1/* SPDX-License-Identifier: GPL-2.0 */
  2/*
  3 * Copyright (C) STMicroelectronics SA 2014
  4 * Author: Vincent Abriou <vincent.abriou@st.com> for STMicroelectronics.
  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 <media/cec-notifier.h>
 14
 15#include <drm/drm_modes.h>
 16#include <drm/drm_property.h>
 17
 18#define HDMI_STA           0x0010
 19#define HDMI_STA_DLL_LCK   BIT(5)
 20#define HDMI_STA_HOT_PLUG  BIT(4)
 21
 22struct sti_hdmi;
 23
 24struct hdmi_phy_ops {
 25	bool (*start)(struct sti_hdmi *hdmi);
 26	void (*stop)(struct sti_hdmi *hdmi);
 27};
 28
 29struct hdmi_audio_params {
 30	bool enabled;
 31	unsigned int sample_width;
 32	unsigned int sample_rate;
 33	struct hdmi_audio_infoframe cea;
 34};
 35
 36static const struct drm_prop_enum_list colorspace_mode_names[] = {
 37	{ HDMI_COLORSPACE_RGB, "rgb" },
 38	{ HDMI_COLORSPACE_YUV422, "yuv422" },
 39	{ HDMI_COLORSPACE_YUV444, "yuv444" },
 40};
 41
 42#define DEFAULT_COLORSPACE_MODE HDMI_COLORSPACE_RGB
 43
 44/**
 45 * STI hdmi structure
 46 *
 47 * @dev: driver device
 48 * @drm_dev: pointer to drm device
 49 * @mode: current display mode selected
 50 * @regs: hdmi register
 51 * @syscfg: syscfg register for pll rejection configuration
 52 * @clk_pix: hdmi pixel clock
 53 * @clk_tmds: hdmi tmds clock
 54 * @clk_phy: hdmi phy clock
 55 * @clk_audio: hdmi audio clock
 56 * @irq: hdmi interrupt number
 57 * @irq_status: interrupt status register
 58 * @phy_ops: phy start/stop operations
 59 * @enabled: true if hdmi is enabled else false
 60 * @hpd: hot plug detect status
 61 * @wait_event: wait event
 62 * @event_received: wait event status
 63 * @reset: reset control of the hdmi phy
 64 * @ddc_adapt: i2c ddc adapter
 65 * @colorspace: current colorspace selected
 66 * @hdmi_monitor: true if HDMI monitor detected else DVI monitor assumed
 67 * @audio_pdev: ASoC hdmi-codec platform device
 68 * @audio: hdmi audio parameters.
 69 * @drm_connector: hdmi connector
 70 * @notifier: hotplug detect notifier
 71 */
 72struct sti_hdmi {
 73	struct device dev;
 74	struct drm_device *drm_dev;
 75	struct drm_display_mode mode;
 76	void __iomem *regs;
 77	void __iomem *syscfg;
 78	struct clk *clk_pix;
 79	struct clk *clk_tmds;
 80	struct clk *clk_phy;
 81	struct clk *clk_audio;
 82	int irq;
 83	u32 irq_status;
 84	struct hdmi_phy_ops *phy_ops;
 85	bool enabled;
 86	bool hpd;
 87	wait_queue_head_t wait_event;
 88	bool event_received;
 89	struct reset_control *reset;
 90	struct i2c_adapter *ddc_adapt;
 91	enum hdmi_colorspace colorspace;
 92	bool hdmi_monitor;
 93	struct platform_device *audio_pdev;
 94	struct hdmi_audio_params audio;
 95	struct drm_connector *drm_connector;
 96	struct cec_notifier *notifier;
 97};
 98
 99u32 hdmi_read(struct sti_hdmi *hdmi, int offset);
100void hdmi_write(struct sti_hdmi *hdmi, u32 val, int offset);
101
102/**
103 * hdmi phy config structure
104 *
105 * A pointer to an array of these structures is passed to a TMDS (HDMI) output
106 * via the control interface to provide board and SoC specific
107 * configurations of the HDMI PHY. Each entry in the array specifies a hardware
108 * specific configuration for a given TMDS clock frequency range.
109 *
110 * @min_tmds_freq: Lower bound of TMDS clock frequency this entry applies to
111 * @max_tmds_freq: Upper bound of TMDS clock frequency this entry applies to
112 * @config: SoC specific register configuration
113 */
114struct hdmi_phy_config {
115	u32 min_tmds_freq;
116	u32 max_tmds_freq;
117	u32 config[4];
118};
119
120#endif