config.num_crtc) like it is everywhere else. >> >> -ilia > > Your guess was right, this (hopefully attached patch) fixes it for me! Does it look like this one? Dave. -------------- nex...

...t; runtime pm in it, which is something new Dave added for 3.12, adding >>>> him in explicitly. The simplest explanation is that disp->init is >>>> NULL. And it seems like there are no outputs from the earlier nouveau >>>> init prints. I guess that the call to nouveau_display_resume from >>>> nouveau_pmops_runtime_resume should be guarded by a if >>>> (dev->mode_config.num_crtc) like it is everywhere else. >>>> >>>> -ilia >>> >>> Your guess was right, this (hopefully attached patch) fixes it for me! >&...

...ad) { @@ -537,6 +539,10 @@ fail_client: nouveau_client_init(&cli->base); } + if (drm->fence && nouveau_fence(drm)->resume) + nouveau_fence(drm)->resume(drm); + +fail_display: if (dev->mode_config.num_crtc) { NV_INFO(drm, "resuming display...\n"); nouveau_display_resume(dev); -- 1.8.3.2

...y(struct drm_device *dev); int nouveau_display_init(struct drm_device *dev); -void nouveau_display_fini(struct drm_device *dev, bool suspend); +void nouveau_display_fini(struct drm_device *dev, bool suspend, bool runtime); 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 *, unsigned int); diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c index f5d3158f0378..20d4ab647cf7 100644 --- a/drivers/gpu/drm/nouveau/nouveau_drm.c +++ b/driver...

...ruct nouveau_display *disp = nouveau_display(dev); struct drm_crtc *crtc; - if (dev->mode_config.funcs->atomic_commit) { + if (drm_drv_uses_atomic_modeset(dev)) { if (!runtime) { disp->suspend = nouveau_atomic_suspend(dev); if (IS_ERR(disp->suspend)) { @@ -784,7 +784,7 @@ nouveau_display_resume(struct drm_device *dev, bool runtime) struct drm_crtc *crtc; int ret; - if (dev->mode_config.funcs->atomic_commit) { + if (drm_drv_uses_atomic_modeset(dev)) { nouveau_display_init(dev); if (disp->suspend) { drm_atomic_helper_resume(dev, disp->suspend); diff --git a/driv...

Does what it says on the label, a lot of these calls are already handled somewhere else and don't appear to be here for a legitimate reason anymore. Lyude Paul (3): drm/nouveau: Remove useless poll_enable() call in switcheroo_set_state() drm/nouveau: Remove useless poll_disable() call in switcheroo_set_state() drm/nouveau: Remove useless poll_enable() call in drm_load()

Next version of https://patchwork.freedesktop.org/series/48131/ Only changes are new A-Bs and R-Bs Lyude Paul (3): drm/nouveau: Remove useless poll_enable() call in switcheroo_set_state() drm/nouveau: Remove useless poll_disable() call in switcheroo_set_state() drm/nouveau: Remove useless poll_enable() call in drm_load() drivers/gpu/drm/nouveau/nouveau_drm.c | 4 +---

...m/nouveau/nouveau_display.h b/drivers/gpu/drm/nouveau/nouveau_display.h index 6e8e66882e45..71e2af693f7f 100644 --- a/drivers/gpu/drm/nouveau/nouveau_display.h +++ b/drivers/gpu/drm/nouveau/nouveau_display.h @@ -63,7 +63,7 @@ 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 *, unsigned int); void nouveau_display_vblank_disable(struct drm_device *, unsigned int); -bool nouveau_display_scanoutpos(struct drm_device *, unsigned int, +bool nouveau_display_scanoutpos(struct drm_...

.../nouveau/nouveau_display.h b/drivers/gpu/drm/nouveau/nouveau_display.h index 6e8e66882e45..26d34f1a77da 100644 --- a/drivers/gpu/drm/nouveau/nouveau_display.h +++ b/drivers/gpu/drm/nouveau/nouveau_display.h @@ -63,9 +63,10 @@ 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 *, unsigned int); void nouveau_display_vblank_disable(struct drm_device *, unsigned int); -bool nouveau_display_scanoutpos(struct drm_device *, unsigned int, - bool, int *, int *, ktime_t *, - kt...