[PATCH 3/5] drm: add CRTC properties
Daniel Vetter
daniel at ffwll.ch
Tue Mar 20 08:48:00 PDT 2012
On Tue, Mar 20, 2012 at 11:09:42AM -0400, Alex Deucher wrote:
> On Tue, Mar 20, 2012 at 10:48 AM, Paulo Zanoni <przanoni at gmail.com> wrote:
> > From: Paulo Zanoni <paulo.r.zanoni at intel.com>
> >
> > Code based on the connector properties code.
> >
> > Two new ioctls:
> > - DRM_IOCTL_MODE_CRTC_GETPROPERTIES
> > - DRM_IOCTL_MODE_CRTC_SETPROPERTY
> >
> > The i915 driver needs this for the rotation and overscan compensation
> > properties. Other drivers might need this too.
> >
> > v2: replace BUG_ON() for WARN(), fix bugs, add functions to get/set
> > the value
> >
>
> Is there any reason why these can't just be exposed as connector
> properties? While the hw features you are exposing are technically
> part of the crtc block, so are most of the existing connector
> properties (scalers, etc.). Plus, while the scalers/transforms are
> part of the crtc hw, they only really make sense on certain
> connectors. E.g., underscan isn't particularly useful on non-TMDS
> capable connectors.
The reasons for this pretty much boil down to that we have quite a few
properties that belong to the crtc. Currently we abuse connector
properties for that because no one uses cloning, but imo that's not a
Great Idea. Other examples than rotation are blending/Z-order when using
planes, special options for color conversion (probably only on planes),
...
-Daniel
>
> Alex
>
>
> > Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
> > ---
> > drivers/gpu/drm/drm_crtc.c | 150 ++++++++++++++++++++++++++++++++++++++++++++
> > drivers/gpu/drm/drm_drv.c | 4 +-
> > include/drm/drm.h | 2 +
> > include/drm/drm_crtc.h | 28 ++++++++-
> > include/drm/drm_mode.h | 13 ++++
> > 5 files changed, 195 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
> > index 6260fc3..df00c29 100644
> > --- a/drivers/gpu/drm/drm_crtc.c
> > +++ b/drivers/gpu/drm/drm_crtc.c
> > @@ -2712,6 +2712,55 @@ int drm_connector_property_get_value(struct drm_connector *connector,
> > }
> > EXPORT_SYMBOL(drm_connector_property_get_value);
> >
> > +void drm_crtc_attach_property(struct drm_crtc *crtc,
> > + struct drm_property *property, uint64_t init_val)
> > +{
> > + int i;
> > +
> > + for (i = 0; i < DRM_CRTC_MAX_PROPERTY; i++) {
> > + if (crtc->property_ids[i] == 0) {
> > + crtc->property_ids[i] = property->base.id;
> > + crtc->property_values[i] = init_val;
> > + return;
> > + }
> > + }
> > +
> > + WARN(1, "Failed to attach crtc property\n");
> > +}
> > +EXPORT_SYMBOL(drm_crtc_attach_property);
> > +
> > +int drm_crtc_property_set_value(struct drm_crtc *crtc,
> > + struct drm_property *property, uint64_t value)
> > +{
> > + int i;
> > +
> > + for (i = 0; i < DRM_CRTC_MAX_PROPERTY; i++) {
> > + if (crtc->property_ids[i] == property->base.id) {
> > + crtc->property_values[i] = value;
> > + return 0;
> > + }
> > + }
> > +
> > + return -EINVAL;
> > +}
> > +EXPORT_SYMBOL(drm_crtc_property_set_value);
> > +
> > +int drm_crtc_property_get_value(struct drm_crtc *crtc,
> > + struct drm_property *property, uint64_t *val)
> > +{
> > + int i;
> > +
> > + for (i = 0; i < DRM_CRTC_MAX_PROPERTY; i++) {
> > + if (crtc->property_ids[i] == property->base.id) {
> > + *val = crtc->property_values[i];
> > + return 0;
> > + }
> > + }
> > +
> > + return -EINVAL;
> > +}
> > +EXPORT_SYMBOL(drm_crtc_property_get_value);
> > +
> > int drm_mode_getproperty_ioctl(struct drm_device *dev,
> > void *data, struct drm_file *file_priv)
> > {
> > @@ -2983,6 +3032,107 @@ out:
> > return ret;
> > }
> >
> > +int drm_mode_crtc_get_properties_ioctl(struct drm_device *dev, void *data,
> > + struct drm_file *file_priv)
> > +{
> > + struct drm_mode_crtc_get_properties *arg = data;
> > + struct drm_mode_object *obj;
> > + struct drm_crtc *crtc;
> > + int ret = 0;
> > + int i;
> > + int copied = 0;
> > + int props_count = 0;
> > + uint32_t __user *props_ptr;
> > + uint64_t __user *prop_values_ptr;
> > +
> > + if (!drm_core_check_feature(dev, DRIVER_MODESET))
> > + return -EINVAL;
> > +
> > + mutex_lock(&dev->mode_config.mutex);
> > +
> > + obj = drm_mode_object_find(dev, arg->crtc_id, DRM_MODE_OBJECT_CRTC);
> > + if (!obj) {
> > + ret = -EINVAL;
> > + goto out;
> > + }
> > + crtc = obj_to_crtc(obj);
> > +
> > + for (props_count = 0; props_count < DRM_CRTC_MAX_PROPERTY &&
> > + crtc->property_ids[props_count] != 0; props_count++)
> > + ;
> > +
> > + /* This ioctl is called twice, once to determine how much space is
> > + * needed, and the 2nd time to fill it. */
> > + if ((arg->count_props >= props_count) && props_count) {
> > + copied = 0;
> > + props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr);
> > + prop_values_ptr = (uint64_t __user *)(unsigned long)
> > + (arg->prop_values_ptr);
> > + for (i = 0; i < props_count; i++) {
> > + if (put_user(crtc->property_ids[i],
> > + props_ptr + copied)) {
> > + ret = -EFAULT;
> > + goto out;
> > + }
> > + if (put_user(crtc->property_values[i],
> > + prop_values_ptr + copied)) {
> > + ret = -EFAULT;
> > + goto out;
> > + }
> > + copied++;
> > + }
> > + }
> > + arg->count_props = props_count;
> > +out:
> > + mutex_unlock(&dev->mode_config.mutex);
> > + return ret;
> > +}
> > +
> > +int drm_mode_crtc_set_property_ioctl(struct drm_device *dev, void *data,
> > + struct drm_file *file_priv)
> > +{
> > + struct drm_mode_crtc_set_property *arg = data;
> > + struct drm_mode_object *obj;
> > + struct drm_property *property;
> > + struct drm_crtc *crtc;
> > + int ret = -EINVAL;
> > + int i;
> > +
> > + if (!drm_core_check_feature(dev, DRIVER_MODESET))
> > + return -EINVAL;
> > +
> > + mutex_lock(&dev->mode_config.mutex);
> > +
> > + obj = drm_mode_object_find(dev, arg->crtc_id, DRM_MODE_OBJECT_CRTC);
> > + if (!obj)
> > + goto out;
> > + crtc = obj_to_crtc(obj);
> > +
> > + for (i = 0; i < DRM_CRTC_MAX_PROPERTY; i++)
> > + if (crtc->property_ids[i] == arg->prop_id)
> > + break;
> > +
> > + if (i == DRM_CRTC_MAX_PROPERTY)
> > + goto out;
> > +
> > + obj = drm_mode_object_find(dev, arg->prop_id, DRM_MODE_OBJECT_PROPERTY);
> > + if (!obj)
> > + goto out;
> > + property = obj_to_property(obj);
> > +
> > + if (!drm_property_change_is_valid(property, arg->value))
> > + goto out;
> > +
> > + if (crtc->funcs->set_property)
> > + ret = crtc->funcs->set_property(crtc, property, arg->value);
> > + if (!ret) {
> > + crtc->property_values[i] = arg->value;
> > + }
> > +out:
> > + mutex_unlock(&dev->mode_config.mutex);
> > + return ret;
> > +}
> > +
> > int drm_mode_connector_attach_encoder(struct drm_connector *connector,
> > struct drm_encoder *encoder)
> > {
> > diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
> > index d166bd0..815e3a9 100644
> > --- a/drivers/gpu/drm/drm_drv.c
> > +++ b/drivers/gpu/drm/drm_drv.c
> > @@ -159,7 +159,9 @@ static struct drm_ioctl_desc drm_ioctls[] = {
> > DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
> > DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
> > DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
> > - DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED)
> > + DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
> > + DRM_IOCTL_DEF(DRM_IOCTL_MODE_CRTC_GETPROPERTIES, drm_mode_crtc_get_properties_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
> > + DRM_IOCTL_DEF(DRM_IOCTL_MODE_CRTC_SETPROPERTY, drm_mode_crtc_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED)
> > };
> >
> > #define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls )
> > diff --git a/include/drm/drm.h b/include/drm/drm.h
> > index 34a7b89..a397a93 100644
> > --- a/include/drm/drm.h
> > +++ b/include/drm/drm.h
> > @@ -718,6 +718,8 @@ struct drm_get_cap {
> > #define DRM_IOCTL_MODE_GETPLANE DRM_IOWR(0xB6, struct drm_mode_get_plane)
> > #define DRM_IOCTL_MODE_SETPLANE DRM_IOWR(0xB7, struct drm_mode_set_plane)
> > #define DRM_IOCTL_MODE_ADDFB2 DRM_IOWR(0xB8, struct drm_mode_fb_cmd2)
> > +#define DRM_IOCTL_MODE_CRTC_GETPROPERTIES DRM_IOWR(0xB9, struct drm_mode_crtc_get_properties)
> > +#define DRM_IOCTL_MODE_CRTC_SETPROPERTY DRM_IOWR(0xBA, struct drm_mode_crtc_set_property)
> >
> > /**
> > * Device specific ioctls should only be in their respective headers
> > diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
> > index 21681fe..a2d660d 100644
> > --- a/include/drm/drm_crtc.h
> > +++ b/include/drm/drm_crtc.h
> > @@ -283,6 +283,8 @@ struct drm_encoder;
> > struct drm_pending_vblank_event;
> > struct drm_plane;
> >
> > +#define DRM_CRTC_MAX_PROPERTY 16
> > +
> > /**
> > * drm_crtc_funcs - control CRTCs for a given device
> > * @reset: reset CRTC after state has been invalidate (e.g. resume)
> > @@ -297,7 +299,8 @@ struct drm_plane;
> > * @mode_fixup: fixup proposed mode
> > * @mode_set: set the desired mode on the CRTC
> > * @gamma_set: specify color ramp for CRTC
> > - * @destroy: deinit and free object.
> > + * @destroy: deinit and free object
> > + * @set_property: called when a property is changed
> > *
> > * The drm_crtc_funcs structure is the central CRTC management structure
> > * in the DRM. Each CRTC controls one or more connectors (note that the name
> > @@ -341,6 +344,9 @@ struct drm_crtc_funcs {
> > int (*page_flip)(struct drm_crtc *crtc,
> > struct drm_framebuffer *fb,
> > struct drm_pending_vblank_event *event);
> > +
> > + int (*set_property)(struct drm_crtc *crtc,
> > + struct drm_property *property, uint64_t val);
> > };
> >
> > /**
> > @@ -360,6 +366,8 @@ struct drm_crtc_funcs {
> > * @framedur_ns: precise line timing
> > * @pixeldur_ns: precise pixel timing
> > * @helper_private: mid-layer private data
> > + * @property_ids: property tracking for this CRTC
> > + * @property_values: property values
> > *
> > * Each CRTC may have one or more connectors associated with it. This structure
> > * allows the CRTC to be controlled.
> > @@ -395,6 +403,9 @@ struct drm_crtc {
> >
> > /* if you are using the helper */
> > void *helper_private;
> > +
> > + u32 property_ids[DRM_CRTC_MAX_PROPERTY];
> > + uint64_t property_values[DRM_CRTC_MAX_PROPERTY];
> > };
> >
> >
> > @@ -895,6 +906,12 @@ extern int drm_connector_property_set_value(struct drm_connector *connector,
> > extern int drm_connector_property_get_value(struct drm_connector *connector,
> > struct drm_property *property,
> > uint64_t *value);
> > +extern int drm_crtc_property_set_value(struct drm_crtc *crtc,
> > + struct drm_property *property,
> > + uint64_t value);
> > +extern int drm_crtc_property_get_value(struct drm_crtc *crtc,
> > + struct drm_property *property,
> > + uint64_t *value);
> > extern struct drm_display_mode *drm_crtc_mode_create(struct drm_device *dev);
> > extern void drm_framebuffer_set_object(struct drm_device *dev,
> > unsigned long handle);
> > @@ -909,6 +926,9 @@ extern bool drm_crtc_in_use(struct drm_crtc *crtc);
> >
> > extern void drm_connector_attach_property(struct drm_connector *connector,
> > struct drm_property *property, uint64_t init_val);
> > +extern void drm_crtc_attach_property(struct drm_crtc *crtc,
> > + struct drm_property *property,
> > + uint64_t init_val);
> > extern struct drm_property *drm_property_create(struct drm_device *dev, int flags,
> > const char *name, int num_values);
> > extern struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags,
> > @@ -1019,6 +1039,12 @@ extern int drm_mode_mmap_dumb_ioctl(struct drm_device *dev,
> > void *data, struct drm_file *file_priv);
> > extern int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,
> > void *data, struct drm_file *file_priv);
> > +extern int drm_mode_crtc_get_properties_ioctl(struct drm_device *dev,
> > + void *data,
> > + struct drm_file *file_priv);
> > +extern int drm_mode_crtc_set_property_ioctl(struct drm_device *dev,
> > + void *data,
> > + struct drm_file *file_priv);
> >
> > extern void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth,
> > int *bpp);
> > diff --git a/include/drm/drm_mode.h b/include/drm/drm_mode.h
> > index 2a2acda..890b930 100644
> > --- a/include/drm/drm_mode.h
> > +++ b/include/drm/drm_mode.h
> > @@ -252,6 +252,19 @@ struct drm_mode_connector_set_property {
> > __u32 connector_id;
> > };
> >
> > +struct drm_mode_crtc_get_properties {
> > + __u64 props_ptr;
> > + __u64 prop_values_ptr;
> > + __u32 count_props;
> > + __u32 crtc_id;
> > +};
> > +
> > +struct drm_mode_crtc_set_property {
> > + __u64 value;
> > + __u32 prop_id;
> > + __u32 crtc_id;
> > +};
> > +
> > struct drm_mode_get_blob {
> > __u32 blob_id;
> > __u32 length;
> > --
> > 1.7.9.1
> >
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--
Daniel Vetter
Mail: daniel at ffwll.ch
Mobile: +41 (0)79 365 57 48
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