dm: video: Add a uclass for display port

eDP (Embedded DisplayPort) is a standard widely used in laptops to drive
LCD panels. Add a uclass for this which supports a few simple operations.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Tom Warren <twarren@nvidia.com>

3 files changed, 45 insertions, 0 deletions

diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 51728b3..62af63a 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -88,3 +88,10 @@ config VIDEO_LCD_SPI_MISO
 	hardware and LCD panel id retrieval (if the panel can report it). The
 	option takes a string in the format understood by 'name_to_gpio'
 	function, e.g. PH1 for pin 1 of port H.
+
+config DISPLAY_PORT
+	bool "Enable DisplayPort support"
+	help
+	   eDP (Embedded DisplayPort) is a standard widely used in laptops
+	   to drive LCD panels. This framework provides support for enabling
+	   these displays where supported by the video hardware.
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index f64918e..2945710 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -5,6 +5,10 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
+ifdef CONFIG_DM
+obj-$(CONFIG_DISPLAY_PORT) += dp-uclass.o
+endif
+
 obj-$(CONFIG_ATI_RADEON_FB) += ati_radeon_fb.o videomodes.o
 obj-$(CONFIG_ATMEL_HLCD) += atmel_hlcdfb.o
 obj-$(CONFIG_ATMEL_LCD) += atmel_lcdfb.o
diff --git a/drivers/video/dp-uclass.c b/drivers/video/dp-uclass.c
new file mode 100644
index 0000000..17f5de9
--- /dev/null
+++ b/drivers/video/dp-uclass.c
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <displayport.h>
+#include <errno.h>
+
+int display_port_read_edid(struct udevice *dev, u8 *buf, int buf_size)
+{
+	struct dm_display_port_ops *ops = display_port_get_ops(dev);
+
+	if (!ops || !ops->read_edid)
+		return -ENOSYS;
+	return ops->read_edid(dev, buf, buf_size);
+}
+
+int display_port_enable(struct udevice *dev, int panel_bpp,
+			const struct display_timing *timing)
+{
+	struct dm_display_port_ops *ops = display_port_get_ops(dev);
+
+	if (!ops || !ops->enable)
+		return -ENOSYS;
+	return ops->enable(dev, panel_bpp, timing);
+}
+
+UCLASS_DRIVER(display_port) = {
+	.id		= UCLASS_DISPLAY_PORT,
+	.name		= "display_port",
+};