drm: Move drm_display_mode an related docs into kerneldoc
This was in the documentation for modeset helper hooks, where it is a bit misplaced. v2: Reindent the drm_mode_status enum, inspired by Ville. v3: Suggestions from Ville and Thierry. v4: Small fixup that 0day spotted. v5: Slight change to avoid accidental headings in kerneldoc output. Cc: ville.syrjala@linux.intel.com Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1449218769-16577-27-git-send-email-daniel.vetter@ffwll.ch Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> (v3) Reviewed-by: Thierry Reding <treding@nvidia.com> (v3)
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@ -1757,198 +1757,6 @@ void intel_crt_init(struct drm_device *dev)
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connector_status_connected. There is no need to call
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<function>drm_add_edid_modes</function> manually in that case.
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</para>
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<para>
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When adding modes manually the driver creates each mode with a call to
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<function>drm_mode_create</function> and must fill the following fields.
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<itemizedlist>
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<listitem>
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<synopsis>__u32 type;</synopsis>
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<para>
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Mode type bitmask, a combination of
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<variablelist>
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<varlistentry>
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<term>DRM_MODE_TYPE_BUILTIN</term>
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<listitem><para>not used?</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>DRM_MODE_TYPE_CLOCK_C</term>
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<listitem><para>not used?</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>DRM_MODE_TYPE_CRTC_C</term>
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<listitem><para>not used?</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>
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DRM_MODE_TYPE_PREFERRED - The preferred mode for the connector
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</term>
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<listitem>
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<para>not used?</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>DRM_MODE_TYPE_DEFAULT</term>
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<listitem><para>not used?</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>DRM_MODE_TYPE_USERDEF</term>
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<listitem><para>not used?</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>DRM_MODE_TYPE_DRIVER</term>
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<listitem>
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<para>
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The mode has been created by the driver (as opposed to
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to user-created modes).
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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Drivers must set the DRM_MODE_TYPE_DRIVER bit for all modes they
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create, and set the DRM_MODE_TYPE_PREFERRED bit for the preferred
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mode.
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</para>
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</listitem>
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<listitem>
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<synopsis>__u32 clock;</synopsis>
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<para>Pixel clock frequency in kHz unit</para>
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</listitem>
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<listitem>
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<synopsis>__u16 hdisplay, hsync_start, hsync_end, htotal;
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__u16 vdisplay, vsync_start, vsync_end, vtotal;</synopsis>
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<para>Horizontal and vertical timing information</para>
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<screen><![CDATA[
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Active Front Sync Back
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Region Porch Porch
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<-----------------------><----------------><-------------><-------------->
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//////////////////////|
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////////////////////// |
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////////////////////// |.................. ................
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_______________
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<----- [hv]display ----->
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<------------- [hv]sync_start ------------>
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<--------------------- [hv]sync_end --------------------->
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<-------------------------------- [hv]total ----------------------------->
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]]></screen>
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</listitem>
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<listitem>
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<synopsis>__u16 hskew;
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__u16 vscan;</synopsis>
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<para>Unknown</para>
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</listitem>
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<listitem>
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<synopsis>__u32 flags;</synopsis>
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<para>
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Mode flags, a combination of
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<variablelist>
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<varlistentry>
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<term>DRM_MODE_FLAG_PHSYNC</term>
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<listitem><para>
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Horizontal sync is active high
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>DRM_MODE_FLAG_NHSYNC</term>
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<listitem><para>
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Horizontal sync is active low
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>DRM_MODE_FLAG_PVSYNC</term>
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<listitem><para>
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Vertical sync is active high
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>DRM_MODE_FLAG_NVSYNC</term>
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<listitem><para>
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Vertical sync is active low
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>DRM_MODE_FLAG_INTERLACE</term>
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<listitem><para>
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Mode is interlaced
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>DRM_MODE_FLAG_DBLSCAN</term>
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<listitem><para>
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Mode uses doublescan
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>DRM_MODE_FLAG_CSYNC</term>
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<listitem><para>
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Mode uses composite sync
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>DRM_MODE_FLAG_PCSYNC</term>
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<listitem><para>
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Composite sync is active high
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>DRM_MODE_FLAG_NCSYNC</term>
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<listitem><para>
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Composite sync is active low
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>DRM_MODE_FLAG_HSKEW</term>
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<listitem><para>
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hskew provided (not used?)
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>DRM_MODE_FLAG_BCAST</term>
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<listitem><para>
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not used?
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>DRM_MODE_FLAG_PIXMUX</term>
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<listitem><para>
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not used?
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>DRM_MODE_FLAG_DBLCLK</term>
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<listitem><para>
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not used?
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>DRM_MODE_FLAG_CLKDIV2</term>
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<listitem><para>
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?
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</para></listitem>
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</varlistentry>
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</variablelist>
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</para>
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<para>
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Note that modes marked with the INTERLACE or DBLSCAN flags will be
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filtered out by
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<function>drm_helper_probe_single_connector_modes</function> if
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the connector's <structfield>interlace_allowed</structfield> or
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<structfield>doublescan_allowed</structfield> field is set to 0.
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</para>
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</listitem>
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<listitem>
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<synopsis>char name[DRM_DISPLAY_MODE_LEN];</synopsis>
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<para>
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Mode name. The driver must call
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<function>drm_mode_set_name</function> to fill the mode name from
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<structfield>hdisplay</structfield>,
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<structfield>vdisplay</structfield> and interlace flag after
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filling the corresponding fields.
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</para>
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</listitem>
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</itemizedlist>
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</para>
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<para>
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The <structfield>vrefresh</structfield> value is computed by
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<function>drm_helper_probe_single_connector_modes</function>.
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@ -708,7 +708,8 @@ void drm_mode_set_name(struct drm_display_mode *mode)
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}
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EXPORT_SYMBOL(drm_mode_set_name);
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/** drm_mode_hsync - get the hsync of a mode
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/**
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* drm_mode_hsync - get the hsync of a mode
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* @mode: mode
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*
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* Returns:
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@ -2949,6 +2949,10 @@ i915_gem_idle_work_handler(struct work_struct *work)
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if (!list_empty(&ring->request_list))
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return;
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/* we probably should sync with hangcheck here, using cancel_work_sync.
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* Also locking seems to be fubar here, ring->request_list is protected
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* by dev->struct_mutex. */
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intel_mark_idle(dev);
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if (mutex_trylock(&dev->struct_mutex)) {
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@ -35,46 +35,91 @@
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* structures).
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*/
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/**
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* enum drm_mode_status - hardware support status of a mode
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* @MODE_OK: Mode OK
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* @MODE_HSYNC: hsync out of range
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* @MODE_VSYNC: vsync out of range
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* @MODE_H_ILLEGAL: mode has illegal horizontal timings
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* @MODE_V_ILLEGAL: mode has illegal horizontal timings
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* @MODE_BAD_WIDTH: requires an unsupported linepitch
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* @MODE_NOMODE: no mode with a matching name
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* @MODE_NO_INTERLACE: interlaced mode not supported
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* @MODE_NO_DBLESCAN: doublescan mode not supported
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* @MODE_NO_VSCAN: multiscan mode not supported
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* @MODE_MEM: insufficient video memory
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* @MODE_VIRTUAL_X: mode width too large for specified virtual size
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* @MODE_VIRTUAL_Y: mode height too large for specified virtual size
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* @MODE_MEM_VIRT: insufficient video memory given virtual size
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* @MODE_NOCLOCK: no fixed clock available
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* @MODE_CLOCK_HIGH: clock required is too high
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* @MODE_CLOCK_LOW: clock required is too low
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* @MODE_CLOCK_RANGE: clock/mode isn't in a ClockRange
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* @MODE_BAD_HVALUE: horizontal timing was out of range
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* @MODE_BAD_VVALUE: vertical timing was out of range
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* @MODE_BAD_VSCAN: VScan value out of range
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* @MODE_HSYNC_NARROW: horizontal sync too narrow
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* @MODE_HSYNC_WIDE: horizontal sync too wide
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* @MODE_HBLANK_NARROW: horizontal blanking too narrow
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* @MODE_HBLANK_WIDE: horizontal blanking too wide
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* @MODE_VSYNC_NARROW: vertical sync too narrow
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* @MODE_VSYNC_WIDE: vertical sync too wide
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* @MODE_VBLANK_NARROW: vertical blanking too narrow
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* @MODE_VBLANK_WIDE: vertical blanking too wide
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* @MODE_PANEL: exceeds panel dimensions
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* @MODE_INTERLACE_WIDTH: width too large for interlaced mode
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* @MODE_ONE_WIDTH: only one width is supported
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* @MODE_ONE_HEIGHT: only one height is supported
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* @MODE_ONE_SIZE: only one resolution is supported
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* @MODE_NO_REDUCED: monitor doesn't accept reduced blanking
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* @MODE_NO_STEREO: stereo modes not supported
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* @MODE_UNVERIFIED: mode needs to reverified
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* @MODE_BAD: unspecified reason
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* @MODE_ERROR: error condition
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*
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* This enum is used to filter out modes not supported by the driver/hardware
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* combination.
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*/
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enum drm_mode_status {
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MODE_OK = 0, /* Mode OK */
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MODE_HSYNC, /* hsync out of range */
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MODE_VSYNC, /* vsync out of range */
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MODE_H_ILLEGAL, /* mode has illegal horizontal timings */
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MODE_V_ILLEGAL, /* mode has illegal horizontal timings */
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MODE_BAD_WIDTH, /* requires an unsupported linepitch */
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MODE_NOMODE, /* no mode with a matching name */
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MODE_NO_INTERLACE, /* interlaced mode not supported */
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MODE_NO_DBLESCAN, /* doublescan mode not supported */
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MODE_NO_VSCAN, /* multiscan mode not supported */
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MODE_MEM, /* insufficient video memory */
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MODE_VIRTUAL_X, /* mode width too large for specified virtual size */
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MODE_VIRTUAL_Y, /* mode height too large for specified virtual size */
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MODE_MEM_VIRT, /* insufficient video memory given virtual size */
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MODE_NOCLOCK, /* no fixed clock available */
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MODE_CLOCK_HIGH, /* clock required is too high */
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MODE_CLOCK_LOW, /* clock required is too low */
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MODE_CLOCK_RANGE, /* clock/mode isn't in a ClockRange */
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MODE_BAD_HVALUE, /* horizontal timing was out of range */
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MODE_BAD_VVALUE, /* vertical timing was out of range */
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MODE_BAD_VSCAN, /* VScan value out of range */
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MODE_HSYNC_NARROW, /* horizontal sync too narrow */
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MODE_HSYNC_WIDE, /* horizontal sync too wide */
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MODE_HBLANK_NARROW, /* horizontal blanking too narrow */
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MODE_HBLANK_WIDE, /* horizontal blanking too wide */
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MODE_VSYNC_NARROW, /* vertical sync too narrow */
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MODE_VSYNC_WIDE, /* vertical sync too wide */
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MODE_VBLANK_NARROW, /* vertical blanking too narrow */
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MODE_VBLANK_WIDE, /* vertical blanking too wide */
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MODE_PANEL, /* exceeds panel dimensions */
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MODE_INTERLACE_WIDTH, /* width too large for interlaced mode */
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MODE_ONE_WIDTH, /* only one width is supported */
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MODE_ONE_HEIGHT, /* only one height is supported */
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MODE_ONE_SIZE, /* only one resolution is supported */
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MODE_NO_REDUCED, /* monitor doesn't accept reduced blanking */
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MODE_NO_STEREO, /* stereo modes not supported */
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MODE_UNVERIFIED = -3, /* mode needs to reverified */
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MODE_BAD = -2, /* unspecified reason */
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MODE_ERROR = -1 /* error condition */
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MODE_OK = 0,
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MODE_HSYNC,
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MODE_VSYNC,
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MODE_H_ILLEGAL,
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MODE_V_ILLEGAL,
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MODE_BAD_WIDTH,
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MODE_NOMODE,
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MODE_NO_INTERLACE,
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MODE_NO_DBLESCAN,
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MODE_NO_VSCAN,
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MODE_MEM,
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MODE_VIRTUAL_X,
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MODE_VIRTUAL_Y,
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MODE_MEM_VIRT,
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MODE_NOCLOCK,
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MODE_CLOCK_HIGH,
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MODE_CLOCK_LOW,
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MODE_CLOCK_RANGE,
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MODE_BAD_HVALUE,
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MODE_BAD_VVALUE,
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MODE_BAD_VSCAN,
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MODE_HSYNC_NARROW,
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MODE_HSYNC_WIDE,
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MODE_HBLANK_NARROW,
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MODE_HBLANK_WIDE,
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MODE_VSYNC_NARROW,
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MODE_VSYNC_WIDE,
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MODE_VBLANK_NARROW,
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MODE_VBLANK_WIDE,
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MODE_PANEL,
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MODE_INTERLACE_WIDTH,
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MODE_ONE_WIDTH,
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MODE_ONE_HEIGHT,
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MODE_ONE_SIZE,
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MODE_NO_REDUCED,
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MODE_NO_STEREO,
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MODE_UNVERIFIED = -3,
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MODE_BAD = -2,
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MODE_ERROR = -1
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};
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#define DRM_MODE_TYPE_CLOCK_CRTC_C (DRM_MODE_TYPE_CLOCK_C | \
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@ -96,17 +141,125 @@ enum drm_mode_status {
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#define DRM_MODE_FLAG_3D_MAX DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF
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/**
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* struct drm_display_mode - DRM kernel-internal display mode structure
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* @hdisplay: horizontal display size
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* @hsync_start: horizontal sync start
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* @hsync_end: horizontal sync end
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* @htotal: horizontal total size
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* @hskew: horizontal skew?!
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* @vdisplay: vertical display size
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* @vsync_start: vertical sync start
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* @vsync_end: vertical sync end
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* @vtotal: vertical total size
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* @vscan: vertical scan?!
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* @crtc_hdisplay: hardware mode horizontal display size
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* @crtc_hblank_start: hardware mode horizontal blank start
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* @crtc_hblank_end: hardware mode horizontal blank end
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* @crtc_hsync_start: hardware mode horizontal sync start
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* @crtc_hsync_end: hardware mode horizontal sync end
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* @crtc_htotal: hardware mode horizontal total size
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* @crtc_hskew: hardware mode horizontal skew?!
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* @crtc_vdisplay: hardware mode vertical display size
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* @crtc_vblank_start: hardware mode vertical blank start
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* @crtc_vblank_end: hardware mode vertical blank end
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* @crtc_vsync_start: hardware mode vertical sync start
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* @crtc_vsync_end: hardware mode vertical sync end
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* @crtc_vtotal: hardware mode vertical total size
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*
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* The horizontal and vertical timings are defined per the following diagram.
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*
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*
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* Active Front Sync Back
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* Region Porch Porch
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* <-----------------------><----------------><-------------><-------------->
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* //////////////////////|
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* ////////////////////// |
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* ////////////////////// |.................. ................
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* _______________
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* <----- [hv]display ----->
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* <------------- [hv]sync_start ------------>
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* <--------------------- [hv]sync_end --------------------->
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* <-------------------------------- [hv]total ----------------------------->*
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*
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* This structure contains two copies of timings. First are the plain timings,
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* which specify the logical mode, as it would be for a progressive 1:1 scanout
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* at the refresh rate userspace can observe through vblank timestamps. Then
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* there's the hardware timings, which are corrected for interlacing,
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* double-clocking and similar things. They are provided as a convenience, and
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* can be appropriately computed using drm_mode_set_crtcinfo().
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*/
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struct drm_display_mode {
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/* Header */
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/**
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* @head:
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*
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* struct list_head for mode lists.
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*/
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struct list_head head;
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/**
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* @base:
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*
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* A display mode is a normal modeset object, possibly including public
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* userspace id.
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*
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* FIXME:
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*
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* This can probably be removed since the entire concept of userspace
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* managing modes explicitly has never landed in upstream kernel mode
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* setting support.
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*/
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struct drm_mode_object base;
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/**
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* @name:
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*
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* Human-readable name of the mode, filled out with drm_mode_set_name().
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*/
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char name[DRM_DISPLAY_MODE_LEN];
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/**
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* @status:
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*
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* Status of the mode, used to filter out modes not supported by the
|
||||
* hardware. See enum &drm_mode_status.
|
||||
*/
|
||||
enum drm_mode_status status;
|
||||
|
||||
/**
|
||||
* @type:
|
||||
*
|
||||
* A bitmask of flags, mostly about the source of a mode. Possible flags
|
||||
* are:
|
||||
*
|
||||
* - DRM_MODE_TYPE_BUILTIN: Meant for hard-coded modes, effectively
|
||||
* unused.
|
||||
* - DRM_MODE_TYPE_PREFERRED: Preferred mode, usually the native
|
||||
* resolution of an LCD panel. There should only be one preferred
|
||||
* mode per connector at any given time.
|
||||
* - DRM_MODE_TYPE_DRIVER: Mode created by the driver, which is all of
|
||||
* them really. Drivers must set this bit for all modes they create
|
||||
* and expose to userspace.
|
||||
*
|
||||
* Plus a big list of flags which shouldn't be used at all, but are
|
||||
* still around since these flags are also used in the userspace ABI:
|
||||
*
|
||||
* - DRM_MODE_TYPE_DEFAULT: Again a leftover, use
|
||||
* DRM_MODE_TYPE_PREFERRED instead.
|
||||
* - DRM_MODE_TYPE_CLOCK_C and DRM_MODE_TYPE_CRTC_C: Define leftovers
|
||||
* which are stuck around for hysterical raisins only. No one has an
|
||||
* idea what they were meant for. Don't use.
|
||||
* - DRM_MODE_TYPE_USERDEF: Mode defined by userspace, again a vestige
|
||||
* from older kms designs where userspace had to first add a custom
|
||||
* mode to the kernel's mode list before it could use it. Don't use.
|
||||
*/
|
||||
unsigned int type;
|
||||
|
||||
/* Proposed mode values */
|
||||
/**
|
||||
* @clock:
|
||||
*
|
||||
* Pixel clock in kHz.
|
||||
*/
|
||||
int clock; /* in kHz */
|
||||
int hdisplay;
|
||||
int hsync_start;
|
||||
|
@ -118,14 +271,74 @@ struct drm_display_mode {
|
|||
int vsync_end;
|
||||
int vtotal;
|
||||
int vscan;
|
||||
/**
|
||||
* @flags:
|
||||
*
|
||||
* Sync and timing flags:
|
||||
*
|
||||
* - DRM_MODE_FLAG_PHSYNC: horizontal sync is active high.
|
||||
* - DRM_MODE_FLAG_NHSYNC: horizontal sync is active low.
|
||||
* - DRM_MODE_FLAG_PVSYNC: vertical sync is active high.
|
||||
* - DRM_MODE_FLAG_NVSYNC: vertical sync is active low.
|
||||
* - DRM_MODE_FLAG_INTERLACE: mode is interlaced.
|
||||
* - DRM_MODE_FLAG_DBLSCAN: mode uses doublescan.
|
||||
* - DRM_MODE_FLAG_CSYNC: mode uses composite sync.
|
||||
* - DRM_MODE_FLAG_PCSYNC: composite sync is active high.
|
||||
* - DRM_MODE_FLAG_NCSYNC: composite sync is active low.
|
||||
* - DRM_MODE_FLAG_HSKEW: hskew provided (not used?).
|
||||
* - DRM_MODE_FLAG_BCAST: not used?
|
||||
* - DRM_MODE_FLAG_PIXMUX: not used?
|
||||
* - DRM_MODE_FLAG_DBLCLK: double-clocked mode.
|
||||
* - DRM_MODE_FLAG_CLKDIV2: half-clocked mode.
|
||||
*
|
||||
* Additionally there's flags to specify how 3D modes are packed:
|
||||
*
|
||||
* - DRM_MODE_FLAG_3D_NONE: normal, non-3D mode.
|
||||
* - DRM_MODE_FLAG_3D_FRAME_PACKING: 2 full frames for left and right.
|
||||
* - DRM_MODE_FLAG_3D_FIELD_ALTERNATIVE: interleaved like fields.
|
||||
* - DRM_MODE_FLAG_3D_LINE_ALTERNATIVE: interleaved lines.
|
||||
* - DRM_MODE_FLAG_3D_SIDE_BY_SIDE_FULL: side-by-side full frames.
|
||||
* - DRM_MODE_FLAG_3D_L_DEPTH: ?
|
||||
* - DRM_MODE_FLAG_3D_L_DEPTH_GFX_GFX_DEPTH: ?
|
||||
* - DRM_MODE_FLAG_3D_TOP_AND_BOTTOM: frame split into top and bottom
|
||||
* parts.
|
||||
* - DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF: frame split into left and
|
||||
* right parts.
|
||||
*/
|
||||
unsigned int flags;
|
||||
|
||||
/* Addressable image size (may be 0 for projectors, etc.) */
|
||||
/**
|
||||
* @width_mm:
|
||||
*
|
||||
* Addressable size of the output in mm, projectors should set this to
|
||||
* 0.
|
||||
*/
|
||||
int width_mm;
|
||||
|
||||
/**
|
||||
* @height_mm:
|
||||
*
|
||||
* Addressable size of the output in mm, projectors should set this to
|
||||
* 0.
|
||||
*/
|
||||
int height_mm;
|
||||
|
||||
/* Actual mode we give to hw */
|
||||
int crtc_clock; /* in KHz */
|
||||
/**
|
||||
* @crtc_clock:
|
||||
*
|
||||
* Actual pixel or dot clock in the hardware. This differs from the
|
||||
* logical @clock when e.g. using interlacing, double-clocking, stereo
|
||||
* modes or other fancy stuff that changes the timings and signals
|
||||
* actually sent over the wire.
|
||||
*
|
||||
* This is again in kHz.
|
||||
*
|
||||
* Note that with digital outputs like HDMI or DP there's usually a
|
||||
* massive confusion between the dot clock and the signal clock at the
|
||||
* bit encoding level. Especially when a 8b/10b encoding is used and the
|
||||
* difference is exactly a factor of 10.
|
||||
*/
|
||||
int crtc_clock;
|
||||
int crtc_hdisplay;
|
||||
int crtc_hblank_start;
|
||||
int crtc_hblank_end;
|
||||
|
@ -140,12 +353,48 @@ struct drm_display_mode {
|
|||
int crtc_vsync_end;
|
||||
int crtc_vtotal;
|
||||
|
||||
/* Driver private mode info */
|
||||
/**
|
||||
* @private:
|
||||
*
|
||||
* Pointer for driver private data. This can only be used for mode
|
||||
* objects passed to drivers in modeset operations. It shouldn't be used
|
||||
* by atomic drivers since they can store any additional data by
|
||||
* subclassing state structures.
|
||||
*/
|
||||
int *private;
|
||||
|
||||
/**
|
||||
* @private_flags:
|
||||
*
|
||||
* Similar to @private, but just an integer.
|
||||
*/
|
||||
int private_flags;
|
||||
|
||||
int vrefresh; /* in Hz */
|
||||
int hsync; /* in kHz */
|
||||
/**
|
||||
* @vrefresh:
|
||||
*
|
||||
* Vertical refresh rate, for debug output in human readable form. Not
|
||||
* used in a functional way.
|
||||
*
|
||||
* This value is in Hz.
|
||||
*/
|
||||
int vrefresh;
|
||||
|
||||
/**
|
||||
* @hsync:
|
||||
*
|
||||
* Horizontal refresh rate, for debug output in human readable form. Not
|
||||
* used in a functional way.
|
||||
*
|
||||
* This value is in kHz.
|
||||
*/
|
||||
int hsync;
|
||||
|
||||
/**
|
||||
* @picture_aspect_ratio:
|
||||
*
|
||||
* Field for setting the HDMI picture aspect ratio of a mode.
|
||||
*/
|
||||
enum hdmi_picture_aspect picture_aspect_ratio;
|
||||
};
|
||||
|
||||
|
|
Loading…
Reference in a new issue