89 lines
2.3 KiB
C
89 lines
2.3 KiB
C
/*
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* Copyright (C) STMicroelectronics SA 2014
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* Author: Vincent Abriou <vincent.abriou@st.com> for STMicroelectronics.
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* License terms: GNU General Public License (GPL), version 2
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*/
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#ifndef _STI_HDMI_H_
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#define _STI_HDMI_H_
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#include <linux/platform_device.h>
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#include <drm/drmP.h>
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#define HDMI_STA 0x0010
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#define HDMI_STA_DLL_LCK BIT(5)
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struct sti_hdmi;
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struct hdmi_phy_ops {
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bool (*start)(struct sti_hdmi *hdmi);
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void (*stop)(struct sti_hdmi *hdmi);
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};
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/**
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* STI hdmi structure
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*
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* @dev: driver device
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* @drm_dev: pointer to drm device
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* @mode: current display mode selected
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* @regs: hdmi register
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* @syscfg: syscfg register for pll rejection configuration
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* @clk_pix: hdmi pixel clock
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* @clk_tmds: hdmi tmds clock
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* @clk_phy: hdmi phy clock
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* @clk_audio: hdmi audio clock
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* @irq: hdmi interrupt number
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* @irq_status: interrupt status register
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* @phy_ops: phy start/stop operations
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* @enabled: true if hdmi is enabled else false
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* @hpd_gpio: hdmi hot plug detect gpio number
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* @hpd: hot plug detect status
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* @wait_event: wait event
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* @event_received: wait event status
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* @reset: reset control of the hdmi phy
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*/
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struct sti_hdmi {
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struct device dev;
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struct drm_device *drm_dev;
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struct drm_display_mode mode;
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void __iomem *regs;
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void __iomem *syscfg;
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struct clk *clk_pix;
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struct clk *clk_tmds;
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struct clk *clk_phy;
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struct clk *clk_audio;
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int irq;
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u32 irq_status;
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struct hdmi_phy_ops *phy_ops;
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bool enabled;
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int hpd_gpio;
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bool hpd;
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wait_queue_head_t wait_event;
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bool event_received;
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struct reset_control *reset;
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};
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u32 hdmi_read(struct sti_hdmi *hdmi, int offset);
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void hdmi_write(struct sti_hdmi *hdmi, u32 val, int offset);
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/**
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* hdmi phy config structure
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*
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* A pointer to an array of these structures is passed to a TMDS (HDMI) output
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* via the control interface to provide board and SoC specific
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* configurations of the HDMI PHY. Each entry in the array specifies a hardware
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* specific configuration for a given TMDS clock frequency range.
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*
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* @min_tmds_freq: Lower bound of TMDS clock frequency this entry applies to
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* @max_tmds_freq: Upper bound of TMDS clock frequency this entry applies to
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* @config: SoC specific register configuration
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*/
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struct hdmi_phy_config {
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u32 min_tmds_freq;
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u32 max_tmds_freq;
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u32 config[4];
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};
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#endif
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