3    drm_edid_load.c: use a built-in EDID data set or load it via the firmware
22 MODULE_PARM_DESC(edid_firmware, "Do not probe monitor, use specified EDID blob "
43 	"edid/800x600.bin",
44 	"edid/1024x768.bin",
45 	"edid/1280x1024.bin",
46 	"edid/1600x1200.bin",
47 	"edid/1680x1050.bin",
48 	"edid/1920x1080.bin",
162 static int edid_size(const u8 *edid, int data_size)  in edid_size()  argument
167 	return (edid[0x7e] + 1) * EDID_LENGTH;  in edid_size()
175 	u8 *edid;  in edid_load()  local
190 			DRM_ERROR("Failed to register EDID firmware platform device "  in edid_load()
198 			DRM_ERROR("Requesting EDID firmware \"%s\" failed (err=%d)\n",  in edid_load()
208 		DRM_ERROR("Size of EDID firmware \"%s\" is invalid "  in edid_load()
211 		edid = ERR_PTR(-EINVAL);  in edid_load()
215 	edid = kmemdup(fwdata, fwsize, GFP_KERNEL);  in edid_load()
216 	if (edid == NULL) {  in edid_load()
217 		edid = ERR_PTR(-ENOMEM);  in edid_load()
221 	if (!drm_edid_block_valid(edid, 0, print_bad_edid,  in edid_load()
224 		DRM_ERROR("Base block of EDID firmware \"%s\" is invalid ",  in edid_load()
226 		kfree(edid);  in edid_load()
227 		edid = ERR_PTR(-EINVAL);  in edid_load()
231 	for (i = 1; i <= edid[0x7e]; i++) {  in edid_load()
233 			memcpy(edid + (valid_extensions + 1) * EDID_LENGTH,  in edid_load()
234 			    edid + i * EDID_LENGTH, EDID_LENGTH);  in edid_load()
235 		if (drm_edid_block_valid(edid + i * EDID_LENGTH, i,  in edid_load()
241 	if (valid_extensions != edid[0x7e]) {  in edid_load()
244 		edid[EDID_LENGTH-1] += edid[0x7e] - valid_extensions;  in edid_load()
245 		DRM_INFO("Found %d valid extensions instead of %d in EDID data "  in edid_load()
247 		    edid[0x7e], name, connector_name);  in edid_load()
248 		edid[0x7e] = valid_extensions;  in edid_load()
250 		new_edid = krealloc(edid, (valid_extensions + 1) * EDID_LENGTH,  in edid_load()
253 			edid = new_edid;  in edid_load()
256 	DRM_INFO("Got %s EDID base block and %d extension%s from "  in edid_load()
263 	return edid;  in edid_load()
266 struct edid *drm_load_edid_firmware(struct drm_connector *connector)  in drm_load_edid_firmware()
270 	struct edid *edid;  in drm_load_edid_firmware()  local
276 	 * If there are multiple edid files specified and separated  in drm_load_edid_firmware()
313 	edid = edid_load(connector, edidname, connector_name);  in drm_load_edid_firmware()
316 	return edid;  in drm_load_edid_firmware()