On 31.08.2015 17:19, Alex Deucher wrote:
> AUX addresses are 20 bits long. Send out the entire address instead of
> just the low 16 bits.
>
> Port of:
> drm/radeon/atom: Send out the full AUX address
> to radeon non-atom aux path
>
> Signed-off-by: Alex Deucher
> Cc: stable at vger.kernel.org
Reviewed-by: Christian König for both patches.
> ---
> drivers/gpu/drm/radeon/radeon_dp_auxch.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/radeon/radeon_dp_auxch.c
> b/drivers/gpu/drm/radeon/radeon_dp_auxch.c
> index fcbd60b..3b0c229 100644
> --- a/drivers/gpu/drm/radeon/radeon_dp_auxch.c
> +++ b/drivers/gpu/drm/radeon/radeon_dp_auxch.c
> @@ -116,8 +116,8 @@ radeon_dp_aux_transfer_native(struct drm_dp_aux *aux,
> struct drm_dp_aux_msg *msg
> AUX_SW_WR_BYTES(bytes));
>
> /* write the data header into the registers */
> - /* request, addres, msg size */
> - byte = (msg->request << 4);
> + /* request, address, msg size */
> + byte = (msg->request << 4) | ((msg->address >> 16) & 0xf);
> WREG32(AUX_SW_DATA + aux_offset[instance],
> AUX_SW_DATA_MASK(byte) | AUX_SW_AUTOINCREMENT_DISABLE);
>
