drm: document drm_display_info
We seem to have a bit a mess in how to describe the bus formats, with a multitude of competing ways. Might be best to consolidate it all and use MEDIA_BUS_FMT_ also for the hdmi color formats and high color modes. Also move all the display_info related functions into drm_connector.c (there's only one) to group it all together. I did decided against also moving the edid related display info functions, they seem to fit better in drm_edid.c. Instead sprinkle a few cross references around. While at that reduce the kerneldoc for static functions, there's not point in documenting internals with that much detail really. v2: Fix typo and move misplaced hunk (Sean). Cc: Sean Paul <seanpaul@chromium.org> Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1471034937-651-19-git-send-email-daniel.vetter@ffwll.ch
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Daniel Vetter
parent
4644453747
commit
b3c6c8bfe3
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@ -506,6 +506,40 @@ static const struct drm_prop_enum_list drm_dpms_enum_list[] = {
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};
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DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
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/**
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* drm_display_info_set_bus_formats - set the supported bus formats
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* @info: display info to store bus formats in
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* @formats: array containing the supported bus formats
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* @num_formats: the number of entries in the fmts array
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*
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* Store the supported bus formats in display info structure.
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* See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for
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* a full list of available formats.
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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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u32 *fmts = NULL;
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if (!formats && num_formats)
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return -EINVAL;
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if (formats && num_formats) {
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fmts = kmemdup(formats, sizeof(*formats) * num_formats,
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GFP_KERNEL);
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if (!fmts)
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return -ENOMEM;
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}
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kfree(info->bus_formats);
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info->bus_formats = fmts;
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info->num_bus_formats = num_formats;
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return 0;
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}
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EXPORT_SYMBOL(drm_display_info_set_bus_formats);
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/* Optional connector properties. */
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static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = {
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{ DRM_MODE_SCALE_NONE, "None" },
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@ -419,40 +419,6 @@ void drm_crtc_cleanup(struct drm_crtc *crtc)
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}
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EXPORT_SYMBOL(drm_crtc_cleanup);
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/**
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* drm_display_info_set_bus_formats - set the supported bus formats
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* @info: display info to store bus formats in
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* @formats: array containing the supported bus formats
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* @num_formats: the number of entries in the fmts array
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*
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* Store the supported bus formats in display info structure.
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* See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for
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* a full list of available formats.
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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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u32 *fmts = NULL;
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if (!formats && num_formats)
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return -EINVAL;
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if (formats && num_formats) {
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fmts = kmemdup(formats, sizeof(*formats) * num_formats,
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GFP_KERNEL);
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if (!fmts)
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return -ENOMEM;
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}
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kfree(info->bus_formats);
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info->bus_formats = fmts;
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info->num_bus_formats = num_formats;
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return 0;
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}
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EXPORT_SYMBOL(drm_display_info_set_bus_formats);
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static int drm_encoder_register_all(struct drm_device *dev)
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{
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struct drm_encoder *encoder;
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@ -3721,14 +3721,7 @@ bool drm_rgb_quant_range_selectable(struct edid *edid)
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}
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EXPORT_SYMBOL(drm_rgb_quant_range_selectable);
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/**
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* drm_assign_hdmi_deep_color_info - detect whether monitor supports
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* hdmi deep color modes and update drm_display_info if so.
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* @edid: monitor EDID information
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* @info: Updated with maximum supported deep color bpc and color format
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* if deep color supported.
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* @connector: DRM connector, used only for debug output
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*
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/*
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* Parse the CEA extension according to CEA-861-B.
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* Return true if HDMI deep color supported, false if not or unknown.
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*/
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@ -3822,16 +3815,6 @@ static bool drm_assign_hdmi_deep_color_info(struct edid *edid,
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return false;
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}
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/**
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* drm_add_display_info - pull display info out if present
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* @edid: EDID data
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* @info: display info (attached to connector)
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* @connector: connector whose edid is used to build display info
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*
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* Grab any available display info and stuff it into the drm_display_info
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* structure that's part of the connector. Useful for tracking bpp and
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* color spaces.
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*/
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static void drm_add_display_info(struct edid *edid,
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struct drm_display_info *info,
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struct drm_connector *connector)
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@ -4052,7 +4035,9 @@ static int add_displayid_detailed_modes(struct drm_connector *connector,
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* @connector: connector we're probing
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* @edid: EDID data
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*
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* Add the specified modes to the connector's mode list.
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* Add the specified modes to the connector's mode list. Also fills out the
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* &drm_display_info structure in @connector with any information which can be
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* derived from the edid.
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*
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* Return: The number of modes added or 0 if we couldn't find any.
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*/
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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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* struct drm_connector_state - mutable connector state
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* @connector: backpointer to the connector
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@ -2208,10 +2208,6 @@ extern void drm_mode_config_init(struct drm_device *dev);
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extern void drm_mode_config_reset(struct drm_device *dev);
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extern void drm_mode_config_cleanup(struct drm_device *dev);
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extern 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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static inline bool drm_property_type_is(struct drm_property *property,
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uint32_t type)
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{
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