Add functions drm_edid_override_set() and drm_edid_override_reset() to
support "edid_override" connector debugfs, and to hide the details about
it in drm_edid.c. No functional changes at this time.
Also note in the connector.override_edid flag kernel-doc that this is
only supposed to be modified by the code doing debugfs EDID override
handling. Currently, it is still being modified by amdgpu in
create_eml_sink() and handle_edid_mgmt() for reasons unknown. This was
added in commit
4562236b3bc0 ("drm/amd/dc: Add dc display driver (v2)")
and later moved to amdgpu_dm.c in commit
e7b07ceef2a6 ("drm/amd/display:
Merge amdgpu_dm_types and amdgpu_dm").
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/8f6b4001630cafac5f44aa5913429ac9979743d2.1656494768.git.jani.nikula@intel.com
/* drm_edid.c */
void drm_mode_fixup_1366x768(struct drm_display_mode *mode);
+int drm_edid_override_set(struct drm_connector *connector, const void *edid, size_t size);
+int drm_edid_override_reset(struct drm_connector *connector);
struct seq_file *m = file->private_data;
struct drm_connector *connector = m->private;
char *buf;
- struct edid *edid;
int ret;
buf = memdup_user(ubuf, len);
if (IS_ERR(buf))
return PTR_ERR(buf);
- edid = (struct edid *) buf;
-
- if (len == 5 && !strncmp(buf, "reset", 5)) {
- connector->override_edid = false;
- ret = drm_connector_update_edid_property(connector, NULL);
- } else if (len < EDID_LENGTH ||
- EDID_LENGTH * (1 + edid->extensions) > len)
- ret = -EINVAL;
- else {
- connector->override_edid = false;
- ret = drm_connector_update_edid_property(connector, edid);
- if (!ret)
- connector->override_edid = true;
- }
+ if (len == 5 && !strncmp(buf, "reset", 5))
+ ret = drm_edid_override_reset(connector);
+ else
+ ret = drm_edid_override_set(connector, buf, len);
kfree(buf);
- return (ret) ? ret : len;
+ return ret ? ret : len;
}
/*
return IS_ERR(override) ? NULL : override;
}
+/* For debugfs edid_override implementation */
+int drm_edid_override_set(struct drm_connector *connector, const void *edid,
+ size_t size)
+{
+ int ret;
+
+ if (size < EDID_LENGTH || edid_size(edid) > size)
+ return -EINVAL;
+
+ connector->override_edid = false;
+
+ ret = drm_connector_update_edid_property(connector, edid);
+ if (!ret)
+ connector->override_edid = true;
+
+ return ret;
+}
+
+/* For debugfs edid_override implementation */
+int drm_edid_override_reset(struct drm_connector *connector)
+{
+ connector->override_edid = false;
+
+ return drm_connector_update_edid_property(connector, NULL);
+}
+
/**
* drm_add_override_edid_modes - add modes from override/firmware EDID
* @connector: connector we're probing
struct drm_cmdline_mode cmdline_mode;
/** @force: a DRM_FORCE_<foo> state for forced mode sets */
enum drm_connector_force force;
- /** @override_edid: has the EDID been overwritten through debugfs for testing? */
+ /**
+ * @override_edid: has the EDID been overwritten through debugfs for
+ * testing? Do not modify outside of drm_edid_override_set() and
+ * drm_edid_override_reset().
+ */
bool override_edid;
/** @epoch_counter: used to detect any other changes in connector, besides status */
u64 epoch_counter;