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video: arm: rpi: Bail out early if querying video information fails

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When probing we query for the width and hight of the display. If the
firmware does not report any connected display the system will crash.
See https://github.com/raspberrypi/firmware/issues/1157 for details.

Signed-off-by: Fabian Vogt <fvogt@suse.com>
[mb: update commit message]
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Tested-by: Andre Przywara <andre.przywara@arm.com>
This commit is contained in:
Fabian Vogt 2019-07-11 16:56:24 +02:00 committed by Anatolij Gustschin
parent 60a62acfb0
commit 970baf16d1
1 changed files with 3 additions and 1 deletions
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4
drivers/video/bcm2835.c
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@ -19,13 +19,15 @@ static int bcm2835_video_probe(struct udevice *dev)
debug("bcm2835: Query resolution...\n");
ret = bcm2835_get_video_size(&w, &h);
if (ret)
if (ret || w == 0 || h == 0)
return -EIO;
debug("bcm2835: Setting up display for %d x %d\n", w, h);
ret = bcm2835_set_video_params(&w, &h, 32, BCM2835_MBOX_PIXEL_ORDER_RGB,
BCM2835_MBOX_ALPHA_MODE_IGNORED,
&fb_base, &fb_size, &pitch);
if (ret)
return -EIO;
debug("bcm2835: Final resolution is %d x %d\n", w, h);