[media] cx23885, altera-ci: enable all PID's less than 0x20 in hardware PID filter

It takes too long time to scan due to low symbol rate PID's
like PAT, PMT, CAT, NIT.
For that matter we enabled permanently all PID's
less 0x20 in hardware PID filter for NetUP Dual DVB-T/C CI RF card
to combine rates.
Signed-off-by: NIgor M. Liplianin <liplianin@netup.ru>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/cx23885/altera-ci.c

@@ -521,7 +521,8 @@ static void altera_pid_control(struct netup_hw_pid_filter *pid_filt,
 	struct fpga_internal *inter = pid_filt->internal;
 	u8 store = 0;
 
-	if (pid == 0x2000)
+	/* pid 0-0x1f always enabled, don't touch them */
+	if ((pid == 0x2000) || (pid < 0x20))
 		return;
 
 	mutex_lock(&inter->fpga_mutex);
@@ -567,8 +568,9 @@ static void altera_toggle_fullts_streaming(struct netup_hw_pid_filter *pid_filt,
 
 		netup_fpga_op_rw(inter, NETUP_CI_PID_ADDR1,
 				((i >> 8) & 0x03) | (pid_filt->nr << 2), 0);
-
-		netup_fpga_op_rw(inter, NETUP_CI_PID_DATA, store, 0);
+		/* pid 0-0x1f always enabled */
+		netup_fpga_op_rw(inter, NETUP_CI_PID_DATA,
+				(i > 3 ? store : 0), 0);
 	}
 
 	mutex_unlock(&inter->fpga_mutex);