From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933526AbcK2KJG (ORCPT ); Tue, 29 Nov 2016 05:09:06 -0500 Received: from mx1.redhat.com ([209.132.183.28]:41888 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933427AbcK2KIv (ORCPT ); Tue, 29 Nov 2016 05:08:51 -0500 From: Benjamin Tissoires To: Dmitry Torokhov , Jiri Kosina , Andrew Duggan , Lyude Paul , Nick Dyer , Dennis Wassenberg Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 08/13] Input: synaptics-rmi4 - f03: grab data passed by transport device Date: Tue, 29 Nov 2016 11:08:19 +0100 Message-Id: <1480414104-8524-9-git-send-email-benjamin.tissoires@redhat.com> In-Reply-To: <1480414104-8524-1-git-send-email-benjamin.tissoires@redhat.com> References: <1480414104-8524-1-git-send-email-benjamin.tissoires@redhat.com> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Tue, 29 Nov 2016 10:08:45 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Dennis Wassenberg First check if there are data available passed by the transport device. If data available use these data. If there are no data available try to read the rmi block if dsata are passed this way. This is the way the other rmi function handlers will do this. This patch is needed on HID devices because the firmware reads F03 data registers and adds them to the HID attention report. Reading those registers from the driver after the firmware read them will result in invalid data. Reviewed-by: Andrew Duggan Signed-off-by: Dennis Wassenberg Signed-off-by: Benjamin Tissoires --- drivers/input/rmi4/rmi_f03.c | 37 +++++++++++++++++++++++++++---------- 1 file changed, 27 insertions(+), 10 deletions(-) diff --git a/drivers/input/rmi4/rmi_f03.c b/drivers/input/rmi4/rmi_f03.c index a7e1b98..a124b33 100644 --- a/drivers/input/rmi4/rmi_f03.c +++ b/drivers/input/rmi4/rmi_f03.c @@ -159,6 +159,7 @@ static int rmi_f03_config(struct rmi_function *fn) static int rmi_f03_attention(struct rmi_function *fn, unsigned long *irq_bits) { + struct rmi_device *rmi_dev = fn->rmi_dev; struct f03_data *f03 = dev_get_drvdata(&fn->dev); u16 data_addr = fn->fd.data_base_addr; const u8 ob_len = f03->rx_queue_length * RMI_F03_OB_SIZE; @@ -167,16 +168,32 @@ static int rmi_f03_attention(struct rmi_function *fn, unsigned long *irq_bits) u8 ob_data; unsigned int serio_flags; int i; - int retval; - - /* Grab all of the data registers, and check them for data */ - retval = rmi_read_block(fn->rmi_dev, data_addr + RMI_F03_OB_OFFSET, - &obs, ob_len); - if (retval) { - dev_err(&fn->dev, "%s: Failed to read F03 output buffers.\n", - __func__); - serio_interrupt(f03->serio, 0, SERIO_TIMEOUT); - return retval; + int ret; + + if (!rmi_dev || !rmi_dev->xport) + return -ENODEV; + + if (rmi_dev->xport->attn_data) { + /* First grab the data passed by the transport device */ + if (rmi_dev->xport->attn_size < ob_len) { + dev_warn(&fn->dev, "F03 interrupted, but data is missing!\n"); + return 0; + } + + memcpy(obs, rmi_dev->xport->attn_data, ob_len); + + rmi_dev->xport->attn_data += ob_len; + rmi_dev->xport->attn_size -= ob_len; + } else { + /* Grab all of the data registers, and check them for data */ + ret = rmi_read_block(fn->rmi_dev, data_addr + RMI_F03_OB_OFFSET, + &obs, ob_len); + if (ret) { + dev_err(&fn->dev, "%s: Failed to read F03 output buffers.\n", + __func__); + serio_interrupt(f03->serio, 0, SERIO_TIMEOUT); + return ret; + } } for (i = 0; i < ob_len; i += RMI_F03_OB_SIZE) { -- 2.7.4