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author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2014-12-10 22:11:31 +0300 |
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committer | Dave Airlie <airlied@redhat.com> | 2014-12-11 03:28:41 +0300 |
commit | f41c2581bc2b6b21f774596845952a7cb4c15c74 (patch) | |
tree | ecbfd6722709f613c37abd7cc2ccad777a4a17b7 /Documentation/DocBook/drm.tmpl | |
parent | da9df2f41057d71102668f5ac6b3fc998118a59b (diff) | |
download | linux-f41c2581bc2b6b21f774596845952a7cb4c15c74.tar.xz |
drm/doc: Document drm_add_modes_noedid() usage
And fix a spelling mistake.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'Documentation/DocBook/drm.tmpl')
-rw-r--r-- | Documentation/DocBook/drm.tmpl | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/Documentation/DocBook/drm.tmpl b/Documentation/DocBook/drm.tmpl index 7a44d9d43c49..4b592ffbafee 100644 --- a/Documentation/DocBook/drm.tmpl +++ b/Documentation/DocBook/drm.tmpl @@ -1947,10 +1947,16 @@ void intel_crt_init(struct drm_device *dev) and then retrieves a list of modes by calling the connector <methodname>get_modes</methodname> helper operation. </para> + <para> + If the helper operation returns no mode, and if the connector status + is connector_status_connected, standard VESA DMT modes up to + 1024x768 are automatically added to the modes list by a call to + <function>drm_add_modes_noedid</function>. + </para> <para> - The function filters out modes larger than + The function then filters out modes larger than <parameter>max_width</parameter> and <parameter>max_height</parameter> - if specified. It then calls the optional connector + if specified. It finally calls the optional connector <methodname>mode_valid</methodname> helper operation for each mode in the probed list to check whether the mode is valid for the connector. </para> @@ -2090,12 +2096,20 @@ void intel_crt_init(struct drm_device *dev) <synopsis>int (*get_modes)(struct drm_connector *connector);</synopsis> <para> Fill the connector's <structfield>probed_modes</structfield> list - by parsing EDID data with <function>drm_add_edid_modes</function> or - calling <function>drm_mode_probed_add</function> directly for every + by parsing EDID data with <function>drm_add_edid_modes</function>, + adding standard VESA DMT modes with <function>drm_add_modes_noedid</function>, + or calling <function>drm_mode_probed_add</function> directly for every supported mode and return the number of modes it has detected. This operation is mandatory. </para> <para> + Note that the caller function will automatically add standard VESA + DMT modes up to 1024x768 if the <methodname>get_modes</methodname> + helper operation returns no mode and if the connector status is + connector_status_connected. There is no need to call + <function>drm_add_edid_modes</function> manually in that case. + </para> + <para> When adding modes manually the driver creates each mode with a call to <function>drm_mode_create</function> and must fill the following fields. <itemizedlist> @@ -2292,7 +2306,7 @@ void intel_crt_init(struct drm_device *dev) <function>drm_helper_probe_single_connector_modes</function>. </para> <para> - When parsing EDID data, <function>drm_add_edid_modes</function> fill the + When parsing EDID data, <function>drm_add_edid_modes</function> fills the connector <structfield>display_info</structfield> <structfield>width_mm</structfield> and <structfield>height_mm</structfield> fields. When creating modes |