fishHEADmaster

1 files changed, 96 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_dp.c b/drivers/gpu/drm/nouveau/nouveau_dp.c
new file mode 100644
index 0000000..36fd225
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_dp.c
@@ -0,0 +1,96 @@
+/*
+ * Copyright 2009 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Ben Skeggs
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_dp_helper.h>
+
+#include "nouveau_drm.h"
+#include "nouveau_connector.h"
+#include "nouveau_encoder.h"
+#include "nouveau_crtc.h"
+
+#include <core/class.h>
+
+#include <subdev/gpio.h>
+#include <subdev/i2c.h>
+
+static void
+nouveau_dp_probe_oui(struct drm_device *dev, struct nouveau_i2c_port *auxch,
+		     u8 *dpcd)
+{
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	u8 buf[3];
+
+	if (!(dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT))
+		return;
+
+	if (!nv_rdaux(auxch, DP_SINK_OUI, buf, 3))
+		NV_DEBUG(drm, "Sink OUI: %02hx%02hx%02hx\n",
+			     buf[0], buf[1], buf[2]);
+
+	if (!nv_rdaux(auxch, DP_BRANCH_OUI, buf, 3))
+		NV_DEBUG(drm, "Branch OUI: %02hx%02hx%02hx\n",
+			     buf[0], buf[1], buf[2]);
+
+}
+
+bool
+nouveau_dp_detect(struct drm_encoder *encoder)
+{
+	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
+	struct drm_device *dev = encoder->dev;
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	struct nouveau_i2c_port *auxch;
+	u8 *dpcd = nv_encoder->dp.dpcd;
+	int ret;
+
+	auxch = nv_encoder->i2c;
+	if (!auxch)
+		return false;
+
+	ret = nv_rdaux(auxch, DP_DPCD_REV, dpcd, 8);
+	if (ret)
+		return false;
+
+	nv_encoder->dp.link_bw = 27000 * dpcd[1];
+	nv_encoder->dp.link_nr = dpcd[2] & DP_MAX_LANE_COUNT_MASK;
+
+	NV_DEBUG(drm, "display: %dx%d dpcd 0x%02x\n",
+		     nv_encoder->dp.link_nr, nv_encoder->dp.link_bw, dpcd[0]);
+	NV_DEBUG(drm, "encoder: %dx%d\n",
+		     nv_encoder->dcb->dpconf.link_nr,
+		     nv_encoder->dcb->dpconf.link_bw);
+
+	if (nv_encoder->dcb->dpconf.link_nr < nv_encoder->dp.link_nr)
+		nv_encoder->dp.link_nr = nv_encoder->dcb->dpconf.link_nr;
+	if (nv_encoder->dcb->dpconf.link_bw < nv_encoder->dp.link_bw)
+		nv_encoder->dp.link_bw = nv_encoder->dcb->dpconf.link_bw;
+
+	NV_DEBUG(drm, "maximum: %dx%d\n",
+		     nv_encoder->dp.link_nr, nv_encoder->dp.link_bw);
+
+	nouveau_dp_probe_oui(dev, auxch, dpcd);
+
+	return true;
+}