kms: add cloning support.

We have to translate from the kernel encoder cloning to the randr
connector cloning, we do this by constructing an encoder mask per output
and an encoder cloning mask per output then comparing them.

Signed-off-by: Dave Airlie <airlied@redhat.com>

2 files changed, 93 insertions, 18 deletions

diff --git a/src/drmmode_display.c b/src/drmmode_display.c
index 86adfeb..d78a82a 100644
--- a/src/drmmode_display.c
+++ b/src/drmmode_display.c
@@ -618,8 +618,12 @@ drmmode_output_destroy(xf86OutputPtr output)
 	if (drmmode_output->edid_blob)
 		drmModeFreePropertyBlob(drmmode_output->edid_blob);
 	for (i = 0; i < drmmode_output->num_props; i++) {
-	    drmModeFreeProperty(drmmode_output->props[i].mode_prop);
-	    xfree(drmmode_output->props[i].atoms);
+		drmModeFreeProperty(drmmode_output->props[i].mode_prop);
+		xfree(drmmode_output->props[i].atoms);
+	}
+	for (i = 0; i < drmmode_output->mode_output->count_encoders; i++) {
+		drmModeFreeEncoder(drmmode_output->mode_encoders[i]);
+		xfree(drmmode_output->mode_encoders);
 	}
 	xfree(drmmode_output->props);
 	drmModeFreeConnector(drmmode_output->mode_output);
@@ -847,7 +851,7 @@ drmmode_output_init(ScrnInfoPtr pScrn, drmmode_ptr drmmode, int num)
 {
 	xf86OutputPtr output;
 	drmModeConnectorPtr koutput;
-	drmModeEncoderPtr kencoder;
+	drmModeEncoderPtr *kencoders = NULL;
 	drmmode_output_private_ptr drmmode_output;
 	drmModePropertyPtr props;
 	char name[32];
@@ -857,10 +861,16 @@ drmmode_output_init(ScrnInfoPtr pScrn, drmmode_ptr drmmode, int num)
 	if (!koutput)
 		return;
 
-	kencoder = drmModeGetEncoder(drmmode->fd, koutput->encoders[0]);
-	if (!kencoder) {
-		drmModeFreeConnector(koutput);
-		return;
+	kencoders = xcalloc(sizeof(drmModeEncoderPtr), koutput->count_encoders);
+	if (!kencoders) {
+		goto out_free_encoders;
+	}
+		
+	for (i = 0; i < koutput->count_encoders; i++) {
+		kencoders[i] = drmModeGetEncoder(drmmode->fd, koutput->encoders[i]);
+		if (!kencoders[i]) {
+			goto out_free_encoders;
+		}
 	}
 
 	/* need to do smart conversion here for compat with non-kms ATI driver */
@@ -884,31 +894,31 @@ drmmode_output_init(ScrnInfoPtr pScrn, drmmode_ptr drmmode, int num)
 
 	output = xf86OutputCreate (pScrn, &drmmode_output_funcs, name);
 	if (!output) {
-		drmModeFreeEncoder(kencoder);
-		drmModeFreeConnector(koutput);
-		return;
+		goto out_free_encoders;
 	}
 
 	drmmode_output = xcalloc(sizeof(drmmode_output_private_rec), 1);
 	if (!drmmode_output) {
 		xf86OutputDestroy(output);
-		drmModeFreeConnector(koutput);
-		drmModeFreeEncoder(kencoder);
-		return;
+		goto out_free_encoders;
 	}
 
 	drmmode_output->output_id = drmmode->mode_res->connectors[num];
 	drmmode_output->mode_output = koutput;
-	drmmode_output->mode_encoder = kencoder;
+	drmmode_output->mode_encoders = kencoders;
 	drmmode_output->drmmode = drmmode;
 	output->mm_width = koutput->mmWidth;
 	output->mm_height = koutput->mmHeight;
 
 	output->subpixel_order = subpixel_conv_table[koutput->subpixel];
 	output->driver_private = drmmode_output;
-
-	output->possible_crtcs = kencoder->possible_crtcs;
-	output->possible_clones = kencoder->possible_clones;
+	
+	output->possible_crtcs = 0xf;
+	for (i = 0; i < koutput->count_encoders; i++) {
+		output->possible_crtcs &= kencoders[i]->possible_crtcs;
+	}
+	/* work out the possible clones later */
+	output->possible_clones = 0;
 
 	for (i = 0; i < koutput->count_props; i++) {
 		props = drmModeGetProperty(drmmode->fd, koutput->props[i]);
@@ -923,6 +933,66 @@ drmmode_output_init(ScrnInfoPtr pScrn, drmmode_ptr drmmode, int num)
 	}
 
 	return;
+out_free_encoders:
+	if (kencoders){
+		for (i = 0; i < koutput->count_encoders; i++)
+			drmModeFreeEncoder(kencoders[i]);
+		xfree(kencoders);
+	}
+	drmModeFreeConnector(koutput);
+	
+}
+
+uint32_t find_clones(ScrnInfoPtr scrn, xf86OutputPtr output)
+{
+	drmmode_output_private_ptr drmmode_output = output->driver_private, clone_drmout;
+	int i;
+	xf86OutputPtr clone_output;
+	xf86CrtcConfigPtr   xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
+	int index_mask = 0;
+
+	for (i = 0; i < xf86_config->num_output; i++) {
+		clone_output = xf86_config->output[i];
+		clone_drmout = clone_output->driver_private;
+		if (output == clone_output)
+			continue;
+		
+		if (drmmode_output->enc_clone_mask == clone_drmout->enc_mask)
+			index_mask |= (1 << i);
+	}
+	return index_mask;
+}
+
+
+static void
+drmmode_clones_init(ScrnInfoPtr scrn, drmmode_ptr drmmode)
+{
+	int i, j;
+	xf86CrtcConfigPtr   xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
+
+	for (i = 0; i < xf86_config->num_output; i++) {
+		xf86OutputPtr output = xf86_config->output[i];
+		drmmode_output_private_ptr drmmode_output;
+
+		drmmode_output = output->driver_private;
+		drmmode_output->enc_clone_mask = 0xff;
+		/* and all the possible encoder clones for this output together */
+		for (j = 0; j < drmmode_output->mode_output->count_encoders; j++)
+		{
+			int k;
+			for (k = 0; k < drmmode->mode_res->count_encoders; k++) {
+				if (drmmode->mode_res->encoders[k] == drmmode_output->mode_encoders[j]->encoder_id)
+					drmmode_output->enc_mask |= (1 << k);
+			}
+
+			drmmode_output->enc_clone_mask &= drmmode_output->mode_encoders[j]->possible_clones;
+		}
+	}
+
+	for (i = 0; i < xf86_config->num_output; i++) {
+		xf86OutputPtr output = xf86_config->output[i];
+		output->possible_clones = find_clones(scrn, output);
+	}
 }
 
 static Bool
@@ -1081,6 +1151,9 @@ Bool drmmode_pre_init(ScrnInfoPtr pScrn, drmmode_ptr drmmode, char *busId, char
 		if (zaphod_mask & (1 << i))
 			drmmode_output_init(pScrn, drmmode, i);
 
+	/* workout clones */
+	drmmode_clones_init(pScrn, drmmode);
+
 	xf86InitialConfiguration(pScrn, TRUE);
 
 	return TRUE;
diff --git a/src/drmmode_display.h b/src/drmmode_display.h
index 1410afe..371ad18 100644
--- a/src/drmmode_display.h
+++ b/src/drmmode_display.h
@@ -64,11 +64,13 @@ typedef struct {
     drmmode_ptr drmmode;
     int output_id;
     drmModeConnectorPtr mode_output;
-    drmModeEncoderPtr mode_encoder;
+    drmModeEncoderPtr *mode_encoders;
     drmModePropertyBlobPtr edid_blob;
     int dpms_enum_id;
     int num_props;
     drmmode_prop_ptr props;
+    int enc_mask;
+    int enc_clone_mask;
 } drmmode_output_private_rec, *drmmode_output_private_ptr;