drm/display: dp-tunnel: use new DCPD access helpers

Switch drm_dp_tunnel.c to use new set of DPCD read / write helpers.

Reviewed-by: Lyude Paul <lyude@redhat.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20250324-drm-rework-dpcd-access-v4-6-e80ff89593df@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>

Author: lumag

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;
@@ -913,15 +913,15 @@ 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)
 		val |= mask;
 	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))