From 50f8d517733d24fce6693ffae552f9833e2e6aa9 Mon Sep 17 00:00:00 2001
From: Simon Ser <contact@emersion.fr>
Date: Tue, 1 Feb 2022 14:33:34 +0100
Subject: [PATCH] xf86drmMode: introduce drmModeGetConnectorTypeName
User-space often needs to print the name of a connector type.
When a new connector type is added, all user-space programs need
to be updated to support the new connector type.
Expose a function to get a connector type name in libdrm.
The names are taken from the kernel [1].
[1]: https://cgit.freedesktop.org/drm/drm/tree/drivers/gpu/drm/drm_connector.c?h=4fc8cb47fcfdc93e274a1291757e478df4f9c39b#n83
Signed-off-by: Simon Ser <contact@emersion.fr>
---
core-symbols.txt | 1 +
xf86drmMode.c | 53 ++++++++++++++++++++++++++++++++++++++++++++++++
xf86drmMode.h | 9 ++++++++
3 files changed, 63 insertions(+)
diff --git a/core-symbols.txt b/core-symbols.txt
index 31bbcf8fd..dcf900188 100644
--- a/core-symbols.txt
+++ b/core-symbols.txt
@@ -126,6 +126,7 @@ drmModeFreePropertyBlob
drmModeFreeResources
drmModeGetConnector
drmModeGetConnectorCurrent
+drmModeGetConnectorTypeName
drmModeGetCrtc
drmModeGetEncoder
drmModeGetFB
diff --git a/xf86drmMode.c b/xf86drmMode.c
index 6b79d7682..6d636dccd 100644
--- a/xf86drmMode.c
+++ b/xf86drmMode.c
@@ -1747,3 +1747,56 @@ drm_public void drmModeFreeFB2(drmModeFB2Ptr ptr)
{
drmFree(ptr);
}
+
+drm_public const char *
+drmModeGetConnectorTypeName(uint32_t connector_type)
+{
+ /* Keep the strings in sync with the kernel's drm_connector_enum_list in
+ * drm_connector.c. */
+ switch (connector_type) {
+ case DRM_MODE_CONNECTOR_Unknown:
+ return "Unknown";
+ case DRM_MODE_CONNECTOR_VGA:
+ return "VGA";
+ case DRM_MODE_CONNECTOR_DVII:
+ return "DVI-I";
+ case DRM_MODE_CONNECTOR_DVID:
+ return "DVI-D";
+ case DRM_MODE_CONNECTOR_DVIA:
+ return "DVI-A";
+ case DRM_MODE_CONNECTOR_Composite:
+ return "Composite";
+ case DRM_MODE_CONNECTOR_SVIDEO:
+ return "SVIDEO";
+ case DRM_MODE_CONNECTOR_LVDS:
+ return "LVDS";
+ case DRM_MODE_CONNECTOR_Component:
+ return "Component";
+ case DRM_MODE_CONNECTOR_9PinDIN:
+ return "DIN";
+ case DRM_MODE_CONNECTOR_DisplayPort:
+ return "DP";
+ case DRM_MODE_CONNECTOR_HDMIA:
+ return "HDMI-A";
+ case DRM_MODE_CONNECTOR_HDMIB:
+ return "HDMI-B";
+ case DRM_MODE_CONNECTOR_TV:
+ return "TV";
+ case DRM_MODE_CONNECTOR_eDP:
+ return "eDP";
+ case DRM_MODE_CONNECTOR_VIRTUAL:
+ return "Virtual";
+ case DRM_MODE_CONNECTOR_DSI:
+ return "DSI";
+ case DRM_MODE_CONNECTOR_DPI:
+ return "DPI";
+ case DRM_MODE_CONNECTOR_WRITEBACK:
+ return "Writeback";
+ case DRM_MODE_CONNECTOR_SPI:
+ return "SPI";
+ case DRM_MODE_CONNECTOR_USB:
+ return "USB";
+ default:
+ return NULL;
+ }
+}
diff --git a/xf86drmMode.h b/xf86drmMode.h
index 085576426..46dc80a29 100644
--- a/xf86drmMode.h
+++ b/xf86drmMode.h
@@ -475,6 +475,15 @@ extern drmModeObjectListPtr drmModeGetLease(int fd);
extern int drmModeRevokeLease(int fd, uint32_t lessee_id);
+/**
+ * Get a string describing a connector type.
+ *
+ * NULL is returned if the connector type is unsupported. Callers should handle
+ * this gracefully, e.g. by falling back to "Unknown" or printing the raw value.
+ */
+extern const char *
+drmModeGetConnectorTypeName(uint32_t connector_type);
+
#if defined(__cplusplus)
}
#endif
--
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