mirror of
https://github.com/hyprwm/wlroots-hyprland.git
synced 2024-12-29 04:49:49 +01:00
278 lines
6.8 KiB
C
278 lines
6.8 KiB
C
#define _POSIX_C_SOURCE 200809L
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#include <assert.h>
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#include <drm_fourcc.h>
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#include <drm_mode.h>
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#include <drm.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <wlr/util/log.h>
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#include "backend/drm/drm.h"
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#include "backend/drm/util.h"
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int32_t calculate_refresh_rate(const drmModeModeInfo *mode) {
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int32_t refresh = (mode->clock * 1000000LL / mode->htotal +
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mode->vtotal / 2) / mode->vtotal;
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if (mode->flags & DRM_MODE_FLAG_INTERLACE) {
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refresh *= 2;
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}
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if (mode->flags & DRM_MODE_FLAG_DBLSCAN) {
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refresh /= 2;
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}
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if (mode->vscan > 1) {
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refresh /= mode->vscan;
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}
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return refresh;
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}
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enum wlr_output_mode_aspect_ratio get_picture_aspect_ratio(const drmModeModeInfo *mode) {
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switch (mode->flags & DRM_MODE_FLAG_PIC_AR_MASK) {
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case DRM_MODE_FLAG_PIC_AR_NONE:
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return WLR_OUTPUT_MODE_ASPECT_RATIO_NONE;
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case DRM_MODE_FLAG_PIC_AR_4_3:
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return WLR_OUTPUT_MODE_ASPECT_RATIO_4_3;
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case DRM_MODE_FLAG_PIC_AR_16_9:
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return WLR_OUTPUT_MODE_ASPECT_RATIO_16_9;
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case DRM_MODE_FLAG_PIC_AR_64_27:
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return WLR_OUTPUT_MODE_ASPECT_RATIO_64_27;
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case DRM_MODE_FLAG_PIC_AR_256_135:
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return WLR_OUTPUT_MODE_ASPECT_RATIO_256_135;
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default:
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wlr_log(WLR_ERROR, "Unknown mode picture aspect ratio: %u",
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mode->flags & DRM_MODE_FLAG_PIC_AR_MASK);
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return WLR_OUTPUT_MODE_ASPECT_RATIO_NONE;
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}
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}
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/* See https://en.wikipedia.org/wiki/Extended_Display_Identification_Data for layout of EDID data.
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* We don't parse the EDID properly. We just expect to receive valid data.
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*/
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void parse_edid(struct wlr_drm_connector *conn, size_t len, const uint8_t *data) {
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struct wlr_output *output = &conn->output;
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free(output->make);
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free(output->model);
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free(output->serial);
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output->make = NULL;
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output->model = NULL;
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output->serial = NULL;
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if (!data || len < 128) {
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return;
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}
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uint16_t id = (data[8] << 8) | data[9];
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const char *manu = get_pnp_manufacturer(id);
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char pnp_id[4];
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if (!manu) {
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// The ASCII 3-letter manufacturer PnP ID is encoded in 5-bit codes
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pnp_id[0] = ((id >> 10) & 0x1F) + '@';
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pnp_id[1] = ((id >> 5) & 0x1F) + '@';
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pnp_id[2] = ((id >> 0) & 0x1F) + '@';
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pnp_id[3] = '\0';
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manu = pnp_id;
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}
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output->make = strdup(manu);
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uint16_t model = data[10] | (data[11] << 8);
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char model_str[32];
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snprintf(model_str, sizeof(model_str), "0x%04" PRIX16, model);
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uint32_t serial = data[12] | (data[13] << 8) | (data[14] << 8) | (data[15] << 8);
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char serial_str[32];
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if (serial != 0) {
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snprintf(serial_str, sizeof(serial_str), "0x%08" PRIX32, serial);
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} else {
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serial_str[0] = '\0';
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}
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for (size_t i = 72; i <= 108; i += 18) {
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uint16_t flag = (data[i] << 8) | data[i + 1];
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if (flag == 0 && data[i + 3] == 0xFC) {
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snprintf(model_str, sizeof(model_str), "%.13s", &data[i + 5]);
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// Monitor names are terminated by newline if they're too short
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char *nl = strchr(model_str, '\n');
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if (nl) {
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*nl = '\0';
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}
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} else if (flag == 0 && data[i + 3] == 0xFF) {
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snprintf(serial_str, sizeof(serial_str), "%.13s", &data[i + 5]);
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// Monitor serial numbers are terminated by newline if they're too
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// short
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char* nl = strchr(serial_str, '\n');
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if (nl) {
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*nl = '\0';
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}
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}
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}
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output->model = strdup(model_str);
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if (serial_str[0] != '\0') {
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output->serial = strdup(serial_str);
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}
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}
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const char *drm_connector_status_str(drmModeConnection status) {
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switch (status) {
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case DRM_MODE_CONNECTED:
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return "connected";
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case DRM_MODE_DISCONNECTED:
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return "disconnected";
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case DRM_MODE_UNKNOWNCONNECTION:
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return "unknown";
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}
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return "<unsupported>";
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}
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static bool is_taken(size_t n, const uint32_t arr[static n], uint32_t key) {
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for (size_t i = 0; i < n; ++i) {
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if (arr[i] == key) {
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return true;
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}
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}
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return false;
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}
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/*
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* Store all of the non-recursive state in a struct, so we aren't literally
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* passing 12 arguments to a function.
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*/
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struct match_state {
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const size_t num_objs;
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const uint32_t *restrict objs;
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const size_t num_res;
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size_t score;
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size_t replaced;
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uint32_t *restrict res;
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uint32_t *restrict best;
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const uint32_t *restrict orig;
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bool exit_early;
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};
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/*
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* skips: The number of SKIP elements encountered so far.
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* score: The number of resources we've matched so far.
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* replaced: The number of changes from the original solution.
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* i: The index of the current element.
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*
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* This tries to match a solution as close to st->orig as it can.
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*
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* Returns whether we've set a new best element with this solution.
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*/
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static bool match_obj_(struct match_state *st, size_t skips, size_t score, size_t replaced, size_t i) {
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// Finished
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if (i >= st->num_res) {
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if (score > st->score ||
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(score == st->score && replaced < st->replaced)) {
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st->score = score;
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st->replaced = replaced;
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memcpy(st->best, st->res, sizeof(st->best[0]) * st->num_res);
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st->exit_early = (st->score == st->num_res - skips
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|| st->score == st->num_objs)
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&& st->replaced == 0;
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return true;
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} else {
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return false;
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}
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}
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if (st->orig[i] == SKIP) {
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st->res[i] = SKIP;
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return match_obj_(st, skips + 1, score, replaced, i + 1);
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}
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bool has_best = false;
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/*
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* Attempt to use the current solution first, to try and avoid
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* recalculating everything
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*/
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if (st->orig[i] != UNMATCHED && !is_taken(i, st->res, st->orig[i])) {
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st->res[i] = st->orig[i];
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size_t obj_score = st->objs[st->res[i]] != 0 ? 1 : 0;
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if (match_obj_(st, skips, score + obj_score, replaced, i + 1)) {
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has_best = true;
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}
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}
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if (st->orig[i] == UNMATCHED) {
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st->res[i] = UNMATCHED;
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if (match_obj_(st, skips, score, replaced, i + 1)) {
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has_best = true;
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}
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}
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if (st->exit_early) {
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return true;
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}
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if (st->orig[i] != UNMATCHED) {
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++replaced;
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}
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for (size_t candidate = 0; candidate < st->num_objs; ++candidate) {
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// We tried this earlier
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if (candidate == st->orig[i]) {
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continue;
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}
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// Not compatible
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if (!(st->objs[candidate] & (1 << i))) {
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continue;
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}
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// Already taken
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if (is_taken(i, st->res, candidate)) {
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continue;
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}
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st->res[i] = candidate;
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size_t obj_score = st->objs[candidate] != 0 ? 1 : 0;
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if (match_obj_(st, skips, score + obj_score, replaced, i + 1)) {
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has_best = true;
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}
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if (st->exit_early) {
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return true;
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}
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}
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if (has_best) {
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return true;
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}
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// Maybe this resource can't be matched
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st->res[i] = UNMATCHED;
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return match_obj_(st, skips, score, replaced, i + 1);
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}
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size_t match_obj(size_t num_objs, const uint32_t objs[static restrict num_objs],
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size_t num_res, const uint32_t res[static restrict num_res],
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uint32_t out[static restrict num_res]) {
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uint32_t solution[num_res];
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for (size_t i = 0; i < num_res; ++i) {
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solution[i] = UNMATCHED;
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}
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struct match_state st = {
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.num_objs = num_objs,
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.num_res = num_res,
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.score = 0,
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.replaced = SIZE_MAX,
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.objs = objs,
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.res = solution,
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.best = out,
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.orig = res,
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.exit_early = false,
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};
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match_obj_(&st, 0, 0, 0, 0);
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return st.score;
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}
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