| Message ID | 20240717090102.968152-2-jfalempe@redhat.com (mailing list archive) |
|---|---|
| State | Handled Elsewhere, archived |
| Headers | show |
| Series | drm/panic: Remove build time dependency with FRAMEBUFFER_CONSOLE | expand |
Jocelyn Falempe <jfalempe@redhat.com> writes: Hello Jocelyn, > It allows to check if the drm device supports drm_panic. > Prepare the work to have better integration with fbcon and vtconsole. > > Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com> > --- > drivers/gpu/drm/drm_panic.c | 20 ++++++++++++++++++++ > include/drm/drm_panic.h | 2 ++ > 2 files changed, 22 insertions(+) > > diff --git a/drivers/gpu/drm/drm_panic.c b/drivers/gpu/drm/drm_panic.c > index 948aed00595e..d9a25c2d0a65 100644 > --- a/drivers/gpu/drm/drm_panic.c > +++ b/drivers/gpu/drm/drm_panic.c > @@ -703,6 +703,26 @@ static void debugfs_register_plane(struct drm_plane *plane, int index) > static void debugfs_register_plane(struct drm_plane *plane, int index) {} > #endif /* CONFIG_DRM_PANIC_DEBUG */ > > +/** > + * drm_panic_is_enabled > + * @dev: the drm device that may supports drm_panic > + * > + * returns true if the drm device supports drm_panic > + */ > +bool drm_panic_is_enabled(struct drm_device *dev) > +{ > + struct drm_plane *plane; > + > + if (!dev->mode_config.num_total_plane) > + return false; > + > + drm_for_each_plane(plane, dev) > + if (plane->helper_private && plane->helper_private->get_scanout_buffer) > + return true; > + return false; > +} > +EXPORT_SYMBOL(drm_panic_is_enabled); > + Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
On Wed, Jul 17, 2024 at 10:48:39AM +0200, Jocelyn Falempe wrote: > It allows to check if the drm device supports drm_panic. > Prepare the work to have better integration with fbcon and vtconsole. > > Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com> > --- > drivers/gpu/drm/drm_panic.c | 20 ++++++++++++++++++++ > include/drm/drm_panic.h | 2 ++ > 2 files changed, 22 insertions(+) > > diff --git a/drivers/gpu/drm/drm_panic.c b/drivers/gpu/drm/drm_panic.c > index 948aed00595e..d9a25c2d0a65 100644 > --- a/drivers/gpu/drm/drm_panic.c > +++ b/drivers/gpu/drm/drm_panic.c > @@ -703,6 +703,26 @@ static void debugfs_register_plane(struct drm_plane *plane, int index) > static void debugfs_register_plane(struct drm_plane *plane, int index) {} > #endif /* CONFIG_DRM_PANIC_DEBUG */ > > +/** > + * drm_panic_is_enabled > + * @dev: the drm device that may supports drm_panic > + * > + * returns true if the drm device supports drm_panic > + */ > +bool drm_panic_is_enabled(struct drm_device *dev) > +{ > + struct drm_plane *plane; > + > + if (!dev->mode_config.num_total_plane) > + return false; > + > + drm_for_each_plane(plane, dev) > + if (plane->helper_private && plane->helper_private->get_scanout_buffer) > + return true; > + return false; > +} > +EXPORT_SYMBOL(drm_panic_is_enabled); This feels like overkill since you currently only have one user in the fbdev emulation code, but maybe useful in some other places ... > + > /** > * drm_panic_register() - Initialize DRM panic for a device > * @dev: the drm device on which the panic screen will be displayed. > diff --git a/include/drm/drm_panic.h b/include/drm/drm_panic.h > index 73bb3f3d9ed9..c3a358dc3e27 100644 > --- a/include/drm/drm_panic.h > +++ b/include/drm/drm_panic.h > @@ -148,11 +148,13 @@ struct drm_scanout_buffer { > > #ifdef CONFIG_DRM_PANIC > > +bool drm_panic_is_enabled(struct drm_device *dev); Since it's internal only, this should be in drivers/gpu/drm/drm_crtc_internal.h and not int he include for drivers. With that: Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> > void drm_panic_register(struct drm_device *dev); > void drm_panic_unregister(struct drm_device *dev); These two are only used in drm.ko. Can you please move them to drm_crtc_internal.h too and drop the EXPORT_SYMBOL in a follow-up patch? We're trying to limit the exported interface and official headers to really only the pieces drivers actually need. Thanks, Sima > > #else > > +bool drm_panic_is_enabled(struct drm_device *dev) {return false; } > static inline void drm_panic_register(struct drm_device *dev) {} > static inline void drm_panic_unregister(struct drm_device *dev) {} > > -- > 2.45.2 >
On 17/07/2024 17:08, Daniel Vetter wrote: > On Wed, Jul 17, 2024 at 10:48:39AM +0200, Jocelyn Falempe wrote: >> It allows to check if the drm device supports drm_panic. >> Prepare the work to have better integration with fbcon and vtconsole. >> >> Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com> >> --- >> drivers/gpu/drm/drm_panic.c | 20 ++++++++++++++++++++ >> include/drm/drm_panic.h | 2 ++ >> 2 files changed, 22 insertions(+) >> >> diff --git a/drivers/gpu/drm/drm_panic.c b/drivers/gpu/drm/drm_panic.c >> index 948aed00595e..d9a25c2d0a65 100644 >> --- a/drivers/gpu/drm/drm_panic.c >> +++ b/drivers/gpu/drm/drm_panic.c >> @@ -703,6 +703,26 @@ static void debugfs_register_plane(struct drm_plane *plane, int index) >> static void debugfs_register_plane(struct drm_plane *plane, int index) {} >> #endif /* CONFIG_DRM_PANIC_DEBUG */ >> >> +/** >> + * drm_panic_is_enabled >> + * @dev: the drm device that may supports drm_panic >> + * >> + * returns true if the drm device supports drm_panic >> + */ >> +bool drm_panic_is_enabled(struct drm_device *dev) >> +{ >> + struct drm_plane *plane; >> + >> + if (!dev->mode_config.num_total_plane) >> + return false; >> + >> + drm_for_each_plane(plane, dev) >> + if (plane->helper_private && plane->helper_private->get_scanout_buffer) >> + return true; >> + return false; >> +} >> +EXPORT_SYMBOL(drm_panic_is_enabled); > > This feels like overkill since you currently only have one user in the > fbdev emulation code, but maybe useful in some other places ... > >> + >> /** >> * drm_panic_register() - Initialize DRM panic for a device >> * @dev: the drm device on which the panic screen will be displayed. >> diff --git a/include/drm/drm_panic.h b/include/drm/drm_panic.h >> index 73bb3f3d9ed9..c3a358dc3e27 100644 >> --- a/include/drm/drm_panic.h >> +++ b/include/drm/drm_panic.h >> @@ -148,11 +148,13 @@ struct drm_scanout_buffer { >> >> #ifdef CONFIG_DRM_PANIC >> >> +bool drm_panic_is_enabled(struct drm_device *dev); > > Since it's internal only, this should be in > drivers/gpu/drm/drm_crtc_internal.h and not int he include for drivers. Yes, that makes sense, drivers won't need that API. > With that: > > Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> > >> void drm_panic_register(struct drm_device *dev); >> void drm_panic_unregister(struct drm_device *dev); > > These two are only used in drm.ko. Can you please move them to > drm_crtc_internal.h too and drop the EXPORT_SYMBOL in a follow-up patch? > We're trying to limit the exported interface and official headers to > really only the pieces drivers actually need. Sure, I'll add this to my next drm_panic series. > > Thanks, Sima > >> >> #else >> >> +bool drm_panic_is_enabled(struct drm_device *dev) {return false; } >> static inline void drm_panic_register(struct drm_device *dev) {} >> static inline void drm_panic_unregister(struct drm_device *dev) {} >> >> -- >> 2.45.2 >> > Best regards,
On 18/07/2024 09:04, Jocelyn Falempe wrote: > > > On 17/07/2024 17:08, Daniel Vetter wrote: >> On Wed, Jul 17, 2024 at 10:48:39AM +0200, Jocelyn Falempe wrote: >>> It allows to check if the drm device supports drm_panic. >>> Prepare the work to have better integration with fbcon and vtconsole. >>> >>> Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com> >>> --- >>> drivers/gpu/drm/drm_panic.c | 20 ++++++++++++++++++++ >>> include/drm/drm_panic.h | 2 ++ >>> 2 files changed, 22 insertions(+) >>> >>> diff --git a/drivers/gpu/drm/drm_panic.c b/drivers/gpu/drm/drm_panic.c >>> index 948aed00595e..d9a25c2d0a65 100644 >>> --- a/drivers/gpu/drm/drm_panic.c >>> +++ b/drivers/gpu/drm/drm_panic.c >>> @@ -703,6 +703,26 @@ static void debugfs_register_plane(struct >>> drm_plane *plane, int index) >>> static void debugfs_register_plane(struct drm_plane *plane, int >>> index) {} >>> #endif /* CONFIG_DRM_PANIC_DEBUG */ >>> +/** >>> + * drm_panic_is_enabled >>> + * @dev: the drm device that may supports drm_panic >>> + * >>> + * returns true if the drm device supports drm_panic >>> + */ >>> +bool drm_panic_is_enabled(struct drm_device *dev) >>> +{ >>> + struct drm_plane *plane; >>> + >>> + if (!dev->mode_config.num_total_plane) >>> + return false; >>> + >>> + drm_for_each_plane(plane, dev) >>> + if (plane->helper_private && >>> plane->helper_private->get_scanout_buffer) >>> + return true; >>> + return false; >>> +} >>> +EXPORT_SYMBOL(drm_panic_is_enabled); >> >> This feels like overkill since you currently only have one user in the >> fbdev emulation code, but maybe useful in some other places ... >> >>> + >>> /** >>> * drm_panic_register() - Initialize DRM panic for a device >>> * @dev: the drm device on which the panic screen will be displayed. >>> diff --git a/include/drm/drm_panic.h b/include/drm/drm_panic.h >>> index 73bb3f3d9ed9..c3a358dc3e27 100644 >>> --- a/include/drm/drm_panic.h >>> +++ b/include/drm/drm_panic.h >>> @@ -148,11 +148,13 @@ struct drm_scanout_buffer { >>> #ifdef CONFIG_DRM_PANIC >>> +bool drm_panic_is_enabled(struct drm_device *dev); >> >> Since it's internal only, this should be in >> drivers/gpu/drm/drm_crtc_internal.h and not int he include for drivers. > > Yes, that makes sense, drivers won't need that API. > >> With that: >> >> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> >> >>> void drm_panic_register(struct drm_device *dev); >>> void drm_panic_unregister(struct drm_device *dev); >> >> These two are only used in drm.ko. Can you please move them to >> drm_crtc_internal.h too and drop the EXPORT_SYMBOL in a follow-up patch? >> We're trying to limit the exported interface and official headers to >> really only the pieces drivers actually need. > > Sure, I'll add this to my next drm_panic series. I think this also applies to drm_panic_init() and drm_panic_exit(), that I introduce in my QR code series: https://patchwork.freedesktop.org/patch/604890/?series=135944&rev=2 I will move them to drm_crtc_internal.h > >> >> Thanks, Sima >> >>> #else >>> +bool drm_panic_is_enabled(struct drm_device *dev) {return false; } >>> static inline void drm_panic_register(struct drm_device *dev) {} >>> static inline void drm_panic_unregister(struct drm_device *dev) {} >>> -- >>> 2.45.2 >>> >> > > Best regards, >
Hi, On Wed, Jul 17, 2024 at 10:48:39AM +0200, Jocelyn Falempe wrote: > It allows to check if the drm device supports drm_panic. > Prepare the work to have better integration with fbcon and vtconsole. > > Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com> > --- > drivers/gpu/drm/drm_panic.c | 20 ++++++++++++++++++++ > include/drm/drm_panic.h | 2 ++ > 2 files changed, 22 insertions(+) > > diff --git a/drivers/gpu/drm/drm_panic.c b/drivers/gpu/drm/drm_panic.c > index 948aed00595e..d9a25c2d0a65 100644 > --- a/drivers/gpu/drm/drm_panic.c > +++ b/drivers/gpu/drm/drm_panic.c > @@ -703,6 +703,26 @@ static void debugfs_register_plane(struct drm_plane *plane, int index) > static void debugfs_register_plane(struct drm_plane *plane, int index) {} > #endif /* CONFIG_DRM_PANIC_DEBUG */ > > +/** > + * drm_panic_is_enabled > + * @dev: the drm device that may supports drm_panic > + * > + * returns true if the drm device supports drm_panic > + */ > +bool drm_panic_is_enabled(struct drm_device *dev) > +{ > + struct drm_plane *plane; > + > + if (!dev->mode_config.num_total_plane) > + return false; > + > + drm_for_each_plane(plane, dev) > + if (plane->helper_private && plane->helper_private->get_scanout_buffer) > + return true; > + return false; > +} > +EXPORT_SYMBOL(drm_panic_is_enabled); > + > /** > * drm_panic_register() - Initialize DRM panic for a device > * @dev: the drm device on which the panic screen will be displayed. > diff --git a/include/drm/drm_panic.h b/include/drm/drm_panic.h > index 73bb3f3d9ed9..c3a358dc3e27 100644 > --- a/include/drm/drm_panic.h > +++ b/include/drm/drm_panic.h > @@ -148,11 +148,13 @@ struct drm_scanout_buffer { > > #ifdef CONFIG_DRM_PANIC > > +bool drm_panic_is_enabled(struct drm_device *dev); > void drm_panic_register(struct drm_device *dev); > void drm_panic_unregister(struct drm_device *dev); > > #else > > +bool drm_panic_is_enabled(struct drm_device *dev) {return false; } This was moved to drivers/gpu/drm/drm_crtc_internal.h in the applied version and I can't find that version on the mailing list; imo this kind of change requires a resend. Also, the above breaks CONFIG_DRM_PANIC=n builds: In file included from drivers/gpu/drm/drm_atomic_uapi.c:43: drivers/gpu/drm/drm_crtc_internal.h:322:6: error: no previous prototype for ‘drm_panic_is_enabled’ [-Werror=missing-prototypes] 322 | bool drm_panic_is_enabled(struct drm_device *dev) {return false; } Stubs like the above must be an inline function. > static inline void drm_panic_register(struct drm_device *dev) {} > static inline void drm_panic_unregister(struct drm_device *dev) {} > > -- > 2.45.2 >
On Thu, Jul 18, 2024 at 11:30:05AM +0200, Jocelyn Falempe wrote: > > > On 18/07/2024 09:04, Jocelyn Falempe wrote: > > > > > > On 17/07/2024 17:08, Daniel Vetter wrote: > > > On Wed, Jul 17, 2024 at 10:48:39AM +0200, Jocelyn Falempe wrote: > > > > It allows to check if the drm device supports drm_panic. > > > > Prepare the work to have better integration with fbcon and vtconsole. > > > > > > > > Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com> > > > > --- > > > > drivers/gpu/drm/drm_panic.c | 20 ++++++++++++++++++++ > > > > include/drm/drm_panic.h | 2 ++ > > > > 2 files changed, 22 insertions(+) > > > > > > > > diff --git a/drivers/gpu/drm/drm_panic.c b/drivers/gpu/drm/drm_panic.c > > > > index 948aed00595e..d9a25c2d0a65 100644 > > > > --- a/drivers/gpu/drm/drm_panic.c > > > > +++ b/drivers/gpu/drm/drm_panic.c > > > > @@ -703,6 +703,26 @@ static void debugfs_register_plane(struct > > > > drm_plane *plane, int index) > > > > static void debugfs_register_plane(struct drm_plane *plane, > > > > int index) {} > > > > #endif /* CONFIG_DRM_PANIC_DEBUG */ > > > > +/** > > > > + * drm_panic_is_enabled > > > > + * @dev: the drm device that may supports drm_panic > > > > + * > > > > + * returns true if the drm device supports drm_panic > > > > + */ > > > > +bool drm_panic_is_enabled(struct drm_device *dev) > > > > +{ > > > > + struct drm_plane *plane; > > > > + > > > > + if (!dev->mode_config.num_total_plane) > > > > + return false; > > > > + > > > > + drm_for_each_plane(plane, dev) > > > > + if (plane->helper_private && > > > > plane->helper_private->get_scanout_buffer) > > > > + return true; > > > > + return false; > > > > +} > > > > +EXPORT_SYMBOL(drm_panic_is_enabled); > > > > > > This feels like overkill since you currently only have one user in the > > > fbdev emulation code, but maybe useful in some other places ... > > > > > > > + > > > > /** > > > > * drm_panic_register() - Initialize DRM panic for a device > > > > * @dev: the drm device on which the panic screen will be displayed. > > > > diff --git a/include/drm/drm_panic.h b/include/drm/drm_panic.h > > > > index 73bb3f3d9ed9..c3a358dc3e27 100644 > > > > --- a/include/drm/drm_panic.h > > > > +++ b/include/drm/drm_panic.h > > > > @@ -148,11 +148,13 @@ struct drm_scanout_buffer { > > > > #ifdef CONFIG_DRM_PANIC > > > > +bool drm_panic_is_enabled(struct drm_device *dev); > > > > > > Since it's internal only, this should be in > > > drivers/gpu/drm/drm_crtc_internal.h and not int he include for drivers. > > > > Yes, that makes sense, drivers won't need that API. > > > > > With that: > > > > > > Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> > > > > > > > void drm_panic_register(struct drm_device *dev); > > > > void drm_panic_unregister(struct drm_device *dev); > > > > > > These two are only used in drm.ko. Can you please move them to > > > drm_crtc_internal.h too and drop the EXPORT_SYMBOL in a follow-up patch? > > > We're trying to limit the exported interface and official headers to > > > really only the pieces drivers actually need. > > > > Sure, I'll add this to my next drm_panic series. > > I think this also applies to drm_panic_init() and drm_panic_exit(), that I > introduce in my QR code series: > https://patchwork.freedesktop.org/patch/604890/?series=135944&rev=2 > I will move them to drm_crtc_internal.h Yup. -Sima > > > > > > > > > Thanks, Sima > > > > > > > #else > > > > +bool drm_panic_is_enabled(struct drm_device *dev) {return false; } > > > > static inline void drm_panic_register(struct drm_device *dev) {} > > > > static inline void drm_panic_unregister(struct drm_device *dev) {} > > > > -- > > > > 2.45.2 > > > > > > > > > > > Best regards, > > >
diff --git a/drivers/gpu/drm/drm_panic.c b/drivers/gpu/drm/drm_panic.c index 948aed00595e..d9a25c2d0a65 100644 --- a/drivers/gpu/drm/drm_panic.c +++ b/drivers/gpu/drm/drm_panic.c @@ -703,6 +703,26 @@ static void debugfs_register_plane(struct drm_plane *plane, int index) static void debugfs_register_plane(struct drm_plane *plane, int index) {} #endif /* CONFIG_DRM_PANIC_DEBUG */ +/** + * drm_panic_is_enabled + * @dev: the drm device that may supports drm_panic + * + * returns true if the drm device supports drm_panic + */ +bool drm_panic_is_enabled(struct drm_device *dev) +{ + struct drm_plane *plane; + + if (!dev->mode_config.num_total_plane) + return false; + + drm_for_each_plane(plane, dev) + if (plane->helper_private && plane->helper_private->get_scanout_buffer) + return true; + return false; +} +EXPORT_SYMBOL(drm_panic_is_enabled); + /** * drm_panic_register() - Initialize DRM panic for a device * @dev: the drm device on which the panic screen will be displayed. diff --git a/include/drm/drm_panic.h b/include/drm/drm_panic.h index 73bb3f3d9ed9..c3a358dc3e27 100644 --- a/include/drm/drm_panic.h +++ b/include/drm/drm_panic.h @@ -148,11 +148,13 @@ struct drm_scanout_buffer { #ifdef CONFIG_DRM_PANIC +bool drm_panic_is_enabled(struct drm_device *dev); void drm_panic_register(struct drm_device *dev); void drm_panic_unregister(struct drm_device *dev); #else +bool drm_panic_is_enabled(struct drm_device *dev) {return false; } static inline void drm_panic_register(struct drm_device *dev) {} static inline void drm_panic_unregister(struct drm_device *dev) {}
It allows to check if the drm device supports drm_panic. Prepare the work to have better integration with fbcon and vtconsole. Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com> --- drivers/gpu/drm/drm_panic.c | 20 ++++++++++++++++++++ include/drm/drm_panic.h | 2 ++ 2 files changed, 22 insertions(+)