If there is an alpha channel, need to mask in 1's in the alpha channel to prevent the fb from being completely transparent.
Signed-off-by: Rob Clark rob@ti.com --- drivers/gpu/drm/drm_fb_helper.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index 7196620..9190011 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -526,6 +526,11 @@ static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, value = (red << info->var.red.offset) | (green << info->var.green.offset) | (blue << info->var.blue.offset); + if (info->var.transp.length > 0) { + u32 mask = (1 << info->var.transp.length) - 1; + mask <<= info->var.transp.offset; + value |= mask; + } palette[regno] = value; return 0; }