[Intel-gfx] [PATCH 19/20] drm: docume drm_display_info
Sean Paul
seanpaul at chromium.org
Wed Aug 10 15:18:48 UTC 2016
On Tue, Aug 9, 2016 at 9:41 AM, Daniel Vetter <daniel.vetter at ffwll.ch> wrote:
> 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.
>
> Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
> ---
> drivers/gpu/drm/drm_connector.c | 34 ++++++++++++++++++
> drivers/gpu/drm/drm_crtc.c | 34 ------------------
> drivers/gpu/drm/drm_edid.c | 23 +++---------
> drivers/gpu/drm/gma500/cdv_intel_lvds.c | 8 -----
> include/drm/drm_connector.h | 63 ++++++++++++++++++++++++++++++---
> include/drm/drm_crtc.h | 4 ---
> 6 files changed, 97 insertions(+), 69 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
> index cedc3bc4e10b..9e93e0d13117 100644
> --- a/drivers/gpu/drm/drm_connector.c
> +++ b/drivers/gpu/drm/drm_connector.c
> @@ -506,6 +506,40 @@ static const struct drm_prop_enum_list drm_dpms_enum_list[] = {
> };
> DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
>
> +/**
> + * drm_display_info_set_bus_formats - set the supported bus formats
> + * @info: display info to store bus formats in
> + * @formats: array containing the supported bus formats
> + * @num_formats: the number of entries in the fmts array
> + *
> + * Store the supported bus formats in display info structure.
> + * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for
> + * a full list of available formats.
> + */
> +int drm_display_info_set_bus_formats(struct drm_display_info *info,
> + const u32 *formats,
> + unsigned int num_formats)
> +{
> + u32 *fmts = NULL;
> +
> + if (!formats && num_formats)
> + return -EINVAL;
> +
> + if (formats && num_formats) {
> + fmts = kmemdup(formats, sizeof(*formats) * num_formats,
> + GFP_KERNEL);
> + if (!fmts)
> + return -ENOMEM;
> + }
> +
> + kfree(info->bus_formats);
> + info->bus_formats = fmts;
> + info->num_bus_formats = num_formats;
> +
> + return 0;
> +}
> +EXPORT_SYMBOL(drm_display_info_set_bus_formats);
> +
> /* Optional connector properties. */
> static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = {
> { DRM_MODE_SCALE_NONE, "None" },
> diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
> index 69b5626141f5..7bcfb3466ba9 100644
> --- a/drivers/gpu/drm/drm_crtc.c
> +++ b/drivers/gpu/drm/drm_crtc.c
> @@ -391,40 +391,6 @@ void drm_crtc_cleanup(struct drm_crtc *crtc)
> }
> EXPORT_SYMBOL(drm_crtc_cleanup);
>
> -/**
> - * drm_display_info_set_bus_formats - set the supported bus formats
> - * @info: display info to store bus formats in
> - * @formats: array containing the supported bus formats
> - * @num_formats: the number of entries in the fmts array
> - *
> - * Store the supported bus formats in display info structure.
> - * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for
> - * a full list of available formats.
> - */
> -int drm_display_info_set_bus_formats(struct drm_display_info *info,
> - const u32 *formats,
> - unsigned int num_formats)
> -{
> - u32 *fmts = NULL;
> -
> - if (!formats && num_formats)
> - return -EINVAL;
> -
> - if (formats && num_formats) {
> - fmts = kmemdup(formats, sizeof(*formats) * num_formats,
> - GFP_KERNEL);
> - if (!fmts)
> - return -ENOMEM;
> - }
> -
> - kfree(info->bus_formats);
> - info->bus_formats = fmts;
> - info->num_bus_formats = num_formats;
> -
> - return 0;
> -}
> -EXPORT_SYMBOL(drm_display_info_set_bus_formats);
> -
> static int drm_encoder_register_all(struct drm_device *dev)
> {
> struct drm_encoder *encoder;
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index 553390fae803..a4a576424a66 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -3727,14 +3727,7 @@ bool drm_rgb_quant_range_selectable(struct edid *edid)
> }
> EXPORT_SYMBOL(drm_rgb_quant_range_selectable);
>
> -/**
> - * drm_assign_hdmi_deep_color_info - detect whether monitor supports
> - * hdmi deep color modes and update drm_display_info if so.
> - * @edid: monitor EDID information
> - * @info: Updated with maximum supported deep color bpc and color format
> - * if deep color supported.
> - * @connector: DRM connector, used only for debug output
> - *
> +/*
> * Parse the CEA extension according to CEA-861-B.
> * Return true if HDMI deep color supported, false if not or unknown.
> */
> @@ -3828,16 +3821,6 @@ static bool drm_assign_hdmi_deep_color_info(struct edid *edid,
> return false;
> }
>
> -/**
> - * drm_add_display_info - pull display info out if present
> - * @edid: EDID data
> - * @info: display info (attached to connector)
> - * @connector: connector whose edid is used to build display info
> - *
> - * Grab any available display info and stuff it into the drm_display_info
> - * structure that's part of the connector. Useful for tracking bpp and
> - * color spaces.
> - */
> static void drm_add_display_info(struct edid *edid,
> struct drm_display_info *info,
> struct drm_connector *connector)
> @@ -4044,7 +4027,9 @@ static int add_displayid_detailed_modes(struct drm_connector *connector,
> * @connector: connector we're probing
> * @edid: EDID data
> *
> - * Add the specified modes to the connector's mode list.
> + * Add the specified modes to the connector's mode list. Also fills out the
> + * &drm_display_info structure in @connector with any information which can be
> + * derived from the edid.
> *
> * Return: The number of modes added or 0 if we couldn't find any.
> */
> diff --git a/drivers/gpu/drm/gma500/cdv_intel_lvds.c b/drivers/gpu/drm/gma500/cdv_intel_lvds.c
> index 38dc89083148..ea733ab5b1e0 100644
> --- a/drivers/gpu/drm/gma500/cdv_intel_lvds.c
> +++ b/drivers/gpu/drm/gma500/cdv_intel_lvds.c
> @@ -415,14 +415,6 @@ static int cdv_intel_lvds_get_modes(struct drm_connector *connector)
> if (ret)
> return ret;
>
> - /* Didn't get an EDID, so
> - * Set wide sync ranges so we get all modes
> - * handed to valid_mode for checking
> - */
> - connector->display_info.min_vfreq = 0;
> - connector->display_info.max_vfreq = 200;
> - connector->display_info.min_hfreq = 0;
> - connector->display_info.max_hfreq = 200;
Wrong patch?
> if (mode_dev->panel_fixed_mode != NULL) {
> struct drm_display_mode *mode =
> drm_mode_duplicate(dev, mode_dev->panel_fixed_mode);
> diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
> index fa42d2071bfb..11c13c0be5d4 100644
> --- a/include/drm/drm_connector.h
> +++ b/include/drm/drm_connector.h
> @@ -84,28 +84,69 @@ enum subpixel_order {
> SubPixelNone,
> };
>
> -/*
> - * Describes a given display (e.g. CRT or flat panel) and its limitations.
> +/**
> + * struct drm_display_info - runtime data about the connected sink
> + *
> + * Describes a given display (e.g. CRT or flat panel) and its limitations. For
> + * fixed display sinks like built-in panels there's not much difference between
> + * this and struct &drm_connector. But for sinks with a real cable this
> + * structure is meant to describe all the things at the other end of the cable.
> + *
> + * For sinks which provide an EDID this can be filled out by calling
> + * drm_add_edid_modes().
> */
> struct drm_display_info {
> + /**
> + * @name: Name of the display.
> + */
> char name[DRM_DISPLAY_INFO_LEN];
>
> - /* Physical size */
> + /**
> + * @width_mm: Physical width in mm.
> + */
> unsigned int width_mm;
> + /**
> + * @height_mm: Physical width in mm.
*height
> + */
> unsigned int height_mm;
>
> + /**
> + * @pixel_clock: Maximum pixel clock supported by the sink, in units of
> + * 100Hz. This mismatches the clok in &drm_display_mode (which is in
> + * kHZ), because that's what the EDID uses as base unit.
> + */
> unsigned int pixel_clock;
> + /**
> + * @bpc: Maximum bits per color channel. Used by HDMI and DP outputs.
> + */
> unsigned int bpc;
>
> + /**
> + * @subpixel_order: Subpixel order of LCD panels.
> + */
> enum subpixel_order subpixel_order;
>
> #define DRM_COLOR_FORMAT_RGB444 (1<<0)
> #define DRM_COLOR_FORMAT_YCRCB444 (1<<1)
> #define DRM_COLOR_FORMAT_YCRCB422 (1<<2)
>
> + /**
> + * @color_formats: HDMI Color formats, selects between RGB and YCrCb
> + * modes. Used DRM_COLOR_FORMAT\_ defines, which are _not_ the same ones
> + * as used to describe the pixel format in framebuffers, and also don't
> + * match the formats in @bus_formats which are shared with v4l.
> + */
> u32 color_formats;
>
> + /**
> + * @bus_formats: Pixel data format on the wire, somewhat redundant with
> + * @color_formats. Array of size @num_bus_formats encoded using
> + * MEDIA_BUS_FMT\_ defines shared with v4l and media drivers.
> + */
> const u32 *bus_formats;
> + /**
> + * @num_bus_formats: Size of @bus_formats array.
> + */
> unsigned int num_bus_formats;
>
> #define DRM_BUS_FLAG_DE_LOW (1<<0)
> @@ -115,14 +156,28 @@ struct drm_display_info {
> /* drive data on neg. edge */
> #define DRM_BUS_FLAG_PIXDATA_NEGEDGE (1<<3)
>
> + /**
> + * @bus_flags: Additional information (like pixel signal polarity) for
> + * the pixel data on the bus, using DRM_BUS_FLAGS\_ defines.
> + */
> u32 bus_flags;
>
> - /* Mask of supported hdmi deep color modes */
> + /**
> + * @edid_hdmi_dc_modes: Mask of supported hdmi deep color modes. Even
> + * more stuff redundant with @bus_formats.
> + */
> u8 edid_hdmi_dc_modes;
>
> + /**
> + * @cea_rev: CEA revision of the HDMI sink.
> + */
> u8 cea_rev;
> };
>
> +int drm_display_info_set_bus_formats(struct drm_display_info *info,
> + const u32 *formats,
> + unsigned int num_formats);
> +
> /**
> * struct drm_connector_state - mutable connector state
> * @connector: backpointer to the connector
> diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
> index accae9ed6cd7..787d2943a920 100644
> --- a/include/drm/drm_crtc.h
> +++ b/include/drm/drm_crtc.h
> @@ -2194,10 +2194,6 @@ extern void drm_mode_config_init(struct drm_device *dev);
> extern void drm_mode_config_reset(struct drm_device *dev);
> extern void drm_mode_config_cleanup(struct drm_device *dev);
>
> -extern int drm_display_info_set_bus_formats(struct drm_display_info *info,
> - const u32 *formats,
> - unsigned int num_formats);
> -
> static inline bool drm_property_type_is(struct drm_property *property,
> uint32_t type)
> {
> --
> 2.8.1
>
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
More information about the Intel-gfx
mailing list