John Keeping <jkeeping@xxxxxxxxxxxxxxxxx> writes:
> The ssd132x buffer is encoded one pixel per nibble, with two pixels in
> each byte. When encoding and 8-bit greyscale input, take the top 4-bits
I think the correct phrase is "encoding an 8-bit" ?
> as the value and ensure the two pixels are distinct and do not overwrite
> each other.
>
Fixes: fdd591e00a9c ("drm/ssd130x: Add support for the SSD132x OLED controller family")
> Signed-off-by: John Keeping <jkeeping@xxxxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/solomon/ssd130x.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/solomon/ssd130x.c b/drivers/gpu/drm/solomon/ssd130x.c
> index 2622172228361..64f1123080996 100644
> --- a/drivers/gpu/drm/solomon/ssd130x.c
> +++ b/drivers/gpu/drm/solomon/ssd130x.c
> @@ -880,7 +880,7 @@ static int ssd132x_update_rect(struct ssd130x_device *ssd130x,
> u8 n1 = buf[i * width + j];
> u8 n2 = buf[i * width + j + 1];
>
> - data_array[array_idx++] = (n2 << 4) | n1;
> + data_array[array_idx++] = (n2 & 0xf0) | (n1 >> 4);
> }
> }
Reviewed-by: Javier Martinez Canillas <javierm@xxxxxxxxxx>
--
Best regards,
Javier Martinez Canillas
Core Platforms
Red Hat
