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-rw-r--r--src/blueshift_drm_c.c131
1 files changed, 81 insertions, 50 deletions
diff --git a/src/blueshift_drm_c.c b/src/blueshift_drm_c.c
index 8258899..9955dbb 100644
--- a/src/blueshift_drm_c.c
+++ b/src/blueshift_drm_c.c
@@ -48,6 +48,11 @@ typedef struct _card_connection
*/
drmModeRes* res;
+ /**
+ * Resources for open connectors
+ */
+ drmModeConnector** connectors;
+
} card_connection;
@@ -82,12 +87,6 @@ static long card_connection_reuse_ptr = 0;
static long card_connection_reuse_size = 0;
-/**
- * Connector information
- */
-static drmModeConnector* connector = NULL;
-
-
/**
* Free all resources, but your need to close all connections first
@@ -143,7 +142,7 @@ int blueshift_drm_open_card(int card_index)
{
long maxlen = strlen(DRM_DIR_NAME) + strlen(DRM_DEV_NAME) + 10;
char* pathname = alloca(maxlen * sizeof(char));
- int drm_fd;
+ int fd;
int rc;
sprintf(pathname, DRM_DEV_NAME, DRM_DIR_NAME, card_index);
@@ -166,8 +165,9 @@ int blueshift_drm_open_card(int card_index)
rc = card_connection_ptr++;
}
- *(card_connections + rc).fd = fd;
- *(card_connections + rc).res = NULL;
+ (card_connections + rc)->fd = fd;
+ (card_connections + rc)->res = NULL;
+ (card_connections + rc)->connectors = NULL;
return rc;
}
@@ -270,7 +270,6 @@ int blueshift_drm_gamma_size(int connection, int crtc_index)
int blueshift_drm_get_gamma_ramps(int connection, int crtc_index, int gamma_size, uint16_t* red, uint16_t* green, uint16_t* blue)
{
card_connection* card = card_connections + connection;
- int i;
/* We need to initialise it to avoid valgrind warnings */
memset(red, 0, gamma_size * sizeof(uint16_t));
@@ -304,55 +303,69 @@ int blueshift_drm_set_gamma_ramps(int connection, int crtc_index, int gamma_size
/**
* Acquire information about a connector
*
+ * @param connection The identifier for the connection to the card
* @param connector_index The index of the connector
*/
-void blueshift_drm_open_connector(int connector_index)
+void blueshift_drm_open_connector(int connection, int connector_index)
{
- connector = drmModeGetConnector(drm_fd, *(drm_res->connectors + connector_index));
+ card_connection* card = card_connections + connection;
+
+ if (card->connectors == NULL)
+ card->connectors = malloc(card->res->count_connectors * sizeof(drmModeConnector*));
+ *(card->connectors + connector_index) = drmModeGetConnector(card->fd, *(card->res->connectors + connector_index));
}
/**
- * Release information about the connector
+ * Release information about a connector
+ *
+ * @param connection The identifier for the connection to the card
+ * @param connector_index The index of the connector
*/
-void blueshift_drm_close_connector()
+void blueshift_drm_close_connector(int connection, int connector_index)
{
- drmModeFreeConnector(connector);
+ drmModeFreeConnector(*((card_connections + connection)->connectors + connector_index));
}
/**
- * Get the physical width the monitor connected to the connector
+ * Get the physical width the monitor connected to a connector
*
- * @return The physical width of the monitor in millimetres, 0 if unknown or not connected
+ * @param connection The identifier for the connection to the card
+ * @param connector_index The index of the connector
+ * @return The physical width of the monitor in millimetres, 0 if unknown or not connected
*/
-int blueshift_drm_get_width()
+int blueshift_drm_get_width(int connection, int connector_index)
{
/* Accurate dimension on area not covered by the edges */
- return connector->mmWidth;
+ return (card_connections + connection)->connectors[connector_index]->mmWidth;
}
/**
- * Get the physical height the monitor connected to the connector
+ * Get the physical height the monitor connected to a connector
*
- * @return The physical height of the monitor in millimetres, 0 if unknown or not connected
+ * @param connection The identifier for the connection to the card
+ * @param connector_index The index of the connector
+ * @return The physical height of the monitor in millimetres, 0 if unknown or not connected
*/
-int blueshift_drm_get_height()
+int blueshift_drm_get_height(int connection, int connector_index)
{
/* Accurate dimension on area not covered by the edges */
- return connector->mmHeight;
+ return (card_connections + connection)->connectors[connector_index]->mmHeight;
}
/**
* Get whether a monitor is connected to a connector
*
- * @return 1 if there is a connection, 0 otherwise, -1 if unknown
+ * @param connection The identifier for the connection to the card
+ * @param connector_index The index of the connector
+ * @return 1 if there is a connection, 0 otherwise, -1 if unknown
*/
-int blueshift_drm_is_connected()
+int blueshift_drm_is_connected(int connection, int connector_index)
{
- switch (connector->connection)
+ switch ((card_connections + connection)->connectors[connector_index]->connection)
{
case DRM_MODE_CONNECTED:
return 1;
@@ -366,20 +379,26 @@ int blueshift_drm_is_connected()
/**
- * Get the index of the CRTC of the monitor connected to the connector
+ * Get the index of the CRTC of the monitor connected to a connector
*
- * @return The index of the CRTC
+ * @param connection The identifier for the connection to the card
+ * @param connector_index The index of the connector
+ * @return The index of the CRTC
*/
-int blueshift_drm_get_crtc()
+int blueshift_drm_get_crtc(int connection, int connector_index)
{
- drmModeEncoder* encoder = drmModeGetEncoder(drm_fd, connector->encoder_id);
+ card_connection* card = card_connections + connection;
+ drmModeEncoder* encoder = drmModeGetEncoder(card->fd, card->connectors[connector_index]->encoder_id);
uint32_t crtc_id = encoder->crtc_id;
+ drmModeRes* res = card->res;
int crtc;
+ int n;
drmModeFreeEncoder(encoder);
- for (crtc = 0; crtc < drm_res->count_crtcs; crtc++)
- if (*(drm_res->crtcs + crtc) == crtc_id)
+ n = res->count_crtcs;
+ for (crtc = 0; crtc < n; crtc++)
+ if (*(res->crtcs + crtc) == crtc_id)
return crtc;
return -1;
@@ -387,51 +406,62 @@ int blueshift_drm_get_crtc()
/**
- * Get the index of the type of the connector
+ * Get the index of the type of a connector
*
- * @return The connector type by index, 0 for unknown
+ * @param connection The identifier for the connection to the card
+ * @param connector_index The index of the connector
+ * @return The connector type by index, 0 for unknown
*/
-int blueshift_drm_get_connector_type_index()
+int blueshift_drm_get_connector_type_index(int connection, int connector_index)
{
- return connector->connector_type;
+ return (card_connections + connection)->connectors[connector_index]->connector_type;
}
/**
- * Get the name of the type of the connector
+ * Get the name of the type of a connector
*
- * @return The connector type by name, "Unknown" if not identifiable,
- * "Unrecognised" if Blueshift does not recognise it.
+ * @param connection The identifier for the connection to the card
+ * @param connector_index The index of the connector
+ * @return The connector type by name, "Unknown" if not identifiable,
+ * "Unrecognised" if Blueshift does not recognise it.
*/
-const char* blueshift_drm_get_connector_type_name()
+const char* blueshift_drm_get_connector_type_name(int connection, int connector_index)
{
static const char* TYPE_NAMES[] = {
"Unknown", "VGA", "DVII", "DVID", "DVIA", "Composite", "SVIDEO", "LVDS", "Component",
"9PinDIN", "DisplayPort", "HDMIA", "HDMIB", "TV", "eDP", "VIRTUAL", "DSI"};
- int type = connector->connector_type;
+ int type = ((card_connections + connection)->connectors[connector_index])->connector_type;
return (size_t)type < sizeof(TYPE_NAMES) / sizeof(char*) ? TYPE_NAMES[type] : "Unrecognised";
}
/**
- * Get the extended display identification data for the monitor connected to the connector
+ * Get the extended display identification data for the monitor connected to a connector
*
- * @param edid Storage location for the EDID, it should be 128 bytes, 256 bytes + zero termination if hex
- * @param size The size allocated to `edid` excluding your zero termination
- * @param hex Whether to convert to hexadecimal representation, this is preferable
- * @return The length of the found value, 0 if none, as if hex is false
+ * @param connection The identifier for the connection to the card
+ * @param connector_index The index of the connector
+ * @param edid Storage location for the EDID, it should be 128 bytes, 256 bytes + zero termination if hex
+ * @param size The size allocated to `edid` excluding your zero termination
+ * @param hex Whether to convert to hexadecimal representation, this is preferable
+ * @return The length of the found value, 0 if none, as if hex is false
*/
-long blueshift_drm_get_edid(char* edid, long size, int hex)
+long blueshift_drm_get_edid(int connection, int connector_index, char* edid, long size, int hex)
{
+ card_connection* card = card_connections + connection;
+ drmModeConnector* connector = *(card->connectors + connector_index);
+ int fd = card->fd;
long rc = 0;
+ int prop_n = connector->count_props;
int prop_i;
- for (prop_i = 0; prop_i < connector->count_props; prop_i++)
+
+ for (prop_i = 0; prop_i < prop_n; prop_i++)
{
- drmModePropertyRes* prop = drmModeGetProperty(drm_fd, connector->props[prop_i]);
+ drmModePropertyRes* prop = drmModeGetProperty(fd, connector->props[prop_i]);
if (!strcmp("EDID", prop->name))
{
- drmModePropertyBlobRes* blob = drmModeGetPropertyBlob(drm_fd, connector->prop_values[prop_i]);
+ drmModePropertyBlobRes* blob = drmModeGetPropertyBlob(fd, connector->prop_values[prop_i]);
if (hex)
{
rc += blob->length;
@@ -452,6 +482,7 @@ long blueshift_drm_get_edid(char* edid, long size, int hex)
}
drmModeFreeProperty(prop);
}
+
return rc;
}