diff options
Diffstat (limited to 'drivers/gpu/drm/drm_edid_load.c')
| -rw-r--r-- | drivers/gpu/drm/drm_edid_load.c | 43 |
1 files changed, 34 insertions, 9 deletions
diff --git a/drivers/gpu/drm/drm_edid_load.c b/drivers/gpu/drm/drm_edid_load.c index c5605fe4907e..698b8c3b09d9 100644 --- a/drivers/gpu/drm/drm_edid_load.c +++ b/drivers/gpu/drm/drm_edid_load.c @@ -32,7 +32,7 @@ MODULE_PARM_DESC(edid_firmware, "Do not probe monitor, use specified EDID blob " "from built-in data or /lib/firmware instead. "); #define GENERIC_EDIDS 6 -static const char *generic_edid_name[GENERIC_EDIDS] = { +static const char * const generic_edid_name[GENERIC_EDIDS] = { "edid/800x600.bin", "edid/1024x768.bin", "edid/1280x1024.bin", @@ -264,20 +264,43 @@ out: int drm_load_edid_firmware(struct drm_connector *connector) { const char *connector_name = connector->name; - char *edidname = edid_firmware, *last, *colon; + char *edidname, *last, *colon, *fwstr, *edidstr, *fallback = NULL; int ret; struct edid *edid; - if (*edidname == '\0') + if (edid_firmware[0] == '\0') return 0; - colon = strchr(edidname, ':'); - if (colon != NULL) { - if (strncmp(connector_name, edidname, colon - edidname)) - return 0; - edidname = colon + 1; - if (*edidname == '\0') + /* + * If there are multiple edid files specified and separated + * by commas, search through the list looking for one that + * matches the connector. + * + * If there's one or more that don't't specify a connector, keep + * the last one found one as a fallback. + */ + fwstr = kstrdup(edid_firmware, GFP_KERNEL); + edidstr = fwstr; + + while ((edidname = strsep(&edidstr, ","))) { + colon = strchr(edidname, ':'); + if (colon != NULL) { + if (strncmp(connector_name, edidname, colon - edidname)) + continue; + edidname = colon + 1; + break; + } + + if (*edidname != '\0') /* corner case: multiple ',' */ + fallback = edidname; + } + + if (!edidname) { + if (!fallback) { + kfree(fwstr); return 0; + } + edidname = fallback; } last = edidname + strlen(edidname) - 1; @@ -285,6 +308,8 @@ int drm_load_edid_firmware(struct drm_connector *connector) *last = '\0'; edid = edid_load(connector, edidname, connector_name); + kfree(fwstr); + if (IS_ERR_OR_NULL(edid)) return 0; |