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813 lines
22 KiB
813 lines
22 KiB
/*
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* Copyright © 2008-2011 Kristian Høgsberg
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* Copyright © 2011 Intel Corporation
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* Copyright © 2017, 2018 Collabora, Ltd.
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* Copyright © 2017, 2018 General Electric Company
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* Copyright (c) 2018 DisplayLink (UK) Ltd.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "config.h"
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#include <xf86drm.h>
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#include <xf86drmMode.h>
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#include "drm-internal.h"
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#include "shared/weston-drm-fourcc.h"
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static const char *const aspect_ratio_as_string[] = {
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[WESTON_MODE_PIC_AR_NONE] = "",
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[WESTON_MODE_PIC_AR_4_3] = " 4:3",
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[WESTON_MODE_PIC_AR_16_9] = " 16:9",
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[WESTON_MODE_PIC_AR_64_27] = " 64:27",
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[WESTON_MODE_PIC_AR_256_135] = " 256:135",
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};
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/*
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* Get the aspect-ratio from drmModeModeInfo mode flags.
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*
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* @param drm_mode_flags- flags from drmModeModeInfo structure.
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* @returns aspect-ratio as encoded in enum 'weston_mode_aspect_ratio'.
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*/
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static enum weston_mode_aspect_ratio
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drm_to_weston_mode_aspect_ratio(uint32_t drm_mode_flags)
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{
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switch (drm_mode_flags & DRM_MODE_FLAG_PIC_AR_MASK) {
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case DRM_MODE_FLAG_PIC_AR_4_3:
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return WESTON_MODE_PIC_AR_4_3;
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case DRM_MODE_FLAG_PIC_AR_16_9:
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return WESTON_MODE_PIC_AR_16_9;
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case DRM_MODE_FLAG_PIC_AR_64_27:
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return WESTON_MODE_PIC_AR_64_27;
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case DRM_MODE_FLAG_PIC_AR_256_135:
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return WESTON_MODE_PIC_AR_256_135;
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case DRM_MODE_FLAG_PIC_AR_NONE:
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default:
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return WESTON_MODE_PIC_AR_NONE;
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}
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}
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static const char *
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aspect_ratio_to_string(enum weston_mode_aspect_ratio ratio)
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{
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if (ratio < 0 || ratio >= ARRAY_LENGTH(aspect_ratio_as_string) ||
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!aspect_ratio_as_string[ratio])
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return " (unknown aspect ratio)";
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return aspect_ratio_as_string[ratio];
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}
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static int
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drm_subpixel_to_wayland(int drm_value)
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{
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switch (drm_value) {
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default:
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case DRM_MODE_SUBPIXEL_UNKNOWN:
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return WL_OUTPUT_SUBPIXEL_UNKNOWN;
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case DRM_MODE_SUBPIXEL_NONE:
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return WL_OUTPUT_SUBPIXEL_NONE;
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case DRM_MODE_SUBPIXEL_HORIZONTAL_RGB:
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return WL_OUTPUT_SUBPIXEL_HORIZONTAL_RGB;
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case DRM_MODE_SUBPIXEL_HORIZONTAL_BGR:
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return WL_OUTPUT_SUBPIXEL_HORIZONTAL_BGR;
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case DRM_MODE_SUBPIXEL_VERTICAL_RGB:
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return WL_OUTPUT_SUBPIXEL_VERTICAL_RGB;
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case DRM_MODE_SUBPIXEL_VERTICAL_BGR:
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return WL_OUTPUT_SUBPIXEL_VERTICAL_BGR;
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}
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}
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int
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drm_mode_ensure_blob(struct drm_backend *backend, struct drm_mode *mode)
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{
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int ret;
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if (mode->blob_id)
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return 0;
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ret = drmModeCreatePropertyBlob(backend->drm.fd,
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&mode->mode_info,
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sizeof(mode->mode_info),
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&mode->blob_id);
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if (ret != 0)
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weston_log("failed to create mode property blob: %s\n",
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strerror(errno));
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drm_debug(backend, "\t\t\t[atomic] created new mode blob %lu for %s\n",
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(unsigned long) mode->blob_id, mode->mode_info.name);
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return ret;
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}
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static bool
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check_non_desktop(struct drm_connector *connector, drmModeObjectPropertiesPtr props)
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{
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struct drm_property_info *non_desktop_info =
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&connector->props[WDRM_CONNECTOR_NON_DESKTOP];
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return drm_property_get_value(non_desktop_info, props, 0);
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}
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static uint32_t
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get_panel_orientation(struct drm_connector *connector, drmModeObjectPropertiesPtr props)
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{
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struct drm_property_info *orientation =
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&connector->props[WDRM_CONNECTOR_PANEL_ORIENTATION];
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uint64_t kms_val =
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drm_property_get_value(orientation, props,
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WDRM_PANEL_ORIENTATION_NORMAL);
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switch (kms_val) {
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case WDRM_PANEL_ORIENTATION_NORMAL:
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return WL_OUTPUT_TRANSFORM_NORMAL;
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case WDRM_PANEL_ORIENTATION_UPSIDE_DOWN:
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return WL_OUTPUT_TRANSFORM_180;
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case WDRM_PANEL_ORIENTATION_LEFT_SIDE_UP:
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return WL_OUTPUT_TRANSFORM_90;
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case WDRM_PANEL_ORIENTATION_RIGHT_SIDE_UP:
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return WL_OUTPUT_TRANSFORM_270;
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default:
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assert(!"unknown property value in get_panel_orientation");
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}
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}
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static int
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parse_modeline(const char *s, drmModeModeInfo *mode)
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{
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char hsync[16];
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char vsync[16];
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float fclock;
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memset(mode, 0, sizeof *mode);
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mode->type = DRM_MODE_TYPE_USERDEF;
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mode->hskew = 0;
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mode->vscan = 0;
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mode->vrefresh = 0;
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mode->flags = 0;
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if (sscanf(s, "%f %hd %hd %hd %hd %hd %hd %hd %hd %15s %15s",
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&fclock,
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&mode->hdisplay,
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&mode->hsync_start,
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&mode->hsync_end,
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&mode->htotal,
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&mode->vdisplay,
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&mode->vsync_start,
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&mode->vsync_end,
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&mode->vtotal, hsync, vsync) != 11)
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return -1;
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mode->clock = fclock * 1000;
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if (strcasecmp(hsync, "+hsync") == 0)
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mode->flags |= DRM_MODE_FLAG_PHSYNC;
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else if (strcasecmp(hsync, "-hsync") == 0)
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mode->flags |= DRM_MODE_FLAG_NHSYNC;
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else
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return -1;
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if (strcasecmp(vsync, "+vsync") == 0)
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mode->flags |= DRM_MODE_FLAG_PVSYNC;
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else if (strcasecmp(vsync, "-vsync") == 0)
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mode->flags |= DRM_MODE_FLAG_NVSYNC;
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else
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return -1;
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snprintf(mode->name, sizeof mode->name, "%dx%d@%.3f",
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mode->hdisplay, mode->vdisplay, fclock);
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return 0;
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}
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static void
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edid_parse_string(const uint8_t *data, char text[])
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{
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int i;
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int replaced = 0;
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/* this is always 12 bytes, but we can't guarantee it's null
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* terminated or not junk. */
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strncpy(text, (const char *) data, 12);
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/* guarantee our new string is null-terminated */
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text[12] = '\0';
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/* remove insane chars */
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for (i = 0; text[i] != '\0'; i++) {
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if (text[i] == '\n' ||
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text[i] == '\r') {
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text[i] = '\0';
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break;
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}
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}
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/* ensure string is printable */
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for (i = 0; text[i] != '\0'; i++) {
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if (!isprint(text[i])) {
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text[i] = '-';
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replaced++;
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}
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}
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/* if the string is random junk, ignore the string */
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if (replaced > 4)
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text[0] = '\0';
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}
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#define EDID_DESCRIPTOR_ALPHANUMERIC_DATA_STRING 0xfe
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#define EDID_DESCRIPTOR_DISPLAY_PRODUCT_NAME 0xfc
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#define EDID_DESCRIPTOR_DISPLAY_PRODUCT_SERIAL_NUMBER 0xff
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#define EDID_OFFSET_DATA_BLOCKS 0x36
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#define EDID_OFFSET_LAST_BLOCK 0x6c
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#define EDID_OFFSET_PNPID 0x08
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#define EDID_OFFSET_SERIAL 0x0c
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static int
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edid_parse(struct drm_edid *edid, const uint8_t *data, size_t length)
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{
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int i;
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uint32_t serial_number;
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/* check header */
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if (length < 128)
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return -1;
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if (data[0] != 0x00 || data[1] != 0xff)
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return -1;
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/* decode the PNP ID from three 5 bit words packed into 2 bytes
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* /--08--\/--09--\
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* 7654321076543210
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* |\---/\---/\---/
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* R C1 C2 C3 */
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edid->pnp_id[0] = 'A' + ((data[EDID_OFFSET_PNPID + 0] & 0x7c) / 4) - 1;
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edid->pnp_id[1] = 'A' + ((data[EDID_OFFSET_PNPID + 0] & 0x3) * 8) + ((data[EDID_OFFSET_PNPID + 1] & 0xe0) / 32) - 1;
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edid->pnp_id[2] = 'A' + (data[EDID_OFFSET_PNPID + 1] & 0x1f) - 1;
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edid->pnp_id[3] = '\0';
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/* maybe there isn't a ASCII serial number descriptor, so use this instead */
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serial_number = (uint32_t) data[EDID_OFFSET_SERIAL + 0];
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serial_number += (uint32_t) data[EDID_OFFSET_SERIAL + 1] * 0x100;
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serial_number += (uint32_t) data[EDID_OFFSET_SERIAL + 2] * 0x10000;
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serial_number += (uint32_t) data[EDID_OFFSET_SERIAL + 3] * 0x1000000;
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if (serial_number > 0)
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sprintf(edid->serial_number, "%lu", (unsigned long) serial_number);
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/* parse EDID data */
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for (i = EDID_OFFSET_DATA_BLOCKS;
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i <= EDID_OFFSET_LAST_BLOCK;
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i += 18) {
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/* ignore pixel clock data */
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if (data[i] != 0)
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continue;
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if (data[i+2] != 0)
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continue;
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/* any useful blocks? */
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if (data[i+3] == EDID_DESCRIPTOR_DISPLAY_PRODUCT_NAME) {
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edid_parse_string(&data[i+5],
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edid->monitor_name);
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} else if (data[i+3] == EDID_DESCRIPTOR_DISPLAY_PRODUCT_SERIAL_NUMBER) {
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edid_parse_string(&data[i+5],
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edid->serial_number);
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} else if (data[i+3] == EDID_DESCRIPTOR_ALPHANUMERIC_DATA_STRING) {
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edid_parse_string(&data[i+5],
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edid->eisa_id);
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}
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}
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return 0;
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}
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/** Parse monitor make, model and serial from EDID
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*
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* \param head The head whose \c drm_edid to fill in.
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* \param props The DRM connector properties to get the EDID from.
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* \param[out] make The monitor make (PNP ID).
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* \param[out] model The monitor model (name).
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* \param[out] serial_number The monitor serial number.
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*
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* Each of \c *make, \c *model and \c *serial_number are set only if the
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* information is found in the EDID. The pointers they are set to must not
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* be free()'d explicitly, instead they get implicitly freed when the
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* \c drm_head is destroyed.
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*/
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static void
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find_and_parse_output_edid(struct drm_head *head,
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drmModeObjectPropertiesPtr props,
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const char **make,
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const char **model,
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const char **serial_number)
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{
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drmModePropertyBlobPtr edid_blob = NULL;
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uint32_t blob_id;
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int rc;
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blob_id =
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drm_property_get_value(
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&head->connector.props[WDRM_CONNECTOR_EDID],
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props, 0);
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if (!blob_id)
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return;
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edid_blob = drmModeGetPropertyBlob(head->backend->drm.fd, blob_id);
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if (!edid_blob)
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return;
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rc = edid_parse(&head->edid,
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edid_blob->data,
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edid_blob->length);
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if (!rc) {
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if (head->edid.pnp_id[0] != '\0')
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*make = head->edid.pnp_id;
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if (head->edid.monitor_name[0] != '\0')
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*model = head->edid.monitor_name;
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if (head->edid.serial_number[0] != '\0')
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*serial_number = head->edid.serial_number;
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}
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drmModeFreePropertyBlob(edid_blob);
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}
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static uint32_t
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drm_refresh_rate_mHz(const drmModeModeInfo *info)
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{
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uint64_t refresh;
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/* Calculate higher precision (mHz) refresh rate */
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refresh = (info->clock * 1000000LL / info->htotal +
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info->vtotal / 2) / info->vtotal;
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if (info->flags & DRM_MODE_FLAG_INTERLACE)
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refresh *= 2;
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if (info->flags & DRM_MODE_FLAG_DBLSCAN)
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refresh /= 2;
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if (info->vscan > 1)
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refresh /= info->vscan;
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return refresh;
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}
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/**
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* Add a mode to output's mode list
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*
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* Copy the supplied DRM mode into a Weston mode structure, and add it to the
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* output's mode list.
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*
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* @param output DRM output to add mode to
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* @param info DRM mode structure to add
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* @returns Newly-allocated Weston/DRM mode structure
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*/
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static struct drm_mode *
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drm_output_add_mode(struct drm_output *output, const drmModeModeInfo *info)
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{
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struct drm_mode *mode;
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mode = malloc(sizeof *mode);
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if (mode == NULL)
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return NULL;
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mode->base.flags = 0;
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mode->base.width = info->hdisplay;
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mode->base.height = info->vdisplay;
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mode->base.refresh = drm_refresh_rate_mHz(info);
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mode->mode_info = *info;
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mode->blob_id = 0;
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if (info->type & DRM_MODE_TYPE_PREFERRED)
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mode->base.flags |= WL_OUTPUT_MODE_PREFERRED;
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mode->base.aspect_ratio = drm_to_weston_mode_aspect_ratio(info->flags);
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wl_list_insert(output->base.mode_list.prev, &mode->base.link);
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return mode;
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}
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/**
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* Destroys a mode, and removes it from the list.
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*/
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static void
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drm_output_destroy_mode(struct drm_backend *backend, struct drm_mode *mode)
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{
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if (mode->blob_id)
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drmModeDestroyPropertyBlob(backend->drm.fd, mode->blob_id);
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wl_list_remove(&mode->base.link);
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free(mode);
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}
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/** Destroy a list of drm_modes
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*
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* @param backend The backend for releasing mode property blobs.
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* @param mode_list The list linked by drm_mode::base.link.
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*/
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void
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drm_mode_list_destroy(struct drm_backend *backend, struct wl_list *mode_list)
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{
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struct drm_mode *mode, *next;
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wl_list_for_each_safe(mode, next, mode_list, base.link)
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drm_output_destroy_mode(backend, mode);
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}
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void
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drm_output_print_modes(struct drm_output *output)
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{
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struct weston_mode *m;
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struct drm_mode *dm;
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const char *aspect_ratio;
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wl_list_for_each(m, &output->base.mode_list, link) {
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dm = to_drm_mode(m);
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aspect_ratio = aspect_ratio_to_string(m->aspect_ratio);
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weston_log_continue(STAMP_SPACE "%dx%d@%.1f%s%s%s, %.1f MHz\n",
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m->width, m->height, m->refresh / 1000.0,
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aspect_ratio,
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m->flags & WL_OUTPUT_MODE_PREFERRED ?
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", preferred" : "",
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m->flags & WL_OUTPUT_MODE_CURRENT ?
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", current" : "",
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dm->mode_info.clock / 1000.0);
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}
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}
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/**
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* Find the closest-matching mode for a given target
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*
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* Given a target mode, find the most suitable mode amongst the output's
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* current mode list to use, preferring the current mode if possible, to
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* avoid an expensive mode switch.
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*
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* @param output DRM output
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* @param target_mode Mode to attempt to match
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* @returns Pointer to a mode from the output's mode list
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*/
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struct drm_mode *
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drm_output_choose_mode(struct drm_output *output,
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struct weston_mode *target_mode)
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{
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struct drm_mode *tmp_mode = NULL, *mode_fall_back = NULL, *mode;
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enum weston_mode_aspect_ratio src_aspect = WESTON_MODE_PIC_AR_NONE;
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enum weston_mode_aspect_ratio target_aspect = WESTON_MODE_PIC_AR_NONE;
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struct drm_backend *b;
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b = to_drm_backend(output->base.compositor);
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target_aspect = target_mode->aspect_ratio;
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src_aspect = output->base.current_mode->aspect_ratio;
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if (output->base.current_mode->width == target_mode->width &&
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output->base.current_mode->height == target_mode->height &&
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(output->base.current_mode->refresh == target_mode->refresh ||
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target_mode->refresh == 0)) {
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if (!b->aspect_ratio_supported || src_aspect == target_aspect)
|
|
return to_drm_mode(output->base.current_mode);
|
|
}
|
|
|
|
wl_list_for_each(mode, &output->base.mode_list, base.link) {
|
|
|
|
src_aspect = mode->base.aspect_ratio;
|
|
if (mode->mode_info.hdisplay == target_mode->width &&
|
|
mode->mode_info.vdisplay == target_mode->height) {
|
|
if (mode->base.refresh == target_mode->refresh ||
|
|
target_mode->refresh == 0) {
|
|
if (!b->aspect_ratio_supported ||
|
|
src_aspect == target_aspect)
|
|
return mode;
|
|
else if (!mode_fall_back)
|
|
mode_fall_back = mode;
|
|
} else if (!tmp_mode) {
|
|
tmp_mode = mode;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (mode_fall_back)
|
|
return mode_fall_back;
|
|
|
|
return tmp_mode;
|
|
}
|
|
|
|
void
|
|
update_head_from_connector(struct drm_head *head)
|
|
{
|
|
struct drm_connector *connector = &head->connector;
|
|
drmModeObjectProperties *props = connector->props_drm;
|
|
drmModeConnector *conn = connector->conn;
|
|
const char *make = "unknown";
|
|
const char *model = "unknown";
|
|
const char *serial_number = "unknown";
|
|
|
|
find_and_parse_output_edid(head, props, &make, &model, &serial_number);
|
|
weston_head_set_monitor_strings(&head->base, make, model, serial_number);
|
|
weston_head_set_non_desktop(&head->base,
|
|
check_non_desktop(connector, props));
|
|
weston_head_set_subpixel(&head->base,
|
|
drm_subpixel_to_wayland(conn->subpixel));
|
|
|
|
weston_head_set_physical_size(&head->base, conn->mmWidth, conn->mmHeight);
|
|
|
|
weston_head_set_transform(&head->base,
|
|
get_panel_orientation(connector, props));
|
|
|
|
/* Unknown connection status is assumed disconnected. */
|
|
weston_head_set_connection_status(&head->base,
|
|
conn->connection == DRM_MODE_CONNECTED);
|
|
}
|
|
|
|
/**
|
|
* Choose suitable mode for an output
|
|
*
|
|
* Find the most suitable mode to use for initial setup (or reconfiguration on
|
|
* hotplug etc) for a DRM output.
|
|
*
|
|
* @param backend the DRM backend
|
|
* @param output DRM output to choose mode for
|
|
* @param mode Strategy and preference to use when choosing mode
|
|
* @param modeline Manually-entered mode (may be NULL)
|
|
* @param current_mode Mode currently being displayed on this output
|
|
* @returns A mode from the output's mode list, or NULL if none available
|
|
*/
|
|
static struct drm_mode *
|
|
drm_output_choose_initial_mode(struct drm_backend *backend,
|
|
struct drm_output *output,
|
|
enum weston_drm_backend_output_mode mode,
|
|
const char *modeline,
|
|
const drmModeModeInfo *current_mode)
|
|
{
|
|
struct drm_mode *preferred = NULL;
|
|
struct drm_mode *current = NULL;
|
|
struct drm_mode *configured = NULL;
|
|
struct drm_mode *config_fall_back = NULL;
|
|
struct drm_mode *best = NULL;
|
|
struct drm_mode *drm_mode;
|
|
drmModeModeInfo drm_modeline;
|
|
int32_t width = 0;
|
|
int32_t height = 0;
|
|
uint32_t refresh = 0;
|
|
uint32_t aspect_width = 0;
|
|
uint32_t aspect_height = 0;
|
|
enum weston_mode_aspect_ratio aspect_ratio = WESTON_MODE_PIC_AR_NONE;
|
|
int n;
|
|
|
|
if (mode == WESTON_DRM_BACKEND_OUTPUT_PREFERRED && modeline) {
|
|
n = sscanf(modeline, "%dx%d@%d %u:%u", &width, &height,
|
|
&refresh, &aspect_width, &aspect_height);
|
|
if (backend->aspect_ratio_supported && n == 5) {
|
|
if (aspect_width == 4 && aspect_height == 3)
|
|
aspect_ratio = WESTON_MODE_PIC_AR_4_3;
|
|
else if (aspect_width == 16 && aspect_height == 9)
|
|
aspect_ratio = WESTON_MODE_PIC_AR_16_9;
|
|
else if (aspect_width == 64 && aspect_height == 27)
|
|
aspect_ratio = WESTON_MODE_PIC_AR_64_27;
|
|
else if (aspect_width == 256 && aspect_height == 135)
|
|
aspect_ratio = WESTON_MODE_PIC_AR_256_135;
|
|
else
|
|
weston_log("Invalid modeline \"%s\" for output %s\n",
|
|
modeline, output->base.name);
|
|
}
|
|
if (n != 2 && n != 3 && n != 5) {
|
|
width = -1;
|
|
|
|
if (parse_modeline(modeline, &drm_modeline) == 0) {
|
|
configured = drm_output_add_mode(output, &drm_modeline);
|
|
if (!configured)
|
|
return NULL;
|
|
} else {
|
|
weston_log("Invalid modeline \"%s\" for output %s\n",
|
|
modeline, output->base.name);
|
|
}
|
|
}
|
|
}
|
|
|
|
wl_list_for_each_reverse(drm_mode, &output->base.mode_list, base.link) {
|
|
if (width == drm_mode->base.width &&
|
|
height == drm_mode->base.height &&
|
|
(refresh == 0 || refresh == drm_mode->mode_info.vrefresh)) {
|
|
if (!backend->aspect_ratio_supported ||
|
|
aspect_ratio == drm_mode->base.aspect_ratio)
|
|
configured = drm_mode;
|
|
else
|
|
config_fall_back = drm_mode;
|
|
}
|
|
|
|
if (memcmp(current_mode, &drm_mode->mode_info,
|
|
sizeof *current_mode) == 0)
|
|
current = drm_mode;
|
|
|
|
if (drm_mode->base.flags & WL_OUTPUT_MODE_PREFERRED)
|
|
preferred = drm_mode;
|
|
|
|
best = drm_mode;
|
|
}
|
|
|
|
if (current == NULL && current_mode->clock != 0) {
|
|
current = drm_output_add_mode(output, current_mode);
|
|
if (!current)
|
|
return NULL;
|
|
}
|
|
|
|
if (mode == WESTON_DRM_BACKEND_OUTPUT_CURRENT)
|
|
configured = current;
|
|
|
|
if (configured)
|
|
return configured;
|
|
|
|
if (config_fall_back)
|
|
return config_fall_back;
|
|
|
|
if (preferred)
|
|
return preferred;
|
|
|
|
if (current)
|
|
return current;
|
|
|
|
if (best)
|
|
return best;
|
|
|
|
weston_log("no available modes for %s\n", output->base.name);
|
|
return NULL;
|
|
}
|
|
|
|
static uint32_t
|
|
u32distance(uint32_t a, uint32_t b)
|
|
{
|
|
if (a < b)
|
|
return b - a;
|
|
else
|
|
return a - b;
|
|
}
|
|
|
|
/** Choose equivalent mode
|
|
*
|
|
* If the two modes are not equivalent, return NULL.
|
|
* Otherwise return the mode that is more likely to work in place of both.
|
|
*
|
|
* None of the fuzzy matching criteria in this function have any justification.
|
|
*
|
|
* typedef struct _drmModeModeInfo {
|
|
* uint32_t clock;
|
|
* uint16_t hdisplay, hsync_start, hsync_end, htotal, hskew;
|
|
* uint16_t vdisplay, vsync_start, vsync_end, vtotal, vscan;
|
|
*
|
|
* uint32_t vrefresh;
|
|
*
|
|
* uint32_t flags;
|
|
* uint32_t type;
|
|
* char name[DRM_DISPLAY_MODE_LEN];
|
|
* } drmModeModeInfo, *drmModeModeInfoPtr;
|
|
*/
|
|
static const drmModeModeInfo *
|
|
drm_mode_pick_equivalent(const drmModeModeInfo *a, const drmModeModeInfo *b)
|
|
{
|
|
uint32_t refresh_a, refresh_b;
|
|
|
|
if (a->hdisplay != b->hdisplay || a->vdisplay != b->vdisplay)
|
|
return NULL;
|
|
|
|
if (a->flags != b->flags)
|
|
return NULL;
|
|
|
|
/* kHz */
|
|
if (u32distance(a->clock, b->clock) > 500)
|
|
return NULL;
|
|
|
|
refresh_a = drm_refresh_rate_mHz(a);
|
|
refresh_b = drm_refresh_rate_mHz(b);
|
|
if (u32distance(refresh_a, refresh_b) > 50)
|
|
return NULL;
|
|
|
|
if ((a->type ^ b->type) & DRM_MODE_TYPE_PREFERRED) {
|
|
if (a->type & DRM_MODE_TYPE_PREFERRED)
|
|
return a;
|
|
else
|
|
return b;
|
|
}
|
|
|
|
return a;
|
|
}
|
|
|
|
/* If the given mode info is not already in the list, add it.
|
|
* If it is in the list, either keep the existing or replace it,
|
|
* depending on which one is "better".
|
|
*/
|
|
static int
|
|
drm_output_try_add_mode(struct drm_output *output, const drmModeModeInfo *info)
|
|
{
|
|
struct weston_mode *base;
|
|
struct drm_mode *mode = NULL;
|
|
struct drm_backend *backend;
|
|
const drmModeModeInfo *chosen = NULL;
|
|
|
|
assert(info);
|
|
|
|
wl_list_for_each(base, &output->base.mode_list, link) {
|
|
mode = to_drm_mode(base);
|
|
chosen = drm_mode_pick_equivalent(&mode->mode_info, info);
|
|
if (chosen)
|
|
break;
|
|
}
|
|
|
|
if (chosen == info) {
|
|
assert(mode);
|
|
backend = to_drm_backend(output->base.compositor);
|
|
drm_output_destroy_mode(backend, mode);
|
|
chosen = NULL;
|
|
}
|
|
|
|
if (!chosen) {
|
|
mode = drm_output_add_mode(output, info);
|
|
if (!mode)
|
|
return -1;
|
|
}
|
|
/* else { the equivalent mode is already in the list } */
|
|
|
|
return 0;
|
|
}
|
|
|
|
/** Rewrite the output's mode list
|
|
*
|
|
* @param output The output.
|
|
* @return 0 on success, -1 on failure.
|
|
*
|
|
* Destroy all existing modes in the list, and reconstruct a new list from
|
|
* scratch, based on the currently attached heads.
|
|
*
|
|
* On failure the output's mode list may contain some modes.
|
|
*/
|
|
static int
|
|
drm_output_update_modelist_from_heads(struct drm_output *output)
|
|
{
|
|
struct drm_backend *backend = to_drm_backend(output->base.compositor);
|
|
struct weston_head *head_base;
|
|
struct drm_head *head;
|
|
drmModeConnector *conn;
|
|
int i;
|
|
int ret;
|
|
|
|
assert(!output->base.enabled);
|
|
|
|
drm_mode_list_destroy(backend, &output->base.mode_list);
|
|
|
|
wl_list_for_each(head_base, &output->base.head_list, output_link) {
|
|
head = to_drm_head(head_base);
|
|
conn = head->connector.conn;
|
|
for (i = 0; i < conn->count_modes; i++) {
|
|
ret = drm_output_try_add_mode(output, &conn->modes[i]);
|
|
if (ret < 0)
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
drm_output_set_mode(struct weston_output *base,
|
|
enum weston_drm_backend_output_mode mode,
|
|
const char *modeline)
|
|
{
|
|
struct drm_output *output = to_drm_output(base);
|
|
struct drm_backend *b = to_drm_backend(base->compositor);
|
|
struct drm_head *head = to_drm_head(weston_output_get_first_head(base));
|
|
|
|
struct drm_mode *current;
|
|
|
|
if (output->virtual)
|
|
return -1;
|
|
|
|
if (drm_output_update_modelist_from_heads(output) < 0)
|
|
return -1;
|
|
|
|
current = drm_output_choose_initial_mode(b, output, mode, modeline,
|
|
&head->inherited_mode);
|
|
if (!current)
|
|
return -1;
|
|
|
|
output->base.current_mode = ¤t->base;
|
|
output->base.current_mode->flags |= WL_OUTPUT_MODE_CURRENT;
|
|
|
|
/* Set native_ fields, so weston_output_mode_switch_to_native() works */
|
|
output->base.native_mode = output->base.current_mode;
|
|
output->base.native_scale = output->base.current_scale;
|
|
|
|
return 0;
|
|
}
|
|
|