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video: simplefb: Add stride handling

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Some framebuffers (i.e MediaTek) do not have regular stride - its line
length is more than the display width by 8 pixels (on MT6878). As such,
introduce the optional stride property, which fixes these framebuffers.

Signed-off-by: Igor Belwon <igor.belwon@mentallysanemainliners.org>
This commit is contained in:
Igor Belwon
2025-11-04 15:50:36 +01:00
committed by Tom Rini
parent b3afb1946e
commit ac56c61332
1 changed files with 6 additions and 1 deletions
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7
drivers/video/simplefb.c
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@@ -19,7 +19,7 @@ static int simple_video_probe(struct udevice *dev)
int ret;
fdt_addr_t base;
fdt_size_t size;
u32 width, height, rot;
u32 width, height, stride, rot;
base = dev_read_addr_size(dev, &size);
if (base == FDT_ADDR_T_NONE) {
@@ -52,6 +52,11 @@ static int simple_video_probe(struct udevice *dev)
uc_priv->xsize = width;
uc_priv->ysize = height;
/* Optional - in most cases, auto-calculation works */
ret = ofnode_read_u32(node, "stride", &stride);
if (!ret || stride)
uc_priv->line_length = stride;
format = ofnode_read_string(node, "format");
debug("%s: %dx%d@%s\n", __func__, uc_priv->xsize, uc_priv->ysize, format);