drivers/gpu/drm/sti/sti_hdmi.h

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