2    drm_edid_load.c: use a built-in EDID data set or load it via the firmware
31 MODULE_PARM_DESC(edid_firmware, "Do not probe monitor, use specified EDID blob "
52 	"edid/800x600.bin",
53 	"edid/1024x768.bin",
54 	"edid/1280x1024.bin",
55 	"edid/1600x1200.bin",
56 	"edid/1680x1050.bin",
57 	"edid/1920x1080.bin",
171 static int edid_size(const u8 *edid, int data_size)  in edid_size()  argument
176 	return (edid[0x7e] + 1) * EDID_LENGTH;  in edid_size()
184 	u8 *edid;  in edid_load()  local
199 			DRM_ERROR("Failed to register EDID firmware platform device "  in edid_load()
207 			DRM_ERROR("Requesting EDID firmware \"%s\" failed (err=%d)\n",  in edid_load()
217 		DRM_ERROR("Size of EDID firmware \"%s\" is invalid "  in edid_load()
220 		edid = ERR_PTR(-EINVAL);  in edid_load()
224 	edid = kmemdup(fwdata, fwsize, GFP_KERNEL);  in edid_load()
225 	if (edid == NULL) {  in edid_load()
226 		edid = ERR_PTR(-ENOMEM);  in edid_load()
230 	if (!drm_edid_block_valid(edid, 0, print_bad_edid,  in edid_load()
233 		DRM_ERROR("Base block of EDID firmware \"%s\" is invalid ",  in edid_load()
235 		kfree(edid);  in edid_load()
236 		edid = ERR_PTR(-EINVAL);  in edid_load()
240 	for (i = 1; i <= edid[0x7e]; i++) {  in edid_load()
242 			memcpy(edid + (valid_extensions + 1) * EDID_LENGTH,  in edid_load()
243 			    edid + i * EDID_LENGTH, EDID_LENGTH);  in edid_load()
244 		if (drm_edid_block_valid(edid + i * EDID_LENGTH, i,  in edid_load()
250 	if (valid_extensions != edid[0x7e]) {  in edid_load()
253 		edid[EDID_LENGTH-1] += edid[0x7e] - valid_extensions;  in edid_load()
254 		DRM_INFO("Found %d valid extensions instead of %d in EDID data "  in edid_load()
256 		    edid[0x7e], name, connector_name);  in edid_load()
257 		edid[0x7e] = valid_extensions;  in edid_load()
259 		new_edid = krealloc(edid, (valid_extensions + 1) * EDID_LENGTH,  in edid_load()
262 			edid = new_edid;  in edid_load()
265 	DRM_INFO("Got %s EDID base block and %d extension%s from "  in edid_load()
272 	return edid;  in edid_load()
275 struct edid *drm_load_edid_firmware(struct drm_connector *connector)  in drm_load_edid_firmware()
279 	struct edid *edid;  in drm_load_edid_firmware()  local
285 	 * If there are multiple edid files specified and separated  in drm_load_edid_firmware()
322 	edid = edid_load(connector, edidname, connector_name);  in drm_load_edid_firmware()
325 	return edid;  in drm_load_edid_firmware()