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path: root/drivers/gpu/drm/drm_edid_load.c
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Diffstat (limited to 'drivers/gpu/drm/drm_edid_load.c')
-rw-r--r--drivers/gpu/drm/drm_edid_load.c250
1 files changed, 250 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_edid_load.c b/drivers/gpu/drm/drm_edid_load.c
new file mode 100644
index 00000000000..da9acba2dd6
--- /dev/null
+++ b/drivers/gpu/drm/drm_edid_load.c
@@ -0,0 +1,250 @@
+/*
+ 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 "drmP.h"
+#include "drm_crtc.h"
+#include "drm_crtc_helper.h"
+#include "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 4
+static char *generic_edid_name[GENERIC_EDIDS] = {
+ "edid/1024x768.bin",
+ "edid/1280x1024.bin",
+ "edid/1680x1050.bin",
+ "edid/1920x1080.bin",
+};
+
+static 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, 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, 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_load(struct drm_connector *connector, char *name,
+ char *connector_name)
+{
+ const struct firmware *fw;
+ struct platform_device *pdev;
+ u8 *fwdata = NULL, *edid;
+ int fwsize, expected;
+ int builtin = 0, err = 0;
+ int i, valid_extensions = 0;
+
+ 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);
+ err = -EINVAL;
+ goto out;
+ }
+
+ err = request_firmware(&fw, name, &pdev->dev);
+ platform_device_unregister(pdev);
+
+ if (err) {
+ i = 0;
+ while (i < GENERIC_EDIDS && strcmp(name, generic_edid_name[i]))
+ i++;
+ if (i < GENERIC_EDIDS) {
+ err = 0;
+ builtin = 1;
+ fwdata = generic_edid[i];
+ fwsize = sizeof(generic_edid[i]);
+ }
+ }
+
+ if (err) {
+ DRM_ERROR("Requesting EDID firmware \"%s\" failed (err=%d)\n",
+ name, err);
+ goto out;
+ }
+
+ if (fwdata == NULL) {
+ fwdata = (u8 *) fw->data;
+ fwsize = fw->size;
+ }
+
+ expected = (fwdata[0x7e] + 1) * EDID_LENGTH;
+ if (expected != fwsize) {
+ DRM_ERROR("Size of EDID firmware \"%s\" is invalid "
+ "(expected %d, got %d)\n", name, expected, (int) fwsize);
+ err = -EINVAL;
+ goto relfw_out;
+ }
+
+ edid = kmalloc(fwsize, GFP_KERNEL);
+ if (edid == NULL) {
+ err = -ENOMEM;
+ goto relfw_out;
+ }
+ memcpy(edid, fwdata, fwsize);
+
+ if (!drm_edid_block_valid(edid)) {
+ DRM_ERROR("Base block of EDID firmware \"%s\" is invalid ",
+ name);
+ kfree(edid);
+ err = -EINVAL;
+ goto relfw_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))
+ valid_extensions++;
+ }
+
+ if (valid_extensions != edid[0x7e]) {
+ 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;
+ edid = krealloc(edid, (valid_extensions + 1) * EDID_LENGTH,
+ GFP_KERNEL);
+ if (edid == NULL) {
+ err = -ENOMEM;
+ goto relfw_out;
+ }
+ }
+
+ connector->display_info.raw_edid = 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);
+
+relfw_out:
+ release_firmware(fw);
+
+out:
+ return err;
+}
+
+int drm_load_edid_firmware(struct drm_connector *connector)
+{
+ char *connector_name = drm_get_connector_name(connector);
+ char *edidname = edid_firmware, *last, *colon;
+ int ret = 0;
+
+ if (*edidname == '\0')
+ return ret;
+
+ colon = strchr(edidname, ':');
+ if (colon != NULL) {
+ if (strncmp(connector_name, edidname, colon - edidname))
+ return ret;
+ edidname = colon + 1;
+ if (*edidname == '\0')
+ return ret;
+ }
+
+ last = edidname + strlen(edidname) - 1;
+ if (*last == '\n')
+ *last = '\0';
+
+ ret = edid_load(connector, edidname, connector_name);
+ if (ret)
+ return 0;
+
+ drm_mode_connector_update_edid_property(connector,
+ (struct edid *) connector->display_info.raw_edid);
+
+ return drm_add_edid_modes(connector, (struct edid *)
+ connector->display_info.raw_edid);
+}