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The _BCM function requires a percentage value. While the
brightness in mailbox3 requires a value in uint8_t. Meaning 255 = 100%.
Previous implementation stored the percentage brightness value resulting
in limiting the brightness to ~40% of it's maximum power.
Only affects brightness control using mailbox3.
Fixes: 6838aaebf9ec ("drvs/intel/gma/acpi: Add methods to use MBOX3")
Change-Id: I290b5f5b2a8ee406e39e86d3e0de9997798d890d
Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
Reviewed-on: https://review.coreboot.org/28345
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
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* Add Mailbox 3 driver
* Request brightness change through Mailbox 3
* Return Ones on error or if unsupported
* Mark existing code as legacy
(still required if no GMA driver is running)
* Call legacy code if Mailbox 3 is unsupported, on error or
if gma driver isn't running
Tested on Lenovo T430:
* Brightness control still works
* Brightness is the same on S3 resume
Change-Id: I51554c819148336b204d28972cbf775a10c3fb8a
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/27711
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-by: Nathaniel Roach <nroach44@gmail.com>
Reviewed-by: Nicola Corna <nicola@corna.info>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
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Those are actually board specific. Keep the old value as defaults,
though. The defaults are included by all affected boards.
Change-Id: Ib865c7b4274f2ea3181a89fc52701b740f9bab7d
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: http://review.coreboot.org/11705
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Vladimir Serbinenko <phcoder@gmail.com>
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