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authorDaniel Vetter <daniel.vetter@ffwll.ch>2014-01-22 16:46:44 +0100
committerDaniel Vetter <daniel.vetter@ffwll.ch>2014-03-13 12:48:32 +0100
commit4c6e2dfe08987b1e5d884939967037d68412d829 (patch)
tree8325b22871388b5c9538174599d440a7185eff66 /Documentation/DocBook/drm.tmpl
parentdrm/doc: Document drm_helper_resume_force_mode (diff)
downloadlinux-4c6e2dfe08987b1e5d884939967037d68412d829.tar.xz
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drm/doc: Hide legacy horrors better
By consolidating them all into one section at the very end. And to make double-sure that no one gets confused start with a stern warning against any use of them. And prefix all subsections with "Legacy". Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'Documentation/DocBook/drm.tmpl')
-rw-r--r--Documentation/DocBook/drm.tmpl56
1 files changed, 34 insertions, 22 deletions
diff --git a/Documentation/DocBook/drm.tmpl b/Documentation/DocBook/drm.tmpl
index 8e1052434bab..0a9407ae4025 100644
--- a/Documentation/DocBook/drm.tmpl
+++ b/Documentation/DocBook/drm.tmpl
@@ -2579,32 +2579,44 @@ int num_ioctls;</synopsis>
</para>
</sect2>
</sect1>
-
<sect1>
- <title>Suspend/Resume</title>
- <para>
- The DRM core provides some suspend/resume code, but drivers wanting full
- suspend/resume support should provide save() and restore() functions.
- These are called at suspend, hibernate, or resume time, and should perform
- any state save or restore required by your device across suspend or
- hibernate states.
- </para>
- <synopsis>int (*suspend) (struct drm_device *, pm_message_t state);
-int (*resume) (struct drm_device *);</synopsis>
+ <title>Legacy Support Code</title>
<para>
- Those are legacy suspend and resume methods. New driver should use the
- power management interface provided by their bus type (usually through
- the struct <structname>device_driver</structname> dev_pm_ops) and set
- these methods to NULL.
+ The section very brievely covers some of the old legacy support code which
+ is only used by old DRM drivers which have done a so-called shadow-attach
+ to the underlying device instead of registering as a real driver. This
+ also includes some of the old generic buffer mangement and command
+ submission code. Do not use any of this in new and modern drivers.
</para>
- </sect1>
- <sect1>
- <title>DMA services</title>
- <para>
- This should cover how DMA mapping etc. is supported by the core.
- These functions are deprecated and should not be used.
- </para>
+ <sect2>
+ <title>Legacy Suspend/Resume</title>
+ <para>
+ The DRM core provides some suspend/resume code, but drivers wanting full
+ suspend/resume support should provide save() and restore() functions.
+ These are called at suspend, hibernate, or resume time, and should perform
+ any state save or restore required by your device across suspend or
+ hibernate states.
+ </para>
+ <synopsis>int (*suspend) (struct drm_device *, pm_message_t state);
+ int (*resume) (struct drm_device *);</synopsis>
+ <para>
+ Those are legacy suspend and resume methods which
+ <emphasis>only</emphasis> work with the legacy shadow-attach driver
+ registration functions. New driver should use the power management
+ interface provided by their bus type (usually through
+ the struct <structname>device_driver</structname> dev_pm_ops) and set
+ these methods to NULL.
+ </para>
+ </sect2>
+
+ <sect2>
+ <title>Legacy DMA Services</title>
+ <para>
+ This should cover how DMA mapping etc. is supported by the core.
+ These functions are deprecated and should not be used.
+ </para>
+ </sect2>
</sect1>
</chapter>