Re: [Intel-gfx] [PATCH 2/3] drm: Create a drm_connector_helper_funcs hook for Adaptive Sync support
On Thu, Mar 19, 2020 at 12:07:37PM +0200, Jani Nikula wrote: > On Tue, 17 Mar 2020, Manasi Navare wrote: > > This patch adds a hook in drm_connector_helper_funcs to get the > > support of the driver for adaptive sync functionality. > > > > This can be called in the connector probe helper function after > > the connector detect() and get_modes() hooks to also > > query the adaptive sync support of the driver. > > I can obviously see that from the patch. But this does not explain at > all *why* we need another hook to begin with, and why it neeeds to be > called from ->fill_modes that is set to > drm_helper_probe_single_connector_modes(). > This needs to be called after get_modes that ends up populating the monitor range after parsing the EDID. I could have just modified the get_modes hook in the driver to set the vrr capabilities but that doesnt go with the definition of get_modes() hook which is purely to obtain modes from edid. So i added a separate hook which will always return the vrr capabilities if this hook exists in the driver everytime a connector probe happens. Would you suggest this elsewhere or some other design? I am open to better placement of this hook or reusing some other hook or other suggestions for getting the vrr capabilities in the driver Manasi > > Cc: Jani Nikula > > Cc: Ville Syrjälä > > Cc: Harry Wentland > > Cc: Nicholas Kazlauskas > > Signed-off-by: Manasi Navare > > --- > > drivers/gpu/drm/drm_probe_helper.c | 4 > > include/drm/drm_modeset_helper_vtables.h | 16 > > 2 files changed, 20 insertions(+) > > > > diff --git a/drivers/gpu/drm/drm_probe_helper.c > > b/drivers/gpu/drm/drm_probe_helper.c > > index 576b4b7dcd89..4403817bfb02 100644 > > --- a/drivers/gpu/drm/drm_probe_helper.c > > +++ b/drivers/gpu/drm/drm_probe_helper.c > > @@ -482,6 +482,10 @@ int drm_helper_probe_single_connector_modes(struct > > drm_connector *connector, > > > > count = (*connector_funcs->get_modes)(connector); > > > > + /* Get the Adaptive Sync Support if helper exists */ > > + if (*connector_funcs->get_adaptive_sync_support) > > + (**connector_funcs->get_adaptive_sync_support)(connector); > > + > > This is in the middle of a sequence figuring out the modes. First > ->get_modes, then fallback to other mechanisms. Certainly we don't want > to do something else in the middle. > > > /* > > * Fallback for when DDC probe failed in drm_get_edid() and thus skipped > > * override/firmware EDID. > > diff --git a/include/drm/drm_modeset_helper_vtables.h > > b/include/drm/drm_modeset_helper_vtables.h > > index 7c20b1c8b6a7..0b203fdd25df 100644 > > --- a/include/drm/drm_modeset_helper_vtables.h > > +++ b/include/drm/drm_modeset_helper_vtables.h > > @@ -1079,6 +1079,22 @@ struct drm_connector_helper_funcs { > > struct drm_writeback_job *job); > > void (*cleanup_writeback_job)(struct drm_writeback_connector *connector, > > struct drm_writeback_job *job); > > + > > + /** > > +* @get_adaptive_sync_support: > > +* > > +* This hook is used by the probe helper to get the driver's support > > +* for adaptive sync or variable refresh rate. > > +* This is called from drm_helper_probe_single_connector_modes() > > +* This is called after the @get_modes hook so that the connector modes > > +* are already obtained and EDID is parsed to obtain the monitor > > +* range descriptor information. > > +* > > +* This hook is optional and defined only for the drivers and on > > +* connectors that advertise adaptive sync support. > > +* > > +*/ > > + void (*get_adaptive_sync_support)(struct drm_connector *connector); > > }; > > > > /** > > -- > Jani Nikula, Intel Open Source Graphics Center ___ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
Re: [Intel-gfx] [PATCH 2/3] drm: Create a drm_connector_helper_funcs hook for Adaptive Sync support
On Tue, 17 Mar 2020, Manasi Navare wrote: > This patch adds a hook in drm_connector_helper_funcs to get the > support of the driver for adaptive sync functionality. > > This can be called in the connector probe helper function after > the connector detect() and get_modes() hooks to also > query the adaptive sync support of the driver. I can obviously see that from the patch. But this does not explain at all *why* we need another hook to begin with, and why it neeeds to be called from ->fill_modes that is set to drm_helper_probe_single_connector_modes(). > Cc: Jani Nikula > Cc: Ville Syrjälä > Cc: Harry Wentland > Cc: Nicholas Kazlauskas > Signed-off-by: Manasi Navare > --- > drivers/gpu/drm/drm_probe_helper.c | 4 > include/drm/drm_modeset_helper_vtables.h | 16 > 2 files changed, 20 insertions(+) > > diff --git a/drivers/gpu/drm/drm_probe_helper.c > b/drivers/gpu/drm/drm_probe_helper.c > index 576b4b7dcd89..4403817bfb02 100644 > --- a/drivers/gpu/drm/drm_probe_helper.c > +++ b/drivers/gpu/drm/drm_probe_helper.c > @@ -482,6 +482,10 @@ int drm_helper_probe_single_connector_modes(struct > drm_connector *connector, > > count = (*connector_funcs->get_modes)(connector); > > + /* Get the Adaptive Sync Support if helper exists */ > + if (*connector_funcs->get_adaptive_sync_support) > + (**connector_funcs->get_adaptive_sync_support)(connector); > + This is in the middle of a sequence figuring out the modes. First ->get_modes, then fallback to other mechanisms. Certainly we don't want to do something else in the middle. > /* >* Fallback for when DDC probe failed in drm_get_edid() and thus skipped >* override/firmware EDID. > diff --git a/include/drm/drm_modeset_helper_vtables.h > b/include/drm/drm_modeset_helper_vtables.h > index 7c20b1c8b6a7..0b203fdd25df 100644 > --- a/include/drm/drm_modeset_helper_vtables.h > +++ b/include/drm/drm_modeset_helper_vtables.h > @@ -1079,6 +1079,22 @@ struct drm_connector_helper_funcs { >struct drm_writeback_job *job); > void (*cleanup_writeback_job)(struct drm_writeback_connector *connector, > struct drm_writeback_job *job); > + > + /** > + * @get_adaptive_sync_support: > + * > + * This hook is used by the probe helper to get the driver's support > + * for adaptive sync or variable refresh rate. > + * This is called from drm_helper_probe_single_connector_modes() > + * This is called after the @get_modes hook so that the connector modes > + * are already obtained and EDID is parsed to obtain the monitor > + * range descriptor information. > + * > + * This hook is optional and defined only for the drivers and on > + * connectors that advertise adaptive sync support. > + * > + */ > + void (*get_adaptive_sync_support)(struct drm_connector *connector); > }; > > /** -- Jani Nikula, Intel Open Source Graphics Center ___ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
Re: [Intel-gfx] [PATCH 2/3] drm: Create a drm_connector_helper_funcs hook for Adaptive Sync support
On 2020-03-18 2:35 a.m., Manasi Navare wrote: > This patch adds a hook in drm_connector_helper_funcs to get the > support of the driver for adaptive sync functionality. > > This can be called in the connector probe helper function after > the connector detect() and get_modes() hooks to also > query the adaptive sync support of the driver. > > Cc: Jani Nikula > Cc: Ville Syrjälä > Cc: Harry Wentland > Cc: Nicholas Kazlauskas > Signed-off-by: Manasi Navare Patches 1 and 2 are Reviewed-by: Harry Wentland Harry > --- > drivers/gpu/drm/drm_probe_helper.c | 4 > include/drm/drm_modeset_helper_vtables.h | 16 > 2 files changed, 20 insertions(+) > > diff --git a/drivers/gpu/drm/drm_probe_helper.c > b/drivers/gpu/drm/drm_probe_helper.c > index 576b4b7dcd89..4403817bfb02 100644 > --- a/drivers/gpu/drm/drm_probe_helper.c > +++ b/drivers/gpu/drm/drm_probe_helper.c > @@ -482,6 +482,10 @@ int drm_helper_probe_single_connector_modes(struct > drm_connector *connector, > > count = (*connector_funcs->get_modes)(connector); > > + /* Get the Adaptive Sync Support if helper exists */ > + if (*connector_funcs->get_adaptive_sync_support) > + (**connector_funcs->get_adaptive_sync_support)(connector); > + > /* >* Fallback for when DDC probe failed in drm_get_edid() and thus skipped >* override/firmware EDID. > diff --git a/include/drm/drm_modeset_helper_vtables.h > b/include/drm/drm_modeset_helper_vtables.h > index 7c20b1c8b6a7..0b203fdd25df 100644 > --- a/include/drm/drm_modeset_helper_vtables.h > +++ b/include/drm/drm_modeset_helper_vtables.h > @@ -1079,6 +1079,22 @@ struct drm_connector_helper_funcs { >struct drm_writeback_job *job); > void (*cleanup_writeback_job)(struct drm_writeback_connector *connector, > struct drm_writeback_job *job); > + > + /** > + * @get_adaptive_sync_support: > + * > + * This hook is used by the probe helper to get the driver's support > + * for adaptive sync or variable refresh rate. > + * This is called from drm_helper_probe_single_connector_modes() > + * This is called after the @get_modes hook so that the connector modes > + * are already obtained and EDID is parsed to obtain the monitor > + * range descriptor information. > + * > + * This hook is optional and defined only for the drivers and on > + * connectors that advertise adaptive sync support. > + * > + */ > + void (*get_adaptive_sync_support)(struct drm_connector *connector); > }; > > /** > ___ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
[Intel-gfx] [PATCH 2/3] drm: Create a drm_connector_helper_funcs hook for Adaptive Sync support
This patch adds a hook in drm_connector_helper_funcs to get the support of the driver for adaptive sync functionality. This can be called in the connector probe helper function after the connector detect() and get_modes() hooks to also query the adaptive sync support of the driver. Cc: Jani Nikula Cc: Ville Syrjälä Cc: Harry Wentland Cc: Nicholas Kazlauskas Signed-off-by: Manasi Navare --- drivers/gpu/drm/drm_probe_helper.c | 4 include/drm/drm_modeset_helper_vtables.h | 16 2 files changed, 20 insertions(+) diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c index 576b4b7dcd89..4403817bfb02 100644 --- a/drivers/gpu/drm/drm_probe_helper.c +++ b/drivers/gpu/drm/drm_probe_helper.c @@ -482,6 +482,10 @@ int drm_helper_probe_single_connector_modes(struct drm_connector *connector, count = (*connector_funcs->get_modes)(connector); + /* Get the Adaptive Sync Support if helper exists */ + if (*connector_funcs->get_adaptive_sync_support) + (**connector_funcs->get_adaptive_sync_support)(connector); + /* * Fallback for when DDC probe failed in drm_get_edid() and thus skipped * override/firmware EDID. diff --git a/include/drm/drm_modeset_helper_vtables.h b/include/drm/drm_modeset_helper_vtables.h index 7c20b1c8b6a7..0b203fdd25df 100644 --- a/include/drm/drm_modeset_helper_vtables.h +++ b/include/drm/drm_modeset_helper_vtables.h @@ -1079,6 +1079,22 @@ struct drm_connector_helper_funcs { struct drm_writeback_job *job); void (*cleanup_writeback_job)(struct drm_writeback_connector *connector, struct drm_writeback_job *job); + + /** +* @get_adaptive_sync_support: +* +* This hook is used by the probe helper to get the driver's support +* for adaptive sync or variable refresh rate. +* This is called from drm_helper_probe_single_connector_modes() +* This is called after the @get_modes hook so that the connector modes +* are already obtained and EDID is parsed to obtain the monitor +* range descriptor information. +* +* This hook is optional and defined only for the drivers and on +* connectors that advertise adaptive sync support. +* +*/ + void (*get_adaptive_sync_support)(struct drm_connector *connector); }; /** -- 2.19.1 ___ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx