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If linebytes property is missing from the graphics device, assume no

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overscan and synthesize it from the display depth and screen width.
This may not be right, but it sometimes right and is better than
returning CN_DEAD.
This commit is contained in:
Nathan Whitehorn 2018-05-30 04:15:33 +00:00
parent 8ffdc5df52
commit 452a74bfee
1 changed files with 4 additions and 3 deletions
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7
sys/dev/vt/hw/ofwfb/ofwfb.c
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@ -394,8 +394,7 @@ ofwfb_init(struct vt_device *vd)
/* Make sure we have needed properties */
if (OF_getproplen(node, "height") != sizeof(height) ||
OF_getproplen(node, "width") != sizeof(width) ||
OF_getproplen(node, "depth") != sizeof(depth) ||
OF_getproplen(node, "linebytes") != sizeof(sc->fb.fb_stride))
OF_getproplen(node, "depth") != sizeof(depth))
return (CN_DEAD);
/* Only support 8 and 32-bit framebuffers */
@ -406,7 +405,9 @@ ofwfb_init(struct vt_device *vd)
OF_getprop(node, "height", &height, sizeof(height));
OF_getprop(node, "width", &width, sizeof(width));
OF_getprop(node, "linebytes", &stride, sizeof(stride));
if (OF_getprop(node, "linebytes", &stride, sizeof(stride)) !=
sizeof(stride))
stride = width*depth/8;
sc->fb.fb_height = height;
sc->fb.fb_width = width;