[PATCH v2] drm: use ida to allocate connector ids
Rob Clark
robdclark at gmail.com
Tue Aug 6 17:40:01 PDT 2013
On Tue, Aug 6, 2013 at 8:12 PM, Dave Airlie <airlied at gmail.com> wrote:
> On Tue, Jul 30, 2013 at 5:51 PM, Ilia Mirkin <imirkin at alum.mit.edu> wrote:
>> This makes it so that reloading a module does not cause all the
>> connector ids to change, which are user-visible and sometimes used
>> for configuration.
>
> I like this, anyone else want to comment/review?
looks nice.. not sure I actually want to *encourage* someone to rely
on stable connector id's (since it can change from kernel version to
kernel version, etc), but otoh it would make life nicer for modetest
users (since it isn't clever enough to use connector-names)
BR,
-R
> Dave.
>
>>
>> Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
>> ---
>>
>> v1 -> v2: correct loop condition... not sure how that slipped past
>> me... the code started out by being <= DRM...VIRTUAL, I guess
>>
>> drivers/gpu/drm/drm_crtc.c | 61 +++++++++++++++++++++++++++++++---------------
>> drivers/gpu/drm/drm_drv.c | 2 ++
>> include/drm/drm_crtc.h | 2 ++
>> 3 files changed, 46 insertions(+), 19 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
>> index fc83bb9..ed7599a 100644
>> --- a/drivers/gpu/drm/drm_crtc.c
>> +++ b/drivers/gpu/drm/drm_crtc.c
>> @@ -186,29 +186,29 @@ static const struct drm_prop_enum_list drm_dirty_info_enum_list[] = {
>> struct drm_conn_prop_enum_list {
>> int type;
>> const char *name;
>> - int count;
>> + struct ida count;
>> };
>>
>> /*
>> * Connector and encoder types.
>> */
>> static struct drm_conn_prop_enum_list drm_connector_enum_list[] =
>> -{ { DRM_MODE_CONNECTOR_Unknown, "Unknown", 0 },
>> - { DRM_MODE_CONNECTOR_VGA, "VGA", 0 },
>> - { DRM_MODE_CONNECTOR_DVII, "DVI-I", 0 },
>> - { DRM_MODE_CONNECTOR_DVID, "DVI-D", 0 },
>> - { DRM_MODE_CONNECTOR_DVIA, "DVI-A", 0 },
>> - { DRM_MODE_CONNECTOR_Composite, "Composite", 0 },
>> - { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO", 0 },
>> - { DRM_MODE_CONNECTOR_LVDS, "LVDS", 0 },
>> - { DRM_MODE_CONNECTOR_Component, "Component", 0 },
>> - { DRM_MODE_CONNECTOR_9PinDIN, "DIN", 0 },
>> - { DRM_MODE_CONNECTOR_DisplayPort, "DP", 0 },
>> - { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A", 0 },
>> - { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B", 0 },
>> - { DRM_MODE_CONNECTOR_TV, "TV", 0 },
>> - { DRM_MODE_CONNECTOR_eDP, "eDP", 0 },
>> - { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual", 0},
>> +{ { DRM_MODE_CONNECTOR_Unknown, "Unknown" },
>> + { DRM_MODE_CONNECTOR_VGA, "VGA" },
>> + { DRM_MODE_CONNECTOR_DVII, "DVI-I" },
>> + { DRM_MODE_CONNECTOR_DVID, "DVI-D" },
>> + { DRM_MODE_CONNECTOR_DVIA, "DVI-A" },
>> + { DRM_MODE_CONNECTOR_Composite, "Composite" },
>> + { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" },
>> + { DRM_MODE_CONNECTOR_LVDS, "LVDS" },
>> + { DRM_MODE_CONNECTOR_Component, "Component" },
>> + { DRM_MODE_CONNECTOR_9PinDIN, "DIN" },
>> + { DRM_MODE_CONNECTOR_DisplayPort, "DP" },
>> + { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" },
>> + { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" },
>> + { DRM_MODE_CONNECTOR_TV, "TV" },
>> + { DRM_MODE_CONNECTOR_eDP, "eDP" },
>> + { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" },
>> };
>>
>> static const struct drm_prop_enum_list drm_encoder_enum_list[] =
>> @@ -220,6 +220,22 @@ static const struct drm_prop_enum_list drm_encoder_enum_list[] =
>> { DRM_MODE_ENCODER_VIRTUAL, "Virtual" },
>> };
>>
>> +void drm_connector_ida_init(void)
>> +{
>> + int i;
>> +
>> + for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
>> + ida_init(&drm_connector_enum_list[i].count);
>> +}
>> +
>> +void drm_connector_ida_destroy(void)
>> +{
>> + int i;
>> +
>> + for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
>> + ida_destroy(&drm_connector_enum_list[i].count);
>> +}
>> +
>> const char *drm_get_encoder_name(const struct drm_encoder *encoder)
>> {
>> static char buf[32];
>> @@ -711,6 +727,9 @@ int drm_connector_init(struct drm_device *dev,
>> int connector_type)
>> {
>> int ret;
>> + struct ida *count = &drm_connector_enum_list[connector_type].count;
>> +
>> + ida_pre_get(count, GFP_KERNEL);
>>
>> drm_modeset_lock_all(dev);
>>
>> @@ -722,8 +741,9 @@ int drm_connector_init(struct drm_device *dev,
>> connector->dev = dev;
>> connector->funcs = funcs;
>> connector->connector_type = connector_type;
>> - connector->connector_type_id =
>> - ++drm_connector_enum_list[connector_type].count; /* TODO */
>> + ret = ida_get_new_above(count, 1, &connector->connector_type_id);
>> + if (ret)
>> + goto out;
>> INIT_LIST_HEAD(&connector->probed_modes);
>> INIT_LIST_HEAD(&connector->modes);
>> connector->edid_blob_ptr = NULL;
>> @@ -764,6 +784,9 @@ void drm_connector_cleanup(struct drm_connector *connector)
>> list_for_each_entry_safe(mode, t, &connector->modes, head)
>> drm_mode_remove(connector, mode);
>>
>> + ida_remove(&drm_connector_enum_list[connector->connector_type].count,
>> + connector->connector_type_id);
>> +
>> drm_mode_object_put(dev, &connector->base);
>> list_del(&connector->head);
>> dev->mode_config.num_connector--;
>> diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
>> index 99fcd7c..00597a1 100644
>> --- a/drivers/gpu/drm/drm_drv.c
>> +++ b/drivers/gpu/drm/drm_drv.c
>> @@ -251,6 +251,7 @@ static int __init drm_core_init(void)
>> int ret = -ENOMEM;
>>
>> drm_global_init();
>> + drm_connector_ida_init();
>> idr_init(&drm_minors_idr);
>>
>> if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops))
>> @@ -298,6 +299,7 @@ static void __exit drm_core_exit(void)
>>
>> unregister_chrdev(DRM_MAJOR, "drm");
>>
>> + drm_connector_ida_destroy();
>> idr_destroy(&drm_minors_idr);
>> }
>>
>> diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
>> index fa12a2f..effee9d 100644
>> --- a/include/drm/drm_crtc.h
>> +++ b/include/drm/drm_crtc.h
>> @@ -869,6 +869,8 @@ extern int drm_crtc_init(struct drm_device *dev,
>> const struct drm_crtc_funcs *funcs);
>> extern void drm_crtc_cleanup(struct drm_crtc *crtc);
>>
>> +extern void drm_connector_ida_init(void);
>> +extern void drm_connector_ida_destroy(void);
>> extern int drm_connector_init(struct drm_device *dev,
>> struct drm_connector *connector,
>> const struct drm_connector_funcs *funcs,
>> --
>> 1.8.1.5
>>
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