diff options
Diffstat (limited to 'drivers/gpu/drm/drm_edid_load.c')
| -rw-r--r-- | drivers/gpu/drm/drm_edid_load.c | 295 |
1 files changed, 39 insertions, 256 deletions
diff --git a/drivers/gpu/drm/drm_edid_load.c b/drivers/gpu/drm/drm_edid_load.c index a4915099aaa9..d1c7e8298702 100644 --- a/drivers/gpu/drm/drm_edid_load.c +++ b/drivers/gpu/drm/drm_edid_load.c @@ -1,282 +1,62 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* 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 <linux/module.h> +#include <linux/platform_device.h> + +#include <drm/drm_connector.h> +#include <drm/drm_drv.h> #include <drm/drm_edid.h> +#include <drm/drm_print.h> + +#include "drm_crtc_internal.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. "); - -/* Use only for backward compatibility with drm_kms_helper.edid_firmware */ -int __drm_set_edid_firmware_path(const char *path) -{ - scnprintf(edid_firmware, sizeof(edid_firmware), "%s", path); - - return 0; -} -EXPORT_SYMBOL(__drm_set_edid_firmware_path); - -/* Use only for backward compatibility with drm_kms_helper.edid_firmware */ -int __drm_get_edid_firmware_path(char *buf, size_t bufsize) -{ - return scnprintf(buf, bufsize, "%s", edid_firmware); -} -EXPORT_SYMBOL(__drm_get_edid_firmware_path); - -#define GENERIC_EDIDS 6 -static const char * const 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; -} +MODULE_PARM_DESC(edid_firmware, + "Do not probe monitor, use specified EDID blob from /lib/firmware instead."); -static void *edid_load(struct drm_connector *connector, const char *name, - const char *connector_name) +static const struct drm_edid *edid_load(struct drm_connector *connector, const char *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 = match_string(generic_edid_name, GENERIC_EDIDS, name); - if (builtin >= 0) { - fwdata = generic_edid[builtin]; - fwsize = sizeof(generic_edid[builtin]); - } else { - 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; + const struct drm_edid *drm_edid; + int err; + + err = request_firmware(&fw, name, connector->dev->dev); + if (err) { + drm_err(connector->dev, + "[CONNECTOR:%d:%s] Requesting EDID firmware \"%s\" failed (err=%d)\n", + connector->base.id, connector->name, + name, err); + return ERR_PTR(err); } - if (!drm_edid_block_valid(edid, 0, print_bad_edid, - &connector->edid_corrupt)) { - connector->bad_edid_counter++; - DRM_ERROR("Base block of EDID firmware \"%s\" is invalid ", - name); - kfree(edid); - edid = ERR_PTR(-EINVAL); - goto out; - } + drm_dbg_kms(connector->dev, "[CONNECTOR:%d:%s] Loaded external firmware EDID \"%s\"\n", + connector->base.id, connector->name, name); - 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, - NULL)) - valid_extensions++; + drm_edid = drm_edid_alloc(fw->data, fw->size); + if (!drm_edid_valid(drm_edid)) { + drm_err(connector->dev, "Invalid firmware EDID \"%s\"\n", name); + drm_edid_free(drm_edid); + drm_edid = ERR_PTR(-EINVAL); } - 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 >= 0) ? "built-in" : - "external", valid_extensions, valid_extensions == 1 ? "" : "s", - name, connector_name); - -out: release_firmware(fw); - return edid; + + return drm_edid; } -struct edid *drm_load_edid_firmware(struct drm_connector *connector) +const struct drm_edid *drm_edid_load_firmware(struct drm_connector *connector) { - const char *connector_name = connector->name; char *edidname, *last, *colon, *fwstr, *edidstr, *fallback = NULL; - struct edid *edid; + const struct drm_edid *drm_edid; if (edid_firmware[0] == '\0') return ERR_PTR(-ENOENT); @@ -290,12 +70,14 @@ struct edid *drm_load_edid_firmware(struct drm_connector *connector) * the last one found one as a fallback. */ fwstr = kstrdup(edid_firmware, GFP_KERNEL); + if (!fwstr) + return ERR_PTR(-ENOMEM); edidstr = fwstr; while ((edidname = strsep(&edidstr, ","))) { colon = strchr(edidname, ':'); if (colon != NULL) { - if (strncmp(connector_name, edidname, colon - edidname)) + if (strncmp(connector->name, edidname, colon - edidname)) continue; edidname = colon + 1; break; @@ -317,8 +99,9 @@ struct edid *drm_load_edid_firmware(struct drm_connector *connector) if (*last == '\n') *last = '\0'; - edid = edid_load(connector, edidname, connector_name); + drm_edid = edid_load(connector, edidname); + kfree(fwstr); - return edid; + return drm_edid; } |