| From | Greg Kroah-Hartman <> | Subject | [ 215/218] drm/udl: limit modes to the sku pixel limits. | Date | Fri, 28 Sep 2012 13:17:12 -0700 |
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3.4-stable review patch. If anyone has any objections, please let me know.
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From: Dave Airlie <airlied@redhat.com>
commit 3a75885848996baab5276ff37ebf7295c3c753f0 upstream.
Otherwise when X starts we commonly get a black screen scanning out nothing, its wierd dpms on/off from userspace brings it back,
With this on F18, multi-seat works again with my 1920x1200 monitor which is above the sku limit for the device I have.
Reviewed-by: Alex Deucher <alexander.deucher@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/gpu/drm/udl/udl_connector.c | 7 +++++++ 1 file changed, 7 insertions(+)
--- a/drivers/gpu/drm/udl/udl_connector.c +++ b/drivers/gpu/drm/udl/udl_connector.c @@ -69,6 +69,13 @@ static int udl_get_modes(struct drm_conn static int udl_mode_valid(struct drm_connector *connector, struct drm_display_mode *mode) { + struct udl_device *udl = connector->dev->dev_private; + if (!udl->sku_pixel_limit) + return 0; + + if (mode->vdisplay * mode->hdisplay > udl->sku_pixel_limit) + return MODE_VIRTUAL_Y; + return 0; }
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