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Lukas Wunner 33fce62829 drm/i915: Assume dual channel LVDS if pixel clock necessitates it ... commit 6f317cfe42 upstream. Single channel LVDS maxes out at 112 MHz, anything above must be dual channel. This avoids the need to specify i915.lvds_channel_mode=2 on all 17" MacBook Pro models with i915 graphics since they had 1920x1200 (193 MHz), plus those 15" pre-retina models which had a resolution of 1680x1050 (119 MHz) as a BTO option. Source for 112 MHz limit of single channel LVDS is section 2.3 of: https://01.org/linuxgraphics/sites/default/files/documentation/ivb_ihd_os_vol3_part4.pdf v2: Avoid hardcoding 17" models by assuming dual channel LVDS if the resolution necessitates it, suggested by Jani Nikula. v3: Fix typo, thanks Joonas Lahtinen. v4: Split commit in two, suggested by Ville Syrjälä. Signed-off-by: Lukas Wunner <lukas@wunner.de> Tested-by: Lukas Wunner <lukas@wunner.de> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> [Jani: included spec reference into the commit message] Signed-off-by: Jani Nikula <jani.nikula@intel.com> Cc: Kamal Mostafa <kamal@canonical.com> [ luis: backported to 3.16: adjusted context ] Signed-off-by: Luis Henriques <luis.henriques@canonical.com>		History 2015-06-16 16:01:47 +01:00
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drm	drm/i915: Assume dual channel LVDS if pixel clock necessitates it	2015-06-16 16:01:47 +01:00
host1x	gpu: host1x: Rename internal functions for clarity	2014-06-05 23:10:30 +02:00
ipu-v3	Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux	2014-06-12 11:32:30 -07:00
vga	vgaarb: Don't default exclusively to first video device with mem+io	2014-10-09 12:23:49 -07:00
Makefile	gpu: ipu-v3: Move i.MX IPUv3 core driver out of staging	2014-06-04 11:06:52 +02:00