gralloc: hdmi cloned mode support

Patch implements simple support for cloned mode hdmi by introducing
primary and hdmi outputs that are updated respectively.

Current implementation is rather naive and assumes hdmi can drive
same mode as the local lvds. Only cloned mode is supported but can be
extended later to support extended mode when hwcomposer is available
for controlling this behaviour.

HDMI hotplug is implemented as a separate observer thread that
listens to uevents and reads hdmi connection state from there, this
requires switch support from the kernel hdmi driver.

Change-Id: I1d5873214d672563789f4953a892de60539eca88
Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Signed-off-by: Matt Gumbel <matthew.k.gumbel@linux.intel.com>

1 files changed, 24 insertions, 5 deletions

diff --git a/gralloc_drm_priv.h b/gralloc_drm_priv.h
index d22fea0..a6dad10 100644
--- a/gralloc_drm_priv.h
+++ b/gralloc_drm_priv.h
@@ -37,10 +37,26 @@ enum drm_swap_mode {
 	DRM_SWAP_SETCRTC,
 };
 
+enum hdmi_output_mode {
+	HDMI_CLONED,
+	HDMI_EXTENDED,
+};
+
 struct gralloc_drm_plane_t {
 	drmModePlane *drm_plane;
 };
 
+struct gralloc_drm_output
+{
+	uint32_t crtc_id;
+	uint32_t connector_id;
+	drmModeModeInfo mode;
+	int xdpi, ydpi;
+	int fb_format;
+	int bpp;
+	uint32_t active;
+};
+
 struct gralloc_drm_t {
 	/* initialized by gralloc_drm_create */
 	int fd;
@@ -48,16 +64,19 @@ struct gralloc_drm_t {
 
 	/* initialized by gralloc_drm_init_kms */
 	drmModeResPtr resources;
-	uint32_t crtc_id;
-	uint32_t connector_id;
-	drmModeModeInfo mode;
-	int xdpi, ydpi;
+	struct gralloc_drm_output primary;
+	struct gralloc_drm_output hdmi;
+	enum hdmi_output_mode hdmi_mode;
+
+	/* hdmi hotplug */
+	pthread_mutex_t hdmi_mutex;
+	pthread_t hdmi_hotplug_thread;
+
 #ifdef DRM_MODE_FEATURE_DIRTYFB
 	drmModeClip clip;
 #endif
 
 	/* initialized by drv->init_kms_features */
-	int fb_format;
 	enum drm_swap_mode swap_mode;
 	int swap_interval;
 	int mode_quirk_vmwgfx;