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@@ -84,28 +84,69 @@ enum subpixel_order {
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SubPixelNone,
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};
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-/*
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- * Describes a given display (e.g. CRT or flat panel) and its limitations.
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+/**
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+ * struct drm_display_info - runtime data about the connected sink
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+ *
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+ * Describes a given display (e.g. CRT or flat panel) and its limitations. For
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+ * fixed display sinks like built-in panels there's not much difference between
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+ * this and struct &drm_connector. But for sinks with a real cable this
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+ * structure is meant to describe all the things at the other end of the cable.
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+ *
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+ * For sinks which provide an EDID this can be filled out by calling
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+ * drm_add_edid_modes().
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*/
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struct drm_display_info {
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+ /**
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+ * @name: Name of the display.
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+ */
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char name[DRM_DISPLAY_INFO_LEN];
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- /* Physical size */
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+ /**
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+ * @width_mm: Physical width in mm.
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+ */
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unsigned int width_mm;
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+ /**
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+ * @height_mm: Physical height in mm.
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+ */
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unsigned int height_mm;
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+ /**
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+ * @pixel_clock: Maximum pixel clock supported by the sink, in units of
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+ * 100Hz. This mismatches the clok in &drm_display_mode (which is in
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+ * kHZ), because that's what the EDID uses as base unit.
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+ */
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unsigned int pixel_clock;
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+ /**
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+ * @bpc: Maximum bits per color channel. Used by HDMI and DP outputs.
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+ */
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unsigned int bpc;
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+ /**
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+ * @subpixel_order: Subpixel order of LCD panels.
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+ */
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enum subpixel_order subpixel_order;
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#define DRM_COLOR_FORMAT_RGB444 (1<<0)
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#define DRM_COLOR_FORMAT_YCRCB444 (1<<1)
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#define DRM_COLOR_FORMAT_YCRCB422 (1<<2)
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+ /**
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+ * @color_formats: HDMI Color formats, selects between RGB and YCrCb
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+ * modes. Used DRM_COLOR_FORMAT\_ defines, which are _not_ the same ones
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+ * as used to describe the pixel format in framebuffers, and also don't
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+ * match the formats in @bus_formats which are shared with v4l.
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+ */
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u32 color_formats;
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+ /**
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+ * @bus_formats: Pixel data format on the wire, somewhat redundant with
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+ * @color_formats. Array of size @num_bus_formats encoded using
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+ * MEDIA_BUS_FMT\_ defines shared with v4l and media drivers.
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+ */
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const u32 *bus_formats;
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+ /**
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+ * @num_bus_formats: Size of @bus_formats array.
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+ */
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unsigned int num_bus_formats;
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#define DRM_BUS_FLAG_DE_LOW (1<<0)
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@@ -115,14 +156,28 @@ struct drm_display_info {
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/* drive data on neg. edge */
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#define DRM_BUS_FLAG_PIXDATA_NEGEDGE (1<<3)
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+ /**
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+ * @bus_flags: Additional information (like pixel signal polarity) for
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+ * the pixel data on the bus, using DRM_BUS_FLAGS\_ defines.
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+ */
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u32 bus_flags;
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- /* Mask of supported hdmi deep color modes */
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+ /**
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+ * @edid_hdmi_dc_modes: Mask of supported hdmi deep color modes. Even
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+ * more stuff redundant with @bus_formats.
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+ */
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u8 edid_hdmi_dc_modes;
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+ /**
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+ * @cea_rev: CEA revision of the HDMI sink.
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+ */
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u8 cea_rev;
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};
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+int drm_display_info_set_bus_formats(struct drm_display_info *info,
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+ const u32 *formats,
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+ unsigned int num_formats);
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+
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/**
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* struct drm_connector_state - mutable connector state
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* @connector: backpointer to the connector
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Daniel Vetter