dm: video: Add support for the NXP PTN3460 bridge

This chip provides an eDP to LVDS bridge which is useful for SoCs that don't
support LVDS displays (or it would waste scarce pins). There is no setup
required by this chip, other than to adjust power-down and reset pins, and
those are managed by the uclass.

Signed-off-by: Simon Glass <sjg@chromium.org>

diff --git a/drivers/video/bridge/Kconfig b/drivers/video/bridge/Kconfig
index 589795df9f935632640b7db25926dc2711460e71..2a3b6c4beee6c2a3708bc19c78ed08039f056b68 100644 (file)
--- a/drivers/video/bridge/Kconfig
+++ b/drivers/video/bridge/Kconfig
@@ -16,3 +16,12 @@ config VIDEO_BRIDGE_PARADE_PS862X
          to be connected to an eDP output device such as an SoC that lacks
          LVDS capability, or where LVDS requires too many signals to route
          on the PCB. Setup parameters are provided in the device tree.
+
+config VIDEO_BRIDGE_NXP_PTN3460
+       bool "Support NXP PTN3460 DP->LVDS bridge"
+       depends on VIDEO_BRIDGE
+       help
+         The NXP PTN3460 is a DisplayPort-to-LVDS (Low voltage differential
+         signalling) converter. It enables an LVDS LCD panel to be connected
+         to an eDP output device such as an SoC that lacks LVDS capability,
+         or where LVDS requires too many signals to route on the PCB.

diff --git a/drivers/video/bridge/Makefile b/drivers/video/bridge/Makefile
index c7cc563729848b7d6e378186d73b3e769bc67f48..ce731fa4ca4e3c9d61d1639bf5bd54d3cfcb0182 100644 (file)
--- a/drivers/video/bridge/Makefile
+++ b/drivers/video/bridge/Makefile
@@ -6,3 +6,4 @@
 
 obj-$(CONFIG_VIDEO_BRIDGE) += video-bridge-uclass.o
 obj-$(CONFIG_VIDEO_BRIDGE_PARADE_PS862X) += ps862x.o
+obj-$(CONFIG_VIDEO_BRIDGE_NXP_PTN3460) += ptn3460.o

diff --git a/drivers/video/bridge/ptn3460.c b/drivers/video/bridge/ptn3460.c
new file mode 100644 (file)
index 0000000..2e2ae7c
--- /dev/null
+++ b/drivers/video/bridge/ptn3460.c
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2015 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <video_bridge.h>
+
+static int ptn3460_attach(struct udevice *dev)
+{
+       int ret;
+
+       debug("%s: %s\n", __func__, dev->name);
+       ret = video_bridge_set_active(dev, true);
+       if (ret)
+               return ret;
+
+       return 0;
+}
+
+struct video_bridge_ops ptn3460_ops = {
+       .attach = ptn3460_attach,
+};
+
+static const struct udevice_id ptn3460_ids[] = {
+       { .compatible = "nxp,ptn3460", },
+       { }
+};
+
+U_BOOT_DRIVER(parade_ptn3460) = {
+       .name   = "nmp_ptn3460",
+       .id     = UCLASS_VIDEO_BRIDGE,
+       .of_match = ptn3460_ids,
+       .ops    = &ptn3460_ops,
+};