Reviewed-by: Lyude Paul <ly...@redhat.com>

On Fri, 2025-01-17 at 10:56 +0200, Dmitry Baryshkov wrote:
> Switch drm_dp_tunnel.c to use new set of DPCD read / write helpers.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org>
> ---
>  drivers/gpu/drm/display/drm_dp_tunnel.c | 20 ++++++++++----------
>  1 file changed, 10 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/gpu/drm/display/drm_dp_tunnel.c 
> b/drivers/gpu/drm/display/drm_dp_tunnel.c
> index 
> 48b2df120086c9b64f7d8b732c9f1f32f7b50fbd..4ef1f20bfe4a0648a92345a80fc6658ab23c5003
>  100644
> --- a/drivers/gpu/drm/display/drm_dp_tunnel.c
> +++ b/drivers/gpu/drm/display/drm_dp_tunnel.c
> @@ -222,7 +222,7 @@ static int read_tunnel_regs(struct drm_dp_aux *aux, 
> struct drm_dp_tunnel_regs *r
>       while ((len = next_reg_area(&offset))) {
>               int address = DP_TUNNELING_BASE + offset;
>  
> -             if (drm_dp_dpcd_read(aux, address, tunnel_reg_ptr(regs, 
> address), len) < 0)
> +             if (drm_dp_dpcd_read_data(aux, address, tunnel_reg_ptr(regs, 
> address), len) < 0)
>                       return -EIO;
>  
>               offset += len;
> @@ -913,7 +913,7 @@ static int set_bw_alloc_mode(struct drm_dp_tunnel 
> *tunnel, bool enable)
>       u8 mask = DP_DISPLAY_DRIVER_BW_ALLOCATION_MODE_ENABLE | 
> DP_UNMASK_BW_ALLOCATION_IRQ;
>       u8 val;
>  
> -     if (drm_dp_dpcd_readb(tunnel->aux, DP_DPTX_BW_ALLOCATION_MODE_CONTROL, 
> &val) < 0)
> +     if (drm_dp_dpcd_read_byte(tunnel->aux, 
> DP_DPTX_BW_ALLOCATION_MODE_CONTROL, &val) < 0)
>               goto out_err;
>  
>       if (enable)
> @@ -921,7 +921,7 @@ static int set_bw_alloc_mode(struct drm_dp_tunnel 
> *tunnel, bool enable)
>       else
>               val &= ~mask;
>  
> -     if (drm_dp_dpcd_writeb(tunnel->aux, DP_DPTX_BW_ALLOCATION_MODE_CONTROL, 
> val) < 0)
> +     if (drm_dp_dpcd_write_byte(tunnel->aux, 
> DP_DPTX_BW_ALLOCATION_MODE_CONTROL, val) < 0)
>               goto out_err;
>  
>       tunnel->bw_alloc_enabled = enable;
> @@ -1039,7 +1039,7 @@ static int clear_bw_req_state(struct drm_dp_aux *aux)
>  {
>       u8 bw_req_mask = DP_BW_REQUEST_SUCCEEDED | DP_BW_REQUEST_FAILED;
>  
> -     if (drm_dp_dpcd_writeb(aux, DP_TUNNELING_STATUS, bw_req_mask) < 0)
> +     if (drm_dp_dpcd_write_byte(aux, DP_TUNNELING_STATUS, bw_req_mask) < 0)
>               return -EIO;
>  
>       return 0;
> @@ -1052,7 +1052,7 @@ static int bw_req_complete(struct drm_dp_aux *aux, bool 
> *status_changed)
>       u8 val;
>       int err;
>  
> -     if (drm_dp_dpcd_readb(aux, DP_TUNNELING_STATUS, &val) < 0)
> +     if (drm_dp_dpcd_read_byte(aux, DP_TUNNELING_STATUS, &val) < 0)
>               return -EIO;
>  
>       *status_changed = val & status_change_mask;
> @@ -1095,7 +1095,7 @@ static int allocate_tunnel_bw(struct drm_dp_tunnel 
> *tunnel, int bw)
>       if (err)
>               goto out;
>  
> -     if (drm_dp_dpcd_writeb(tunnel->aux, DP_REQUEST_BW, request_bw) < 0) {
> +     if (drm_dp_dpcd_write_byte(tunnel->aux, DP_REQUEST_BW, request_bw) < 0) 
> {
>               err = -EIO;
>               goto out;
>       }
> @@ -1196,13 +1196,13 @@ static int check_and_clear_status_change(struct 
> drm_dp_tunnel *tunnel)
>       u8 mask = DP_BW_ALLOCATION_CAPABILITY_CHANGED | DP_ESTIMATED_BW_CHANGED;
>       u8 val;
>  
> -     if (drm_dp_dpcd_readb(tunnel->aux, DP_TUNNELING_STATUS, &val) < 0)
> +     if (drm_dp_dpcd_read_byte(tunnel->aux, DP_TUNNELING_STATUS, &val) < 0)
>               goto out_err;
>  
>       val &= mask;
>  
>       if (val) {
> -             if (drm_dp_dpcd_writeb(tunnel->aux, DP_TUNNELING_STATUS, val) < 
> 0)
> +             if (drm_dp_dpcd_write_byte(tunnel->aux, DP_TUNNELING_STATUS, 
> val) < 0)
>                       goto out_err;
>  
>               return 1;
> @@ -1215,7 +1215,7 @@ static int check_and_clear_status_change(struct 
> drm_dp_tunnel *tunnel)
>        * Check for estimated BW changes explicitly to account for lost
>        * BW change notifications.
>        */
> -     if (drm_dp_dpcd_readb(tunnel->aux, DP_ESTIMATED_BW, &val) < 0)
> +     if (drm_dp_dpcd_read_byte(tunnel->aux, DP_ESTIMATED_BW, &val) < 0)
>               goto out_err;
>  
>       if (val * tunnel->bw_granularity != tunnel->estimated_bw)
> @@ -1300,7 +1300,7 @@ int drm_dp_tunnel_handle_irq(struct drm_dp_tunnel_mgr 
> *mgr, struct drm_dp_aux *a
>  {
>       u8 val;
>  
> -     if (drm_dp_dpcd_readb(aux, DP_TUNNELING_STATUS, &val) < 0)
> +     if (drm_dp_dpcd_read_byte(aux, DP_TUNNELING_STATUS, &val) < 0)
>               return -EIO;
>  
>       if (val & (DP_BW_REQUEST_SUCCEEDED | DP_BW_REQUEST_FAILED))
> 

-- 
Cheers,
 Lyude Paul (she/her)
 Software Engineer at Red Hat

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