On ke, 2015-04-29 at 17:21 +0300, Jani Nikula wrote:
> On Sun, 12 Apr 2015, Lukas Wunner <lukas@xxxxxxxxx> wrote:
> > Single channel LVDS maxes out at 112 MHz. All 17" models with i915
> > graphics had a resolution of 1920x1200 (193 MHz), necessitating dual
> > channel LVDS. The 15" pre-retina models had either 1440x900 (106 MHz)
> > or 1680x1050 (119 MHz), both versions used dual channel LVDS even
> > though the smaller one would have fit into a single channel.
> >
> > Signed-off-by: Lukas Wunner <lukas@xxxxxxxxx>
> > Tested-by: Lukas Wunner <lukas@xxxxxxxxx>
>
> Acked-by: Jani Nikula <jani.nikula@xxxxxxxxx>
>
> > ---
> > drivers/gpu/drm/i915/intel_lvds.c | 26 ++++++++++++++++++++++++--
> > 1 file changed, 24 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
> > index 071b96d..417ccab 100644
> > --- a/drivers/gpu/drm/i915/intel_lvds.c
> > +++ b/drivers/gpu/drm/i915/intel_lvds.c
> > @@ -812,12 +812,28 @@ static int intel_dual_link_lvds_callback(const struct dmi_system_id *id)
> > static const struct dmi_system_id intel_dual_link_lvds[] = {
> > {
> > .callback = intel_dual_link_lvds_callback,
> > - .ident = "Apple MacBook Pro (Core i5/i7 Series)",
> > + .ident = "Apple MacBook Pro 15\" (2010)",
> > + .matches = {
> > + DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
> > + DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro6,2"),
> > + },
> > + },
> > + {
> > + .callback = intel_dual_link_lvds_callback,
> > + .ident = "Apple MacBook Pro 15\" (2011)",
> > .matches = {
> > DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
> > DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro8,2"),
> > },
> > },
> > + {
> > + .callback = intel_dual_link_lvds_callback,
> > + .ident = "Apple MacBook Pro 15\" (2012)",
> > + .matches = {
> > + DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
> > + DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro9,1"),
> > + },
> > + },
> > { } /* terminating entry */
> > };
> >
> > @@ -847,6 +863,11 @@ static bool compute_is_dual_link_lvds(struct intel_lvds_encoder *lvds_encoder)
> > if (i915.lvds_channel_mode > 0)
> > return i915.lvds_channel_mode == 2;
> >
> > + /* single channel LVDS is limited to 112 kHz */
s/kHz/MHz/
> > + if (lvds_encoder->attached_connector->base.panel.fixed_mode->clock
> > + > 112999)
> > + return true;
> > +
> > if (dmi_check_system(intel_dual_link_lvds))
> > return true;
> >
> > @@ -1104,6 +1125,8 @@ void intel_lvds_init(struct drm_device *dev)
> > out:
> > mutex_unlock(&dev->mode_config.mutex);
> >
> > + intel_panel_init(&intel_connector->panel, fixed_mode, downclock_mode);
> > +
> > lvds_encoder->is_dual_link = compute_is_dual_link_lvds(lvds_encoder);
> > DRM_DEBUG_KMS("detected %s-link lvds configuration\n",
> > lvds_encoder->is_dual_link ? "dual" : "single");
> > @@ -1118,7 +1141,6 @@ out:
> > }
> > drm_connector_register(connector);
> >
> > - intel_panel_init(&intel_connector->panel, fixed_mode, downclock_mode);
> > intel_panel_setup_backlight(connector, INVALID_PIPE);
> >
> > return;
> > --
> > 1.8.5.2 (Apple Git-48)
> >
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> > http://lists.freedesktop.org/mailman/listinfo/intel-gfx
>
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