video: add display-core

Signed-off-by: Tomasz Figa <t.figa@samsung.com>

1 files changed, 230 insertions, 0 deletions

diff --git a/include/video/display.h b/include/video/display.h
new file mode 100644
index 00000000000..11d7032b7a6
--- /dev/null
+++ b/include/video/display.h
@@ -0,0 +1,230 @@
+/*
+ * Display Core
+ *
+ * Copyright (C) 2012 Renesas Solutions Corp.
+ *
+ * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __DISPLAY_H__
+#define __DISPLAY_H__
+
+#include <linux/kref.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <video/omapdss.h>
+
+struct display_entity;
+struct video_source;
+struct videomode;
+
+/* -----------------------------------------------------------------------------
+ * Display Entity
+ */
+
+/* Hack to get the first registered display entity */
+struct display_entity *display_entity_get_first(void);
+
+enum display_entity_state {
+	DISPLAY_ENTITY_STATE_OFF,
+	DISPLAY_ENTITY_STATE_STANDBY,
+	DISPLAY_ENTITY_STATE_ON,
+};
+
+enum display_entity_interface_type {
+	DISPLAY_ENTITY_INTERFACE_DPI,
+	DISPLAY_ENTITY_INTERFACE_DSI,
+};
+
+#define DSI_MODE_VIDEO			(1 << 0)
+#define DSI_MODE_VIDEO_BURST		(1 << 1)
+#define DSI_MODE_VIDEO_SYNC_PULSE	(1 << 2)
+#define DSI_MODE_VIDEO_AUTO_VERT	(1 << 3)
+#define DSI_MODE_VIDEO_HSE		(1 << 4)
+#define DSI_MODE_VIDEO_HFP		(1 << 5)
+#define DSI_MODE_VIDEO_HBP		(1 << 6)
+#define DSI_MODE_VIDEO_HSA		(1 << 7)
+#define DSI_MODE_VSYNC_FLUSH		(1 << 8)
+#define DSI_MODE_EOT_PACKET		(1 << 9)
+
+enum mipi_dsi_pixel_format {
+	DSI_FMT_RGB888,
+	DSI_FMT_RGB666,
+	DSI_FMT_RGB666_PACKED,
+	DSI_FMT_RGB565,
+};
+
+struct mipi_dsi_interface_params {
+	enum mipi_dsi_pixel_format format;
+	unsigned long mode;
+	unsigned long hs_clk_freq;
+	unsigned long esc_clk_freq;
+	unsigned char data_lanes;
+	unsigned char cmd_allow;
+};
+
+struct display_entity_interface_params {
+	enum display_entity_interface_type type;
+	union {
+		struct mipi_dsi_interface_params dsi;
+	} p;
+};
+
+struct display_entity_control_ops {
+	int (*set_state)(struct display_entity *ent,
+			 enum display_entity_state state);
+	int (*update)(struct display_entity *ent,
+			void (*callback)(int, void *), void *data);
+	int (*get_modes)(struct display_entity *ent,
+			 const struct videomode **modes);
+	int (*get_params)(struct display_entity *ent,
+			  struct display_entity_interface_params *params);
+	int (*get_size)(struct display_entity *ent,
+			unsigned int *width, unsigned int *height);
+};
+
+struct display_entity {
+	struct list_head list;
+	struct device *dev;
+	struct device_node *of_node;
+	struct module *owner;
+	struct kref ref;
+
+	const char *src_name;
+	int src_id;
+	struct video_source *source;
+
+	const struct display_entity_control_ops *ops;
+
+	void(*release)(struct display_entity *ent);
+
+	enum display_entity_state state;
+};
+
+int display_entity_set_state(struct display_entity *entity,
+			     enum display_entity_state state);
+int display_entity_get_params(struct display_entity *entity,
+			      struct display_entity_interface_params *params);
+int display_entity_get_modes(struct display_entity *entity,
+			     const struct videomode **modes);
+int display_entity_get_size(struct display_entity *entity,
+			    unsigned int *width, unsigned int *height);
+
+struct display_entity *display_entity_get(struct display_entity *entity);
+void display_entity_put(struct display_entity *entity);
+
+int __must_check __display_entity_register(struct display_entity *entity,
+					   struct module *owner);
+void display_entity_unregister(struct display_entity *entity);
+
+#define display_entity_register(display_entity) \
+	__display_entity_register(display_entity, THIS_MODULE)
+
+
+/* -----------------------------------------------------------------------------
+ * Video Source
+ */
+
+enum video_source_stream_state {
+	DISPLAY_ENTITY_STREAM_STOPPED,
+	DISPLAY_ENTITY_STREAM_CONTINUOUS,
+};
+
+struct common_video_source_ops {
+	int (*set_stream)(struct video_source *src,
+			 enum video_source_stream_state state);
+	int (*bind)(struct video_source *src, struct display_entity *sink);
+	int (*unbind)(struct video_source *src, struct display_entity *sink);
+};
+
+struct dpi_video_source_ops {
+	int (*set_videomode)(struct video_source *src,
+			const struct videomode *vm);
+	int (*set_data_lines)(struct video_source *src, int lines);
+};
+
+struct dsi_video_source_ops {
+	/* enable/disable dsi bus */
+	int (*enable)(struct video_source *src);
+	int (*disable)(struct video_source *src);
+
+	/* bus configuration */
+	int (*configure_pins)(struct video_source *src,
+			const struct omap_dsi_pin_config *pins);
+	int (*set_clocks)(struct video_source *src,
+			unsigned long ddr_clk,
+			unsigned long lp_clk);
+	/* NOTE: Do we really need configure_pins and set_clocks here? */
+
+	void (*enable_hs)(struct video_source *src, bool enable);
+
+	/* data transfer */
+	int (*dcs_write)(struct video_source *src, int channel,
+			const u8 *data, size_t len);
+	int (*dcs_read)(struct video_source *src, int channel, u8 dcs_cmd,
+			u8 *data, size_t len);
+	/* NOTE: Do we need more write and read types? */
+
+	int (*update)(struct video_source *src, int channel,
+			void (*callback)(int, void *), void *data);
+};
+
+struct dvi_video_source_ops {
+	int (*set_videomode)(struct video_source *src,
+			const struct videomode *vm);
+};
+
+struct video_source {
+	struct list_head list;
+	struct device *dev;
+	struct device_node *of_node;
+	struct module *owner;
+	struct kref ref;
+
+	struct display_entity *sink;
+
+	const char *name;
+	int id;
+
+	const struct common_video_source_ops *common_ops;
+
+	union {
+		const struct dpi_video_source_ops *dpi;
+		const struct dsi_video_source_ops *dsi;
+		const struct dvi_video_source_ops *dvi;
+	} ops;
+
+	void(*release)(struct video_source *src);
+};
+
+static inline int dsi_dcs_write(struct video_source *src, int channel,
+						const u8 *data, size_t len)
+{
+	if (!src->ops.dsi || !src->ops.dsi->dcs_write)
+		return -EINVAL;
+
+	return src->ops.dsi->dcs_write(src, channel, data, len);
+}
+
+static inline int dsi_dcs_read(struct video_source *src, int channel,
+					u8 dcs_cmd, u8 *data, size_t len)
+{
+	if (!src->ops.dsi || !src->ops.dsi->dcs_read)
+		return -EINVAL;
+
+	return src->ops.dsi->dcs_read(src, channel, dcs_cmd, data, len);
+}
+
+
+#define video_source_register(video_source) \
+	__video_source_register(video_source, THIS_MODULE)
+
+int __must_check __video_source_register(struct video_source *entity,
+							struct module *owner);
+void video_source_unregister(struct video_source *entity);
+
+#endif /* __DISPLAY_H__ */