Add support for framebuffers with noncontiguous horizontal lines.
Video drivers can set this value if the hardware requires it.
In case a driver does not set it, the current value of
xres * (bpp / 8) is used instead.
Signed-off-by: Andre Heider <a.hei...@gmail.com>
---
drivers/video/fb.c | 11 +++++++++--
include/fb.h | 1 +
2 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/video/fb.c b/drivers/video/fb.c
index 420e4e3..e80fab9 100644
--- a/drivers/video/fb.c
+++ b/drivers/video/fb.c
@@ -72,12 +72,16 @@ static int fb_setup_mode(struct device_d *dev, struct
param_d *param,
info->xres = info->mode->xres;
info->yres = info->mode->yres;
+ info->stride = 0;
ret = info->fbops->fb_activate_var(info);
+ if (!info->stride)
+ info->stride = info->xres * (info->bits_per_pixel >> 3);
+
if (!ret) {
dev->resource[0].start = (resource_size_t)info->screen_base;
- info->cdev.size = info->xres * info->yres *
(info->bits_per_pixel >> 3);
+ info->cdev.size = info->stride * info->yres;
dev->resource[0].end = dev->resource[0].start + info->cdev.size
- 1;
dev_param_set_generic(dev, param, val);
} else
@@ -122,9 +126,12 @@ int register_framebuffer(struct fb_info *info)
dev = &info->dev;
+ if (!info->stride)
+ info->stride = info->xres * (info->bits_per_pixel >> 3);
+
info->cdev.ops = &fb_ops;
info->cdev.name = asprintf("fb%d", id);
- info->cdev.size = info->xres * info->yres * (info->bits_per_pixel >> 3);
+ info->cdev.size = info->stride * info->yres;
info->cdev.dev = dev;
info->cdev.priv = info;
dev->resource = xzalloc(sizeof(struct resource));
diff --git a/include/fb.h b/include/fb.h
index df4ba8e..ba46954 100644
--- a/include/fb.h
+++ b/include/fb.h
@@ -94,6 +94,7 @@ struct fb_info {
u32 xres; /* visible resolution */
u32 yres;
u32 bits_per_pixel; /* guess what */
+ u32 stride; /* number of bytes in each line */
u32 grayscale; /* != 0 Graylevels instead of colors */
--
1.8.3.2
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