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322 lines
10 KiB
322 lines
10 KiB
/* |
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drm_edid_load.c: use a built-in EDID data set or load it via the firmware |
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interface |
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Copyright (C) 2012 Carsten Emde <C.Emde@osadl.org> |
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This program is free software; you can redistribute it and/or |
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modify it under the terms of the GNU General Public License |
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as published by the Free Software Foundation; either version 2 |
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of the License, or (at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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*/ |
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#include <linux/module.h> |
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#include <linux/firmware.h> |
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#include <drm/drmP.h> |
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#include <drm/drm_crtc.h> |
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#include <drm/drm_crtc_helper.h> |
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#include <drm/drm_edid.h> |
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static char edid_firmware[PATH_MAX]; |
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module_param_string(edid_firmware, edid_firmware, sizeof(edid_firmware), 0644); |
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MODULE_PARM_DESC(edid_firmware, "Do not probe monitor, use specified EDID blob " |
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"from built-in data or /lib/firmware instead. "); |
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#define GENERIC_EDIDS 6 |
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static const char * const generic_edid_name[GENERIC_EDIDS] = { |
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"edid/800x600.bin", |
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"edid/1024x768.bin", |
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"edid/1280x1024.bin", |
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"edid/1600x1200.bin", |
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"edid/1680x1050.bin", |
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"edid/1920x1080.bin", |
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}; |
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static const u8 generic_edid[GENERIC_EDIDS][128] = { |
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{ |
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0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, |
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0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x05, 0x16, 0x01, 0x03, 0x6d, 0x1b, 0x14, 0x78, |
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0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25, |
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0x20, 0x50, 0x54, 0x01, 0x00, 0x00, 0x45, 0x40, |
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0xa0, 0x0f, |
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0x20, 0x00, 0x31, 0x58, 0x1c, 0x20, 0x28, 0x80, |
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0x14, 0x00, 0x15, 0xd0, 0x10, 0x00, 0x00, 0x1e, |
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0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e, |
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0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20, |
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0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b, |
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0x3d, 0x24, 0x26, 0x05, 0x00, 0x0a, 0x20, 0x20, |
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0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc, |
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0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x53, |
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0x56, 0x47, 0x41, 0x0a, 0x20, 0x20, 0x00, 0xc2, |
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}, |
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{ |
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0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, |
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0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x05, 0x16, 0x01, 0x03, 0x6d, 0x23, 0x1a, 0x78, |
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0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25, |
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0x20, 0x50, 0x54, 0x00, 0x08, 0x00, 0x61, 0x40, |
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x64, 0x19, |
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0x00, 0x40, 0x41, 0x00, 0x26, 0x30, 0x08, 0x90, |
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0x36, 0x00, 0x63, 0x0a, 0x11, 0x00, 0x00, 0x18, |
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0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e, |
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0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20, |
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0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b, |
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0x3d, 0x2f, 0x31, 0x07, 0x00, 0x0a, 0x20, 0x20, |
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0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc, |
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0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x58, |
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0x47, 0x41, 0x0a, 0x20, 0x20, 0x20, 0x00, 0x55, |
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}, |
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{ |
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0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, |
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0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x05, 0x16, 0x01, 0x03, 0x6d, 0x2c, 0x23, 0x78, |
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0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25, |
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0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0x81, 0x80, |
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x30, 0x2a, |
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0x00, 0x98, 0x51, 0x00, 0x2a, 0x40, 0x30, 0x70, |
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0x13, 0x00, 0xbc, 0x63, 0x11, 0x00, 0x00, 0x1e, |
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0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e, |
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0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20, |
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0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b, |
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0x3d, 0x3e, 0x40, 0x0b, 0x00, 0x0a, 0x20, 0x20, |
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0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc, |
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0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x53, |
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0x58, 0x47, 0x41, 0x0a, 0x20, 0x20, 0x00, 0xa0, |
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}, |
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{ |
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0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, |
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0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x05, 0x16, 0x01, 0x03, 0x6d, 0x37, 0x29, 0x78, |
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0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25, |
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0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0xa9, 0x40, |
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x48, 0x3f, |
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0x40, 0x30, 0x62, 0xb0, 0x32, 0x40, 0x40, 0xc0, |
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0x13, 0x00, 0x2b, 0xa0, 0x21, 0x00, 0x00, 0x1e, |
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0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e, |
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0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20, |
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0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b, |
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0x3d, 0x4a, 0x4c, 0x11, 0x00, 0x0a, 0x20, 0x20, |
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0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc, |
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0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x55, |
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0x58, 0x47, 0x41, 0x0a, 0x20, 0x20, 0x00, 0x9d, |
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}, |
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{ |
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0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, |
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0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x05, 0x16, 0x01, 0x03, 0x6d, 0x2b, 0x1b, 0x78, |
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0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25, |
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0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0xb3, 0x00, |
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x21, 0x39, |
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0x90, 0x30, 0x62, 0x1a, 0x27, 0x40, 0x68, 0xb0, |
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0x36, 0x00, 0xb5, 0x11, 0x11, 0x00, 0x00, 0x1e, |
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0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e, |
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0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20, |
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0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b, |
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0x3d, 0x40, 0x42, 0x0f, 0x00, 0x0a, 0x20, 0x20, |
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0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc, |
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0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x57, |
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0x53, 0x58, 0x47, 0x41, 0x0a, 0x20, 0x00, 0x26, |
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}, |
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{ |
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0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, |
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0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x05, 0x16, 0x01, 0x03, 0x6d, 0x32, 0x1c, 0x78, |
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0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25, |
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0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0xd1, 0xc0, |
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x3a, |
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0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c, |
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0x45, 0x00, 0xf4, 0x19, 0x11, 0x00, 0x00, 0x1e, |
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0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e, |
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0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20, |
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0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b, |
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0x3d, 0x42, 0x44, 0x0f, 0x00, 0x0a, 0x20, 0x20, |
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0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc, |
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0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x46, |
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0x48, 0x44, 0x0a, 0x20, 0x20, 0x20, 0x00, 0x05, |
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}, |
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}; |
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static int edid_size(const u8 *edid, int data_size) |
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{ |
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if (data_size < EDID_LENGTH) |
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return 0; |
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return (edid[0x7e] + 1) * EDID_LENGTH; |
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} |
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static void *edid_load(struct drm_connector *connector, const char *name, |
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const char *connector_name) |
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{ |
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const struct firmware *fw = NULL; |
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const u8 *fwdata; |
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u8 *edid; |
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int fwsize, builtin; |
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int i, valid_extensions = 0; |
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bool print_bad_edid = !connector->bad_edid_counter || (drm_debug & DRM_UT_KMS); |
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builtin = 0; |
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for (i = 0; i < GENERIC_EDIDS; i++) { |
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if (strcmp(name, generic_edid_name[i]) == 0) { |
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fwdata = generic_edid[i]; |
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fwsize = sizeof(generic_edid[i]); |
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builtin = 1; |
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break; |
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} |
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} |
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if (!builtin) { |
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struct platform_device *pdev; |
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int err; |
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pdev = platform_device_register_simple(connector_name, -1, NULL, 0); |
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if (IS_ERR(pdev)) { |
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DRM_ERROR("Failed to register EDID firmware platform device " |
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"for connector \"%s\"\n", connector_name); |
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return ERR_CAST(pdev); |
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} |
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err = request_firmware(&fw, name, &pdev->dev); |
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platform_device_unregister(pdev); |
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if (err) { |
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DRM_ERROR("Requesting EDID firmware \"%s\" failed (err=%d)\n", |
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name, err); |
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return ERR_PTR(err); |
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} |
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fwdata = fw->data; |
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fwsize = fw->size; |
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} |
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if (edid_size(fwdata, fwsize) != fwsize) { |
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DRM_ERROR("Size of EDID firmware \"%s\" is invalid " |
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"(expected %d, got %d\n", name, |
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edid_size(fwdata, fwsize), (int)fwsize); |
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edid = ERR_PTR(-EINVAL); |
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goto out; |
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} |
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edid = kmemdup(fwdata, fwsize, GFP_KERNEL); |
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if (edid == NULL) { |
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edid = ERR_PTR(-ENOMEM); |
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goto out; |
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} |
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if (!drm_edid_block_valid(edid, 0, print_bad_edid, |
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&connector->edid_corrupt)) { |
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connector->bad_edid_counter++; |
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DRM_ERROR("Base block of EDID firmware \"%s\" is invalid ", |
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name); |
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kfree(edid); |
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edid = ERR_PTR(-EINVAL); |
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goto out; |
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} |
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for (i = 1; i <= edid[0x7e]; i++) { |
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if (i != valid_extensions + 1) |
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memcpy(edid + (valid_extensions + 1) * EDID_LENGTH, |
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edid + i * EDID_LENGTH, EDID_LENGTH); |
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if (drm_edid_block_valid(edid + i * EDID_LENGTH, i, |
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print_bad_edid, |
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NULL)) |
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valid_extensions++; |
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} |
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if (valid_extensions != edid[0x7e]) { |
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u8 *new_edid; |
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edid[EDID_LENGTH-1] += edid[0x7e] - valid_extensions; |
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DRM_INFO("Found %d valid extensions instead of %d in EDID data " |
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"\"%s\" for connector \"%s\"\n", valid_extensions, |
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edid[0x7e], name, connector_name); |
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edid[0x7e] = valid_extensions; |
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new_edid = krealloc(edid, (valid_extensions + 1) * EDID_LENGTH, |
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GFP_KERNEL); |
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if (new_edid) |
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edid = new_edid; |
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} |
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DRM_INFO("Got %s EDID base block and %d extension%s from " |
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"\"%s\" for connector \"%s\"\n", builtin ? "built-in" : |
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"external", valid_extensions, valid_extensions == 1 ? "" : "s", |
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name, connector_name); |
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out: |
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release_firmware(fw); |
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return edid; |
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} |
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int drm_load_edid_firmware(struct drm_connector *connector) |
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{ |
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const char *connector_name = connector->name; |
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char *edidname, *last, *colon, *fwstr, *edidstr, *fallback = NULL; |
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int ret; |
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struct edid *edid; |
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if (edid_firmware[0] == '\0') |
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return 0; |
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/* |
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* If there are multiple edid files specified and separated |
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* by commas, search through the list looking for one that |
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* matches the connector. |
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* |
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* If there's one or more that don't't specify a connector, keep |
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* the last one found one as a fallback. |
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*/ |
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fwstr = kstrdup(edid_firmware, GFP_KERNEL); |
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edidstr = fwstr; |
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while ((edidname = strsep(&edidstr, ","))) { |
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colon = strchr(edidname, ':'); |
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if (colon != NULL) { |
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if (strncmp(connector_name, edidname, colon - edidname)) |
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continue; |
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edidname = colon + 1; |
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break; |
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} |
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if (*edidname != '\0') /* corner case: multiple ',' */ |
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fallback = edidname; |
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} |
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if (!edidname) { |
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if (!fallback) { |
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kfree(fwstr); |
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return 0; |
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} |
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edidname = fallback; |
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} |
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last = edidname + strlen(edidname) - 1; |
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if (*last == '\n') |
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*last = '\0'; |
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edid = edid_load(connector, edidname, connector_name); |
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kfree(fwstr); |
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if (IS_ERR_OR_NULL(edid)) |
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return 0; |
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drm_mode_connector_update_edid_property(connector, edid); |
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ret = drm_add_edid_modes(connector, edid); |
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drm_edid_to_eld(connector, edid); |
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kfree(edid); |
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return ret; |
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}
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