/* drm_edid_load.c: use a built-in EDID data set or load it via the firmware interface Copyright (C) 2012 Carsten Emde <C.Emde@osadl.org> This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. */ #include <linux/module.h> #include <linux/firmware.h> #include <drm/drmP.h> #include <drm/drm_crtc.h> #include <drm/drm_crtc_helper.h> #include <drm/drm_edid.h> static char edid_firmware[PATH_MAX]; module_param_string(edid_firmware, edid_firmware, sizeof(edid_firmware), 0644); 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] = { "edid/800x600.bin", "edid/1024x768.bin", "edid/1280x1024.bin", "edid/1600x1200.bin", "edid/1680x1050.bin", "edid/1920x1080.bin", }; static const u8 generic_edid[GENERIC_EDIDS][128] = { { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x16, 0x01, 0x03, 0x6d, 0x1b, 0x14, 0x78, 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25, 0x20, 0x50, 0x54, 0x01, 0x00, 0x00, 0x45, 0x40, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0xa0, 0x0f, 0x20, 0x00, 0x31, 0x58, 0x1c, 0x20, 0x28, 0x80, 0x14, 0x00, 0x15, 0xd0, 0x10, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b, 0x3d, 0x24, 0x26, 0x05, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc, 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x53, 0x56, 0x47, 0x41, 0x0a, 0x20, 0x20, 0x00, 0xc2, }, { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x16, 0x01, 0x03, 0x6d, 0x23, 0x1a, 0x78, 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25, 0x20, 0x50, 0x54, 0x00, 0x08, 0x00, 0x61, 0x40, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x64, 0x19, 0x00, 0x40, 0x41, 0x00, 0x26, 0x30, 0x08, 0x90, 0x36, 0x00, 0x63, 0x0a, 0x11, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b, 0x3d, 0x2f, 0x31, 0x07, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc, 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x58, 0x47, 0x41, 0x0a, 0x20, 0x20, 0x20, 0x00, 0x55, }, { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x16, 0x01, 0x03, 0x6d, 0x2c, 0x23, 0x78, 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25, 0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0x81, 0x80, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x30, 0x2a, 0x00, 0x98, 0x51, 0x00, 0x2a, 0x40, 0x30, 0x70, 0x13, 0x00, 0xbc, 0x63, 0x11, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b, 0x3d, 0x3e, 0x40, 0x0b, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc, 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x53, 0x58, 0x47, 0x41, 0x0a, 0x20, 0x20, 0x00, 0xa0, }, { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x16, 0x01, 0x03, 0x6d, 0x37, 0x29, 0x78, 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25, 0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0xa9, 0x40, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x48, 0x3f, 0x40, 0x30, 0x62, 0xb0, 0x32, 0x40, 0x40, 0xc0, 0x13, 0x00, 0x2b, 0xa0, 0x21, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b, 0x3d, 0x4a, 0x4c, 0x11, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc, 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x55, 0x58, 0x47, 0x41, 0x0a, 0x20, 0x20, 0x00, 0x9d, }, { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x16, 0x01, 0x03, 0x6d, 0x2b, 0x1b, 0x78, 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25, 0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0xb3, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x21, 0x39, 0x90, 0x30, 0x62, 0x1a, 0x27, 0x40, 0x68, 0xb0, 0x36, 0x00, 0xb5, 0x11, 0x11, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b, 0x3d, 0x40, 0x42, 0x0f, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc, 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x57, 0x53, 0x58, 0x47, 0x41, 0x0a, 0x20, 0x00, 0x26, }, { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x16, 0x01, 0x03, 0x6d, 0x32, 0x1c, 0x78, 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25, 0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0xd1, 0xc0, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c, 0x45, 0x00, 0xf4, 0x19, 0x11, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b, 0x3d, 0x42, 0x44, 0x0f, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc, 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x46, 0x48, 0x44, 0x0a, 0x20, 0x20, 0x20, 0x00, 0x05, }, }; static int edid_size(const u8 *edid, int data_size) { if (data_size < EDID_LENGTH) return 0; return (edid[0x7e] + 1) * EDID_LENGTH; } static void *edid_load(struct drm_connector *connector, const char *name, const char *connector_name) { const struct firmware *fw = NULL; const u8 *fwdata; u8 *edid; int fwsize, builtin; int i, valid_extensions = 0; bool print_bad_edid = !connector->bad_edid_counter || (drm_debug & DRM_UT_KMS); builtin = 0; for (i = 0; i < GENERIC_EDIDS; i++) { if (strcmp(name, generic_edid_name[i]) == 0) { fwdata = generic_edid[i]; fwsize = sizeof(generic_edid[i]); builtin = 1; break; } } if (!builtin) { struct platform_device *pdev; int err; pdev = platform_device_register_simple(connector_name, -1, NULL, 0); if (IS_ERR(pdev)) { DRM_ERROR("Failed to register EDID firmware platform device " "for connector \"%s\"\n", connector_name); return ERR_CAST(pdev); } err = request_firmware(&fw, name, &pdev->dev); platform_device_unregister(pdev); if (err) { DRM_ERROR("Requesting EDID firmware \"%s\" failed (err=%d)\n", name, err); return ERR_PTR(err); } fwdata = fw->data; fwsize = fw->size; } if (edid_size(fwdata, fwsize) != fwsize) { DRM_ERROR("Size of EDID firmware \"%s\" is invalid " "(expected %d, got %d\n", name, edid_size(fwdata, fwsize), (int)fwsize); edid = ERR_PTR(-EINVAL); goto out; } edid = kmemdup(fwdata, fwsize, GFP_KERNEL); if (edid == NULL) { edid = ERR_PTR(-ENOMEM); goto out; } if (!drm_edid_block_valid(edid, 0, print_bad_edid)) { connector->bad_edid_counter++; DRM_ERROR("Base block of EDID firmware \"%s\" is invalid ", name); kfree(edid); edid = ERR_PTR(-EINVAL); goto out; } for (i = 1; i <= edid[0x7e]; i++) { if (i != valid_extensions + 1) memcpy(edid + (valid_extensions + 1) * EDID_LENGTH, edid + i * EDID_LENGTH, EDID_LENGTH); if (drm_edid_block_valid(edid + i * EDID_LENGTH, i, print_bad_edid)) valid_extensions++; } if (valid_extensions != edid[0x7e]) { u8 *new_edid; edid[EDID_LENGTH-1] += edid[0x7e] - valid_extensions; DRM_INFO("Found %d valid extensions instead of %d in EDID data " "\"%s\" for connector \"%s\"\n", valid_extensions, edid[0x7e], name, connector_name); edid[0x7e] = valid_extensions; new_edid = krealloc(edid, (valid_extensions + 1) * EDID_LENGTH, GFP_KERNEL); if (new_edid) edid = new_edid; } DRM_INFO("Got %s EDID base block and %d extension%s from " "\"%s\" for connector \"%s\"\n", builtin ? "built-in" : "external", valid_extensions, valid_extensions == 1 ? "" : "s", name, connector_name); out: release_firmware(fw); return edid; } int drm_load_edid_firmware(struct drm_connector *connector) { const char *connector_name = connector->name; char *edidname = edid_firmware, *last, *colon; int ret; struct edid *edid; if (*edidname == '\0') return 0; colon = strchr(edidname, ':'); if (colon != NULL) { if (strncmp(connector_name, edidname, colon - edidname)) return 0; edidname = colon + 1; if (*edidname == '\0') return 0; } last = edidname + strlen(edidname) - 1; if (*last == '\n') *last = '\0'; edid = edid_load(connector, edidname, connector_name); if (IS_ERR_OR_NULL(edid)) return 0; drm_mode_connector_update_edid_property(connector, edid); ret = drm_add_edid_modes(connector, edid); drm_edid_to_eld(connector, edid); kfree(edid); return ret; }