diff options
| author | Jani Nikula <jani.nikula@intel.com> | 2024-05-10 18:08:12 +0300 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2024-05-23 14:37:24 +0300 |
| commit | adcea136b4e865b11cf414321e397d872558e767 (patch) | |
| tree | 4666817934701da0fff9f4a8be6af7a3cb0b3359 /drivers/gpu/drm/drm_edid.c | |
| parent | 42505ab1201918585b2627b171b064193a815c0d (diff) | |
drm/edid: add a helper for EDID sysfs property show
Add a helper to get the EDID property for sysfs property show. This
hides all the edid_blob_ptr usage within drm_edid.c.
Reviewed-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/902c8e09d25b99391fd9c92d95af07c01d7b7cbd.1715353572.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Diffstat (limited to 'drivers/gpu/drm/drm_edid.c')
| -rw-r--r-- | drivers/gpu/drm/drm_edid.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 0f7c4c5b14b9..f68a41eeb1fa 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -6941,6 +6941,39 @@ out: return ret; } +/* For sysfs edid show implementation */ +ssize_t drm_edid_connector_property_show(struct drm_connector *connector, + char *buf, loff_t off, size_t count) +{ + const void *edid; + size_t size; + ssize_t ret = 0; + + mutex_lock(&connector->dev->mode_config.mutex); + + if (!connector->edid_blob_ptr) + goto unlock; + + edid = connector->edid_blob_ptr->data; + size = connector->edid_blob_ptr->length; + if (!edid) + goto unlock; + + if (off >= size) + goto unlock; + + if (off + count > size) + count = size - off; + + memcpy(buf, edid + off, count); + + ret = count; +unlock: + mutex_unlock(&connector->dev->mode_config.mutex); + + return ret; +} + /** * drm_edid_connector_update - Update connector information from EDID * @connector: Connector |