From patchwork Tue Sep 17 09:43:14 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Wang, Jiada" X-Patchwork-Id: 11148465 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A709C912 for ; Tue, 17 Sep 2019 09:43:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 85E2F21881 for ; Tue, 17 Sep 2019 09:43:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729311AbfIQJng (ORCPT ); Tue, 17 Sep 2019 05:43:36 -0400 Received: from esa2.mentor.iphmx.com ([68.232.141.98]:20022 "EHLO esa2.mentor.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729312AbfIQJnf (ORCPT ); Tue, 17 Sep 2019 05:43:35 -0400 IronPort-SDR: 6IU7ZbZaF8TDaxGp2n0mEr8gunvuS3geg/PNWFxzrbTVuheKV3z7c9TruVDRQenY4ih9EyFtGH aUjd2XJjvs1GMCZLKHJGHmQKTrW449ujccwtx3bBoZ777nxVu8c5H0f6V5MKW9x+DLyfhdQvTg OfKAiH90YJBCIc0QPAi6lFrCNPlcpP7NTMExW8jw98DixirtOxHeTqX1ZAKnVsTPr9rwSLv/9T +tGEWajI9HUmoPfqWQB9kfKuoBizqiVfDJdu858gLpnytLmsbWAyJnKlu6dQIBw6DmAyvn/A0C j3U= X-IronPort-AV: E=Sophos;i="5.64,515,1559548800"; d="scan'208";a="41374278" Received: from orw-gwy-01-in.mentorg.com ([192.94.38.165]) by esa2.mentor.iphmx.com with ESMTP; 17 Sep 2019 01:43:33 -0800 IronPort-SDR: 67Bdkcy0lo5wEhmMtLS6x32nBGi/s1zP9s8heoGtJt2zK7FXtkNFieUcrEWDEd6gX7+Bgzgry5 DkRVy/BfQbXkLbXUhLuV3FFAK4clRZOf1mn5i5E8D8Hl+mCKldhggzBiP5oqtdz1MD0bk23lVA OkspHPbLJjbjek9wu1OQSoGNoW+4ZPHrfLvBGIOJaswTeEa3l+rsdJNMXR5qUIMYNYLfwgJfhc 80NzO+FV3CWMOYW40quZugstGIHtOKdus9rKkuAZwmO41gwVdtVkUJ6TsLXfHbRYU/J7Upid1D +YA= From: Jiada Wang To: , , , , CC: , , Subject: [PATCH v3 44/49] Input: Atmel: use T44 object to process T5 messages Date: Tue, 17 Sep 2019 18:43:14 +0900 Message-ID: <20190917094319.18996-1-jiada_wang@mentor.com> X-Mailer: git-send-email 2.19.2 MIME-Version: 1.0 X-ClientProxiedBy: svr-orw-mbx-01.mgc.mentorg.com (147.34.90.201) To svr-orw-mbx-03.mgc.mentorg.com (147.34.90.203) Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org From: Deepak Das T44 object returns the count of valid T5 messages in the buffer. According to atmel, this count should be the main criteria to read the number of T5 messages. Following is the statement from atmel confirming the same :- "For the readout of messages we recommend to stop after the last message is read out from the buffer. One way to identify the amount of new messages is to read T44. The other way is to monitor the /CHG line which indicates independent of mode 0 or mode 1 if there are still data in the buffer. 0xFF indicates that there is no message pending anymore, but it is not recommended to use this as the main criteria to control the data transfer." This commit modifies the logic to readout the T5 messages on the basis of T44 object. Signed-off-by: Deepak Das Signed-off-by: Sanjeev Chugh Signed-off-by: George G. Davis Signed-off-by: Jiada Wang --- drivers/input/touchscreen/atmel_mxt_ts.c | 55 +++++++++++++++--------- 1 file changed, 35 insertions(+), 20 deletions(-) diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c index 93bb19cad7e1..76bda6137bf7 100644 --- a/drivers/input/touchscreen/atmel_mxt_ts.c +++ b/drivers/input/touchscreen/atmel_mxt_ts.c @@ -1489,7 +1489,7 @@ static u8 mxt_max_msg_read_count(struct mxt_data *data, u8 max_T5_msg_count) return min(T5_msg_count_limit, max_T5_msg_count); } -static irqreturn_t mxt_process_messages_t44(struct mxt_data *data) +static int mxt_process_messages_t44(struct mxt_data *data) { struct device *dev = &data->client->dev; int ret; @@ -1502,7 +1502,7 @@ static irqreturn_t mxt_process_messages_t44(struct mxt_data *data) data->T5_msg_size + 1, data->msg_buf); if (ret) { dev_err(dev, "Failed to read T44 and T5 (%d)\n", ret); - return IRQ_NONE; + return ret; } T5_msg_count = data->msg_buf[0]; @@ -1512,7 +1512,7 @@ static irqreturn_t mxt_process_messages_t44(struct mxt_data *data) * Mode 0. It results in unnecessary I2C operations but it is benign. */ if (!T5_msg_count) - return IRQ_NONE; + return processed_valid; if (T5_msg_count > data->max_reportid) { dev_warn(dev, "T44 count %d exceeded max report id\n", @@ -1524,12 +1524,14 @@ static irqreturn_t mxt_process_messages_t44(struct mxt_data *data) ret = mxt_proc_message(data, data->msg_buf + 1); if (ret < 0) { dev_warn(dev, "Unexpected invalid message\n"); - return IRQ_NONE; + return ret; } total_pending = T5_msg_count - 1; - if (!total_pending) + if (!total_pending) { + processed_valid = 1; goto end; + } /* Process remaining messages if necessary */ T5_msg_count = mxt_max_msg_read_count(data, total_pending); @@ -1553,7 +1555,7 @@ static irqreturn_t mxt_process_messages_t44(struct mxt_data *data) data->update_input = false; } - return IRQ_HANDLED; + return processed_valid; } static int mxt_process_messages_until_invalid(struct mxt_data *data) @@ -1583,7 +1585,7 @@ static int mxt_process_messages_until_invalid(struct mxt_data *data) return -EBUSY; } -static irqreturn_t mxt_process_messages(struct mxt_data *data) +static int mxt_process_messages(struct mxt_data *data) { int total_handled, num_handled; u8 count = data->last_message_count; @@ -1594,7 +1596,7 @@ static irqreturn_t mxt_process_messages(struct mxt_data *data) /* include final invalid message */ total_handled = mxt_read_and_process_messages(data, count + 1); if (total_handled < 0) - return IRQ_NONE; + return total_handled; /* if there were invalid messages, then we are done */ else if (total_handled <= count) goto update_count; @@ -1603,7 +1605,7 @@ static irqreturn_t mxt_process_messages(struct mxt_data *data) do { num_handled = mxt_read_and_process_messages(data, 2); if (num_handled < 0) - return IRQ_NONE; + return num_handled; total_handled += num_handled; @@ -1619,12 +1621,13 @@ static irqreturn_t mxt_process_messages(struct mxt_data *data) data->update_input = false; } - return IRQ_HANDLED; + return total_handled; } static irqreturn_t mxt_interrupt(int irq, void *dev_id) { struct mxt_data *data = dev_id; + int ret; if (data->in_bootloader) { complete(&data->chg_completion); @@ -1632,17 +1635,22 @@ static irqreturn_t mxt_interrupt(int irq, void *dev_id) if (data->flash && &data->flash->work) cancel_delayed_work_sync(&data->flash->work); - return IRQ_RETVAL(mxt_check_bootloader(data)); + ret = mxt_check_bootloader(data); + return IRQ_RETVAL(ret); } if (!data->object_table) return IRQ_HANDLED; - if (data->T44_address) { - return mxt_process_messages_t44(data); - } else { - return mxt_process_messages(data); - } + if (data->T44_address) + ret = mxt_process_messages_t44(data); + else + ret = mxt_process_messages(data); + + if (ret <= 0) + return IRQ_NONE; + else + return IRQ_HANDLED; } static int mxt_t6_command(struct mxt_data *data, u16 cmd_offset, @@ -1777,8 +1785,11 @@ static int mxt_acquire_irq(struct mxt_data *data) } if (data->object_table && data->use_retrigen_workaround) { - error = mxt_process_messages_until_invalid(data); - if (error) + if (data->T44_address) + error = mxt_process_messages_t44(data); + else + error = mxt_process_messages_until_invalid(data); + if (error < 0) return error; } @@ -4032,8 +4043,12 @@ static int mxt_start(struct mxt_data *data) * Discard any touch messages still in message buffer * from before chip went to sleep */ - ret = mxt_process_messages_until_invalid(data); - if (ret) + + if (data->T44_address) + ret = mxt_process_messages_t44(data); + else + ret = mxt_process_messages_until_invalid(data); + if (ret < 0) break; ret = mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);