drivers/gpu/drm/sti/sti_hdmi.h

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