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Message-ID:
<DB8PR04MB693958107D4F60467DB7B4529499A@DB8PR04MB6939.eurprd04.prod.outlook.com>
Date: Thu, 22 May 2025 02:05:01 +0000
From: Joseph Guo <qijian.guo@....com>
To: Hans de Goede <hdegoede@...hat.com>, Bastien Nocera <hadess@...ess.net>,
Dmitry Torokhov <dmitry.torokhov@...il.com>, "open list:GOODIX TOUCHSCREEN"
<linux-input@...r.kernel.org>, open list <linux-kernel@...r.kernel.org>
CC: Bough Chen <haibo.chen@....com>, Justin Jiang <justin.jiang@....com>
Subject:
回复: [EXT] Re: [PATCH] input: goodix: add poll mode for goodix touchscreen
Hi Hans,
Thanks for your great comment. I already made the change in v3.
Best Regards.
Joseph
-----邮件原件-----
发件人: Hans de Goede <hdegoede@...hat.com>
发送时间: Wednesday, May 21, 2025 5:20 PM
收件人: Joseph Guo <qijian.guo@....com>; Bastien Nocera <hadess@...ess.net>; Dmitry Torokhov <dmitry.torokhov@...il.com>; open list:GOODIX TOUCHSCREEN <linux-input@...r.kernel.org>; open list <linux-kernel@...r.kernel.org>
抄送: Bough Chen <haibo.chen@....com>; Justin Jiang <justin.jiang@....com>
主题: [EXT] Re: [PATCH] input: goodix: add poll mode for goodix touchscreen
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Hi Joseph,
Thank you for the new version.
For the next version, the subject here should have been "[PATCH v2] input: ...".
You can do this by doing e.g. :
git format-patch -v2 HEAD~
git send-email v2-0001-....patch
On 21-May-25 4:50 AM, Joseph Guo wrote:
> goodix touchscreen only support interrupt mode by default.
> Some panels like waveshare panel which is widely used on raspeberry pi
> don't have interrupt pins and only work on i2c poll mode.
> The waveshare panel 7inch panel use goodix gt911 touchscreen chip.
>
> Signed-off-by: Joseph Guo <qijian.guo@....com>
> Reviewed-by: Haibo Chen <haibo.chen@....com>
> ---
> Change from v1 to v2
> - Remove unused variable in goodix_ts_data struct
> - Use polling infrastructure
> ---
> drivers/input/touchscreen/goodix.c | 50
> ++++++++++++++++++++++++++----
> 1 file changed, 44 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/input/touchscreen/goodix.c
> b/drivers/input/touchscreen/goodix.c
> index aaf79ac50004..58e49e5cf148 100644
> --- a/drivers/input/touchscreen/goodix.c
> +++ b/drivers/input/touchscreen/goodix.c
> @@ -47,6 +47,7 @@
> #define RESOLUTION_LOC 1
> #define MAX_CONTACTS_LOC 5
> #define TRIGGER_LOC 6
> +#define GOODIX_POLL_INTERVAL_MS 17 /* 17ms = 60fps */
>
> /* Our special handling for GPIO accesses through ACPI is x86
> specific */ #if defined CONFIG_X86 && defined CONFIG_ACPI @@ -497,6
> +498,14 @@ static void goodix_process_events(struct goodix_ts_data *ts)
> input_sync(ts->input_dev);
> }
>
> +static void goodix_ts_work_i2c_poll(struct input_dev *input) {
> + struct goodix_ts_data *ts = input_get_drvdata(input);
> +
> + goodix_process_events(ts);
> + goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0); }
> +
> /**
> * goodix_ts_irq_handler - The IRQ handler
> *
> @@ -523,16 +532,33 @@ static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id)
> return IRQ_HANDLED;
> }
>
> +static void goodix_enable_irq(struct goodix_ts_data *ts) {
> + if (ts->client->irq)
> + enable_irq(ts->client->irq); }
> +
> +static void goodix_disable_irq(struct goodix_ts_data *ts) {
> + if (ts->client->irq)
> + disable_irq(ts->client->irq); }
> +
> static void goodix_free_irq(struct goodix_ts_data *ts) {
> - devm_free_irq(&ts->client->dev, ts->client->irq, ts);
> + if (ts->client->irq)
> + devm_free_irq(&ts->client->dev, ts->client->irq, ts);
> }
>
> static int goodix_request_irq(struct goodix_ts_data *ts) {
> - return devm_request_threaded_irq(&ts->client->dev, ts->client->irq,
> - NULL, goodix_ts_irq_handler,
> - ts->irq_flags, ts->client->name, ts);
> + if (ts->client->irq) {
> + return devm_request_threaded_irq(&ts->client->dev, ts->client->irq,
> + NULL, goodix_ts_irq_handler,
> + ts->irq_flags, ts->client->name, ts);
> + }
> + else
> + return 0;
> }
The '}' here is wrongly indented, also if you use {}, which is not strictly necessary here, please use them in both branches of the if.
Since in this function we're dealing with a multi-line statement I think it might be better to write this as:
static int goodix_request_irq(struct goodix_ts_data *ts) {
if (!ts->client->irq)
return 0;
return devm_request_threaded_irq(&ts->client->dev, ts->client->irq,
NULL, goodix_ts_irq_handler,
ts->irq_flags, ts->client->name, ts); }
This will also make the diff smaller.
Or you can keep what you have and drop the {}.
Regards,
Hans
> static int goodix_check_cfg_8(struct goodix_ts_data *ts, const u8
> *cfg, int len) @@ -1229,6 +1255,18 @@ static int goodix_configure_dev(struct goodix_ts_data *ts)
> return error;
> }
>
> + input_set_drvdata(ts->input_dev, ts);
> +
> + if (!ts->client->irq) {
> + error = input_setup_polling(ts->input_dev, goodix_ts_work_i2c_poll);
> + if (error) {
> + dev_err(&ts->client->dev,
> + "could not set up polling mode, %d\n", error);
> + return error;
> + }
> + input_set_poll_interval(ts->input_dev, GOODIX_POLL_INTERVAL_MS);
> + }
> +
> error = input_register_device(ts->input_dev);
> if (error) {
> dev_err(&ts->client->dev, @@ -1435,7 +1473,7 @@ static
> int goodix_suspend(struct device *dev)
>
> /* We need gpio pins to suspend/resume */
> if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) {
> - disable_irq(client->irq);
> + goodix_disable_irq(ts);
> return 0;
> }
>
> @@ -1479,7 +1517,7 @@ static int goodix_resume(struct device *dev)
> int error;
>
> if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) {
> - enable_irq(client->irq);
> + goodix_enable_irq(ts);
> return 0;
> }
>
> --
> 2.34.1
>
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