backend/drm: use pnp.ids to fetch EDID data

This commit is contained in:
illiliti 2022-06-27 00:11:47 +03:00
parent d75b4d8e86
commit eec95e3d5e
8 changed files with 63 additions and 77 deletions

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@ -17,6 +17,7 @@ packages:
- xcb-util-wm-dev
- xwayland
- libseat-dev
- hwdata
sources:
- https://gitlab.freedesktop.org/wlroots/wlroots.git
tasks:

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@ -18,6 +18,7 @@ packages:
- vulkan-icd-loader
- vulkan-headers
- glslang
- hwdata
sources:
- https://gitlab.freedesktop.org/wlroots/wlroots.git
tasks:

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@ -25,6 +25,7 @@ packages:
- x11-servers/xwayland
- sysutils/seatd
- gmake
- hwdata
sources:
- https://gitlab.freedesktop.org/wlroots/wlroots.git
tasks:

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@ -51,6 +51,7 @@ Install dependencies:
* udev
* pixman
* [libseat]
* [hwdata] (optional, for the DRM backend)
If you choose to enable X11 support:
@ -78,4 +79,5 @@ See [CONTRIBUTING.md].
[#sway-devel on Libera Chat]: https://web.libera.chat/gamja/?channels=#sway-devel
[wrapper libraries]: https://gitlab.freedesktop.org/wlroots/wlroots/-/wikis/Projects-which-use-wlroots#wrapper-libraries
[libseat]: https://git.sr.ht/~kennylevinsen/seatd
[hwdata]: https://github.com/vcrhonek/hwdata
[CONTRIBUTING.md]: https://gitlab.freedesktop.org/wlroots/wlroots/-/blob/master/CONTRIBUTING.md

27
backend/drm/gen_pnpids.sh Executable file
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@ -0,0 +1,27 @@
#!/bin/sh -eu
#
# usage: gen_pnpids.sh < pnp.ids > pnpids.c
gen_pnps()
{
while read -r id vendor; do
[ "${#id}" = 3 ] || exit 1
printf "\tcase PNP_ID('%c', '%c', '%c'): return \"%s\";\n" \
"$id" "${id#?}" "${id#??}" "$vendor"
done
}
cat << EOF
#include <stdint.h>
#include <stddef.h>
#include "backend/drm/util.h"
#define PNP_ID(a, b, c) ((a & 0x1f) << 10) | ((b & 0x1f) << 5) | (c & 0x1f)
const char *get_pnp_manufacturer(uint16_t code) {
switch (code) {
$(gen_pnps)
}
return NULL;
}
#undef PNP_ID
EOF

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@ -1,3 +1,21 @@
hwdata = dependency('hwdata', required: false, native: true)
if hwdata.found()
hwdata_dir = hwdata.get_variable(pkgconfig: 'pkgdatadir')
pnp_ids = files(hwdata_dir / 'pnp.ids')
else
pnp_ids = files('/usr/share/hwdata/pnp.ids')
endif
pnpids_c = custom_target(
'pnpids.c',
output: 'pnpids.c',
input: pnp_ids,
feed: true,
capture: true,
command: files('gen_pnpids.sh'),
)
wlr_files += pnpids_c
wlr_files += files(
'atomic.c',
'backend.c',

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@ -48,82 +48,6 @@ enum wlr_output_mode_aspect_ratio get_picture_aspect_ratio(const drmModeModeInfo
}
}
// Constructed from http://edid.tv/manufacturer
static const char *get_manufacturer(uint16_t id) {
#define ID(a, b, c) ((a & 0x1f) << 10) | ((b & 0x1f) << 5) | (c & 0x1f)
switch (id) {
case ID('A', 'A', 'A'): return "Avolites Ltd";
case ID('A', 'C', 'I'): return "Ancor Communications Inc";
case ID('A', 'C', 'R'): return "Acer Technologies";
case ID('A', 'D', 'A'): return "Addi-Data GmbH";
case ID('A', 'P', 'P'): return "Apple Computer Inc";
case ID('A', 'S', 'K'): return "Ask A/S";
case ID('A', 'V', 'T'): return "Avtek (Electronics) Pty Ltd";
case ID('B', 'N', 'O'): return "Bang & Olufsen";
case ID('B', 'N', 'Q'): return "BenQ Corporation";
case ID('C', 'M', 'N'): return "Chimei Innolux Corporation";
case ID('C', 'M', 'O'): return "Chi Mei Optoelectronics corp.";
case ID('C', 'R', 'O'): return "Extraordinary Technologies PTY Limited";
case ID('D', 'E', 'L'): return "Dell Inc.";
case ID('D', 'G', 'C'): return "Data General Corporation";
case ID('D', 'O', 'N'): return "DENON, Ltd.";
case ID('E', 'N', 'C'): return "Eizo Nanao Corporation";
case ID('E', 'P', 'H'): return "Epiphan Systems Inc.";
case ID('E', 'X', 'P'): return "Data Export Corporation";
case ID('F', 'N', 'I'): return "Funai Electric Co., Ltd.";
case ID('F', 'U', 'S'): return "Fujitsu Siemens Computers GmbH";
case ID('G', 'S', 'M'): return "Goldstar Company Ltd";
case ID('H', 'I', 'Q'): return "Kaohsiung Opto Electronics Americas, Inc.";
case ID('H', 'S', 'D'): return "HannStar Display Corp";
case ID('H', 'T', 'C'): return "Hitachi Ltd";
case ID('H', 'W', 'P'): return "Hewlett Packard";
case ID('I', 'N', 'T'): return "Interphase Corporation";
case ID('I', 'N', 'X'): return "Communications Supply Corporation (A division of WESCO)";
case ID('I', 'T', 'E'): return "Integrated Tech Express Inc";
case ID('I', 'V', 'M'): return "Iiyama North America";
case ID('L', 'E', 'N'): return "Lenovo Group Limited";
case ID('M', 'A', 'X'): return "Rogen Tech Distribution Inc";
case ID('M', 'E', 'G'): return "Abeam Tech Ltd";
case ID('M', 'E', 'I'): return "Panasonic Industry Company";
case ID('M', 'T', 'C'): return "Mars-Tech Corporation";
case ID('M', 'T', 'X'): return "Matrox";
case ID('N', 'E', 'C'): return "NEC Corporation";
case ID('N', 'E', 'X'): return "Nexgen Mediatech Inc.";
case ID('O', 'N', 'K'): return "ONKYO Corporation";
case ID('O', 'R', 'N'): return "ORION ELECTRIC CO., LTD.";
case ID('O', 'T', 'M'): return "Optoma Corporation";
case ID('O', 'V', 'R'): return "Oculus VR, Inc.";
case ID('P', 'H', 'L'): return "Philips Consumer Electronics Company";
case ID('P', 'I', 'O'): return "Pioneer Electronic Corporation";
case ID('P', 'N', 'R'): return "Planar Systems, Inc.";
case ID('Q', 'D', 'S'): return "Quanta Display Inc.";
case ID('R', 'A', 'T'): return "Rent-A-Tech";
case ID('R', 'E', 'N'): return "Renesas Technology Corp.";
case ID('S', 'A', 'M'): return "Samsung Electric Company";
case ID('S', 'A', 'N'): return "Sanyo Electric Co., Ltd.";
case ID('S', 'E', 'C'): return "Seiko Epson Corporation";
case ID('S', 'H', 'P'): return "Sharp Corporation";
case ID('S', 'I', 'I'): return "Silicon Image, Inc.";
case ID('S', 'N', 'Y'): return "Sony";
case ID('S', 'T', 'D'): return "STD Computer Inc";
case ID('S', 'V', 'S'): return "SVSI";
case ID('S', 'Y', 'N'): return "Synaptics Inc";
case ID('T', 'C', 'L'): return "Technical Concepts Ltd";
case ID('T', 'O', 'P'): return "Orion Communications Co., Ltd.";
case ID('T', 'S', 'B'): return "Toshiba America Info Systems Inc";
case ID('T', 'S', 'T'): return "Transtream Inc";
case ID('U', 'N', 'K'): return "Unknown";
case ID('V', 'E', 'S'): return "Vestel Elektronik Sanayi ve Ticaret A. S.";
case ID('V', 'I', 'T'): return "Visitech AS";
case ID('V', 'I', 'Z'): return "VIZIO, Inc";
case ID('V', 'L', 'V'): return "Valve";
case ID('V', 'S', 'C'): return "ViewSonic Corporation";
case ID('Y', 'M', 'H'): return "Yamaha Corporation";
default: return "Unknown";
}
#undef ID
}
/* See https://en.wikipedia.org/wiki/Extended_Display_Identification_Data for layout of EDID data.
* We don't parse the EDID properly. We just expect to receive valid data.
*/
@ -142,7 +66,17 @@ void parse_edid(struct wlr_drm_connector *conn, size_t len, const uint8_t *data)
}
uint16_t id = (data[8] << 8) | data[9];
output->make = strdup(get_manufacturer(id));
const char *manu = get_pnp_manufacturer(id);
char pnp_id[4];
if (!manu) {
// The ASCII 3-letter manufacturer PnP ID is encoded in 5-bit codes
pnp_id[0] = ((id >> 10) & 0x1F) + '@';
pnp_id[1] = ((id >> 5) & 0x1F) + '@';
pnp_id[2] = ((id >> 0) & 0x1F) + '@';
pnp_id[3] = '\0';
manu = pnp_id;
}
output->make = strdup(manu);
uint16_t model = data[10] | (data[11] << 8);
char model_str[32];

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@ -10,6 +10,8 @@ struct wlr_drm_connector;
// Calculates a more accurate refresh rate (mHz) than what mode itself provides
int32_t calculate_refresh_rate(const drmModeModeInfo *mode);
enum wlr_output_mode_aspect_ratio get_picture_aspect_ratio(const drmModeModeInfo *mode);
// Returns manufacturer based on pnp id
const char *get_pnp_manufacturer(uint16_t code);
// Populates the make/model/phys_{width,height} of output from the edid data
void parse_edid(struct wlr_drm_connector *conn, size_t len, const uint8_t *data);