1/*
  2 * Copyright (C) STMicroelectronics SA 2014
  3 * Author: Vincent Abriou <vincent.abriou@st.com> for STMicroelectronics.
  4 * License terms:  GNU General Public License (GPL), version 2
  5 */
  6
  7#ifndef _STI_HDMI_H_
  8#define _STI_HDMI_H_
  9
 10#include <linux/hdmi.h>
 11#include <linux/platform_device.h>
 12
 13#include <drm/drmP.h>
 14
 15#define HDMI_STA           0x0010
 16#define HDMI_STA_DLL_LCK   BIT(5)
 17#define HDMI_STA_HOT_PLUG  BIT(4)
 18
 19struct sti_hdmi;
 20
 21struct hdmi_phy_ops {
 22	bool (*start)(struct sti_hdmi *hdmi);
 23	void (*stop)(struct sti_hdmi *hdmi);
 24};
 25
 26struct hdmi_audio_params {
 27	bool enabled;
 28	unsigned int sample_width;
 29	unsigned int sample_rate;
 30	struct hdmi_audio_infoframe cea;
 31};
 32
 33/* values for the framing mode property */
 34enum sti_hdmi_modes {
 35	HDMI_MODE_HDMI,
 36	HDMI_MODE_DVI,
 37};
 38
 39static const struct drm_prop_enum_list hdmi_mode_names[] = {
 40	{ HDMI_MODE_HDMI, "hdmi" },
 41	{ HDMI_MODE_DVI, "dvi" },
 42};
 43
 44#define DEFAULT_HDMI_MODE HDMI_MODE_HDMI
 45
 46static const struct drm_prop_enum_list colorspace_mode_names[] = {
 47	{ HDMI_COLORSPACE_RGB, "rgb" },
 48	{ HDMI_COLORSPACE_YUV422, "yuv422" },
 49	{ HDMI_COLORSPACE_YUV444, "yuv444" },
 50};
 51
 52#define DEFAULT_COLORSPACE_MODE HDMI_COLORSPACE_RGB
 53
 54/**
 55 * STI hdmi structure
 56 *
 57 * @dev: driver device
 58 * @drm_dev: pointer to drm device
 59 * @mode: current display mode selected
 60 * @regs: hdmi register
 61 * @syscfg: syscfg register for pll rejection configuration
 62 * @clk_pix: hdmi pixel clock
 63 * @clk_tmds: hdmi tmds clock
 64 * @clk_phy: hdmi phy clock
 65 * @clk_audio: hdmi audio clock
 66 * @irq: hdmi interrupt number
 67 * @irq_status: interrupt status register
 68 * @phy_ops: phy start/stop operations
 69 * @enabled: true if hdmi is enabled else false
 70 * @hpd: hot plug detect status
 71 * @wait_event: wait event
 72 * @event_received: wait event status
 73 * @reset: reset control of the hdmi phy
 74 * @ddc_adapt: i2c ddc adapter
 75 * @colorspace: current colorspace selected
 76 * @hdmi_mode: select framing for HDMI or DVI
 77 * @audio_pdev: ASoC hdmi-codec platform device
 78 * @audio: hdmi audio parameters.
 79 * @drm_connector: hdmi connector
 80 */
 81struct sti_hdmi {
 82	struct device dev;
 83	struct drm_device *drm_dev;
 84	struct drm_display_mode mode;
 85	void __iomem *regs;
 86	void __iomem *syscfg;
 87	struct clk *clk_pix;
 88	struct clk *clk_tmds;
 89	struct clk *clk_phy;
 90	struct clk *clk_audio;
 91	int irq;
 92	u32 irq_status;
 93	struct hdmi_phy_ops *phy_ops;
 94	bool enabled;
 95	bool hpd;
 96	wait_queue_head_t wait_event;
 97	bool event_received;
 98	struct reset_control *reset;
 99	struct i2c_adapter *ddc_adapt;
100	enum hdmi_colorspace colorspace;
101	enum sti_hdmi_modes hdmi_mode;
102	struct platform_device *audio_pdev;
103	struct hdmi_audio_params audio;
104	struct drm_connector *drm_connector;
105};
106
107u32 hdmi_read(struct sti_hdmi *hdmi, int offset);
108void hdmi_write(struct sti_hdmi *hdmi, u32 val, int offset);
109
110/**
111 * hdmi phy config structure
112 *
113 * A pointer to an array of these structures is passed to a TMDS (HDMI) output
114 * via the control interface to provide board and SoC specific
115 * configurations of the HDMI PHY. Each entry in the array specifies a hardware
116 * specific configuration for a given TMDS clock frequency range.
117 *
118 * @min_tmds_freq: Lower bound of TMDS clock frequency this entry applies to
119 * @max_tmds_freq: Upper bound of TMDS clock frequency this entry applies to
120 * @config: SoC specific register configuration
121 */
122struct hdmi_phy_config {
123	u32 min_tmds_freq;
124	u32 max_tmds_freq;
125	u32 config[4];
126};
127
128#endif