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-rw-r--r--backend/drm/drm.c1
-rw-r--r--backend/drm/util.c19
-rw-r--r--include/backend/drm/util.h1
3 files changed, 21 insertions, 0 deletions
diff --git a/backend/drm/drm.c b/backend/drm/drm.c
index d113aa12..3b14c63e 100644
--- a/backend/drm/drm.c
+++ b/backend/drm/drm.c
@@ -760,6 +760,7 @@ static struct wlr_drm_mode *drm_mode_create(const drmModeModeInfo *modeinfo) {
mode->wlr_mode.width = mode->drm_mode.hdisplay;
mode->wlr_mode.height = mode->drm_mode.vdisplay;
mode->wlr_mode.refresh = calculate_refresh_rate(modeinfo);
+ mode->wlr_mode.picture_aspect_ratio = get_picture_aspect_ratio(modeinfo);
if (modeinfo->type & DRM_MODE_TYPE_PREFERRED) {
mode->wlr_mode.preferred = true;
}
diff --git a/backend/drm/util.c b/backend/drm/util.c
index 2083e617..3f460317 100644
--- a/backend/drm/util.c
+++ b/backend/drm/util.c
@@ -30,6 +30,25 @@ int32_t calculate_refresh_rate(const drmModeModeInfo *mode) {
return refresh;
}
+enum wlr_output_mode_aspect_ratio get_picture_aspect_ratio(const drmModeModeInfo *mode) {
+ switch (mode->flags & DRM_MODE_FLAG_PIC_AR_MASK) {
+ case DRM_MODE_FLAG_PIC_AR_NONE:
+ return WLR_OUTPUT_MODE_ASPECT_RATIO_NONE;
+ case DRM_MODE_FLAG_PIC_AR_4_3:
+ return WLR_OUTPUT_MODE_ASPECT_RATIO_4_3;
+ case DRM_MODE_FLAG_PIC_AR_16_9:
+ return WLR_OUTPUT_MODE_ASPECT_RATIO_16_9;
+ case DRM_MODE_FLAG_PIC_AR_64_27:
+ return WLR_OUTPUT_MODE_ASPECT_RATIO_64_27;
+ case DRM_MODE_FLAG_PIC_AR_256_135:
+ return WLR_OUTPUT_MODE_ASPECT_RATIO_256_135;
+ default:
+ wlr_log(WLR_ERROR, "Unknown mode picture aspect ratio: %u",
+ mode->flags & DRM_MODE_FLAG_PIC_AR_MASK);
+ return WLR_OUTPUT_MODE_ASPECT_RATIO_NONE;
+ }
+}
+
static const char *get_manufacturer(struct udev_hwdb *hwdb, uint16_t code) {
static char pnp_id[4];
diff --git a/include/backend/drm/util.h b/include/backend/drm/util.h
index fc632e12..0d4c3d74 100644
--- a/include/backend/drm/util.h
+++ b/include/backend/drm/util.h
@@ -9,6 +9,7 @@ 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);
// 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);