linux-toradex.git/include/drm/drm_crtc.h, branch v3.4.87

drm: allow loading an EDID as firmware to override broken monitor

2012-03-20T10:09:28+00:00

Broken monitors and/or broken graphic boards may send erroneous or no
EDID data. This also applies to broken KVM devices that are unable to
correctly forward the EDID data of the connected monitor but invent
their own fantasy data.

This patch allows to specify an EDID data set to be used instead of
probing the monitor for it. It contains built-in data sets of frequently
used screen resolutions. In addition, a particular EDID data set may be
provided in the /lib/firmware directory and loaded via the firmware
interface. The name is passed to the kernel as module parameter of the
drm_kms_helper module either when loaded
  options drm_kms_helper edid_firmware=edid/1280x1024.bin
or as kernel commandline parameter
  drm_kms_helper.edid_firmware=edid/1280x1024.bin

It is also possible to restrict the usage of a specified EDID data set
to a particular connector. This is done by prepending the name of the
connector to the name of the EDID data set using the syntax
  edid_firmware=[:]
such as, for example,
  edid_firmware=DVI-I-1:edid/1920x1080.bin
in which case no other connector will be affected.

The built-in data sets are
Resolution    Name
--------------------------------
1024x768      edid/1024x768.bin
1280x1024     edid/1280x1024.bin
1680x1050     edid/1680x1050.bin
1920x1080     edid/1920x1080.bin

They are ignored, if a file with the same name is available in the
/lib/firmware directory.

The built-in EDID data sets are based on standard timings that may not
apply to a particular monitor and even crash it. Ideally, EDID data of
the connected monitor should be used. They may be obtained through the
drm/cardX/cardX-/edid entry in the /sys/devices PCI directory
of a correctly working graphics adapter.

It is even possible to specify the name of an EDID data set on-the-fly
via the /sys/module interface, e.g.
echo edid/myedid.bin >/sys/module/drm_kms_helper/parameters/edid_firmware
The new screen mode is considered when the related kernel function is
called for the first time after the change. Such calls are made when the
X server is started or when the display settings dialog is opened in an
already running X server.

Signed-off-by: Carsten Emde 
Signed-off-by: Dave Airlie

drm/modeset: add helper to unplug all connectors from sysfs

2012-03-15T13:35:32+00:00

In order to get correct ordering at hot-unplug for userspace,
we need to tear down all the sysfs bits at the correct time.

This adds a helper to allow drivers to remove the sysfs nodes
for all connectors.

Signed-off-by: Dave Airlie

drm: Add drm_mode_copy()

2012-03-15T09:52:51+00:00

Add a helper function to copy a display mode. Use it in
drm_mode_duplicate() and nouveau mode_fixup hooks.

Signed-off-by: Ville Syrjälä 
Signed-off-by: Dave Airlie

drm: Use a flexible array member for blob property data

2012-03-15T09:52:37+00:00

The blob property data is always allocated immediately after the object
header. No need for the extra indirection when accessing it, just use
a flexible array member.

Signed-off-by: Ville Syrjälä 
Reviewed-by: Alex Deucher 
Signed-off-by: Dave Airlie

drm: Handle drm_object_get() failures

2012-03-15T09:52:30+00:00

Check drm_mode_object_get() return value everywhere.

Signed-off-by: Ville Syrjälä 
Reviewed-by: Alex Deucher 
Signed-off-by: Dave Airlie

drm: Fix drm_mode_attachmode_crtc()

2012-03-15T09:51:42+00:00

Change drm_mode_attachmode_crtc() to take an "all or nothing" approach.
If an error is returned, there are no side effects visible.

Also change the function to always duplicate the mode passed in.

Also change the function to not give up when it finds the first
connector without and encoder.

A simpler approach would be to just remove the function completely as
it's unused currently.

Signed-off-by: Ville Syrjälä 
Reviewed-by: Alex Deucher 
Signed-off-by: Dave Airlie

drm: Change drm_display_mode::type to unsigned

2012-03-15T09:49:09+00:00

The drm_display_mode type is a bitmask so it should be unsigned.

Signed-off-by: Ville Syrjälä 
Reviewed-by: Alex Deucher 
Signed-off-by: Dave Airlie

drm: add some caps for userspace to discover more info for dumb KMS driver (v2)

2012-02-16T18:35:11+00:00

For the simple KMS driver case we need some more info about what the preferred
depth and if a shadow framebuffer is preferred.

I've only added this for intel/radeon which support the dumb ioctls so far.

If you need something really fancy you should be writing a real X.org driver.

v2: drop cursor information, just return an error from the cursor ioctls
and we can make userspace fallback to sw cursor in that case, cursor
info was getting too messy, best to start smaller.

Signed-off-by: Dave Airlie

drm: add convenience function to create an range property

2012-02-09T10:15:25+00:00

Creating a range property is a common pattern, so create
a convenience function for this and use it where appropriate.

Signed-off-by: Sascha Hauer 
Signed-off-by: Dave Airlie

drm: add convenience function to create an enum property

2012-02-09T10:15:18+00:00

Creating an enum property is a common pattern, so create
a convenience function for this and use it where appropriate.

Signed-off-by: Sascha Hauer 
Signed-off-by: Dave Airlie