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 19 struct sti_hdmi; 20 21 struct hdmi_phy_ops { 22 bool (*start)(struct sti_hdmi *hdmi); 23 void (*stop)(struct sti_hdmi *hdmi); 24 }; 25 26 struct 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 */ 34 enum sti_hdmi_modes { 35 HDMI_MODE_HDMI, 36 HDMI_MODE_DVI, 37 }; 38 39 static 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 46 static 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 */ 81 struct 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 }; 106 107 u32 hdmi_read(struct sti_hdmi *hdmi, int offset); 108 void 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 */ 122 struct hdmi_phy_config { 123 u32 min_tmds_freq; 124 u32 max_tmds_freq; 125 u32 config[4]; 126 }; 127 128 #endif 129