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drm/atomic: Allow for holes in connector state, v2.

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Because we record connector_mask using 1 << drm_connector_index now
the connector_mask should stay the same even when other connectors
are removed. This was not the case with MST, in that case when removing
a connector all other connectors may change their index.

This is fixed by waiting until the first get_connector_state to allocate
connector_state, and force reallocation when state is too small.

As a side effect connector arrays no longer have to be preallocated,
and can be allocated on first use which means a less allocations in
the page flip only path.

Changes since v1:
- Whitespace. (Ville)
- Call ida_remove when destroying the connector. (Ville)
- u32 alloc -> int. (Ville)

Fixes: 14de6c44d1 ("drm/atomic: Remove drm_atomic_connectors_for_crtc.")
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Lyude <cpaul@redhat.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Maarten Lankhorst 2016-02-17 08:32:05 +01:00 • committed by Dave Airlie
commit 5fff80bbdb
4 changed files with 48 additions and 55 deletions
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8
include/drm/drm_crtc.h
View file

@ -1166,6 +1166,7 @@ struct drm_connector {
struct drm_mode_object base;
char *name;
int connector_id;
int connector_type;
int connector_type_id;
bool interlace_allowed;
@ -2047,6 +2048,7 @@ struct drm_mode_config {
struct list_head fb_list;
int num_connector;
struct ida connector_ida;
struct list_head connector_list;
int num_encoder;
struct list_head encoder_list;
@ -2200,7 +2202,11 @@ int drm_connector_register(struct drm_connector *connector);
void drm_connector_unregister(struct drm_connector *connector);
extern void drm_connector_cleanup(struct drm_connector *connector);
extern unsigned int drm_connector_index(struct drm_connector *connector);
static inline unsigned drm_connector_index(struct drm_connector *connector)
{
return connector->connector_id;
}
/* helper to unplug all connectors from sysfs for device */
extern void drm_connector_unplug_all(struct drm_device *dev);