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drm/omap: fix pitch round-up 

At the moment we calculate the buffer's pitch with:

  pitch = width * DIV_ROUND_UP(bpp, 8)

For CLUT modes with bpp of 1/2/4/8 this gives wrong result, and the
correct pitch is:

  pitch = DIV_ROUND_UP(width * bpp, 8)

In practice this doesn't change anything, as we don't support CLUT
modes, but it's better to have the pitch calculation correct.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
This commit is contained in:
Tomi Valkeinen 2016-04-19 09:06:32 +03:00
parent 6a5228fdf0
commit ce481edad4
2 changed files with 3 additions and 3 deletions
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4
drivers/gpu/drm/omapdrm/omap_fbdev.c
View File

@ -125,8 +125,8 @@ static int omap_fbdev_create(struct drm_fb_helper *helper,
mode_cmd.width = sizes->surface_width;
mode_cmd.height = sizes->surface_height;
mode_cmd.pitches[0] = mode_cmd.width *
DIV_ROUND_UP(sizes->surface_bpp, 8);
mode_cmd.pitches[0] =
DIV_ROUND_UP(mode_cmd.width * sizes->surface_bpp, 8);
fbdev->ywrap_enabled = priv->has_dmm && ywrap_enabled;
if (fbdev->ywrap_enabled) {

2
drivers/gpu/drm/omapdrm/omap_gem.c
View File

@ -661,7 +661,7 @@ int omap_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
{
union omap_gem_size gsize;
args->pitch = args->width * DIV_ROUND_UP(args->bpp, 8);
args->pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
args->size = PAGE_ALIGN(args->pitch * args->height);