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vc_dispmanx_display_open: allow display to be set with VC_DISPLAY env variable

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Allow end-users to set the default display through a VC_DISPLAY environement variable.
E.g. to force hello_teapot to display on HDMI one could execute:

VC_DISPLAY=5 ./hello_teapot.bin

Signed-off-by: Floris Bos <bos@je-eigen-domein.nl>
This commit is contained in:
Floris Bos
2015-09-20 23:09:51 +02:00
parent cc92dfd6c4
commit 01d7835642
1 changed files with 8 additions and 0 deletions
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8
interface/vmcs_host/vc_vchi_dispmanx.c
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@@ -25,6 +25,7 @@ ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/ */
#include <string.h> #include <string.h>
#include <stdlib.h>
#include "vchost_config.h" #include "vchost_config.h"
#include "vchost.h" #include "vchost.h"
@@ -510,6 +511,13 @@ VCHPRE_ int VCHPOST_ vc_dispmanx_resource_write_data_handle( DISPMANX_RESOURCE_H
***********************************************************/ ***********************************************************/
VCHPRE_ DISPMANX_DISPLAY_HANDLE_T VCHPOST_ vc_dispmanx_display_open( uint32_t device ) { VCHPRE_ DISPMANX_DISPLAY_HANDLE_T VCHPOST_ vc_dispmanx_display_open( uint32_t device ) {
uint32_t display_handle; uint32_t display_handle;
char *env = getenv("VC_DISPLAY");
if (device == 0 && env)
{
device = atoi(env);
}
device = VC_HTOV32(device); device = VC_HTOV32(device);
display_handle = dispmanx_get_handle(EDispmanDisplayOpen, display_handle = dispmanx_get_handle(EDispmanDisplayOpen,
&device, sizeof(device)); &device, sizeof(device));