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e884b6c3c8
Two defects keep the driver from reporting touches on a board that cannot use the interrupt line. The register write built two messages joined by I2C_M_NOSTART. That puts the same bytes on the wire as a single three byte message, but resuming a transfer without a start condition is optional, and a controller that does not implement it fails the transfer. On the ESP32-P4 every write returned -ETIMEDOUT, so the buffer status clear at 0x814E never reached the controller and gt9xx_read_touch_data() returned an error for every read. Send the register address and the value as a single message. read() returned a full struct touch_sample_s even when the controller reported no contact, with npoints set to zero. A caller that judges the read by its return value takes that for valid data: the LVGL touchscreen driver reads a second sample to decide whether to keep reading, always gets one, so it sets continue_reading on every pass and lv_indev_read() never returns. The display then stops refreshing after the first frame while the touch reads spin. Return -EAGAIN when there is no contact and the file was opened with O_NONBLOCK, which is what the touchscreen upper half does in the same situation. A blocking reader keeps the previous behaviour. While here, add the blank line after the declaration in gt9xx_poll() that nxstyle asks for. It predates this change, but the CI runs checkpatch over every file a commit touches, so it has to go. Signed-off-by: Jorge Guzman <jorge.gzm@gmail.com> |
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| .. | ||
| 1wire | ||
| aie | ||
| analog | ||
| audio | ||
| bch | ||
| can | ||
| clk | ||
| contactless | ||
| coresight | ||
| crypto | ||
| devfreq | ||
| devicetree | ||
| dma | ||
| dummy | ||
| eeprom | ||
| efuse | ||
| i2c | ||
| i2s | ||
| i3c | ||
| input | ||
| ioexpander | ||
| ipcc | ||
| lcd | ||
| leds | ||
| loop | ||
| math | ||
| misc | ||
| mmcsd | ||
| modem | ||
| motor | ||
| mtd | ||
| net | ||
| note | ||
| pci | ||
| pinctrl | ||
| pipes | ||
| power | ||
| rc | ||
| regmap | ||
| reset | ||
| rf | ||
| rpmsg | ||
| rptun | ||
| segger | ||
| sensors | ||
| serial | ||
| spi | ||
| syslog | ||
| thermal | ||
| timers | ||
| usbdev | ||
| usbhost | ||
| usbmisc | ||
| usbmonitor | ||
| usrsock | ||
| vhost | ||
| video | ||
| virtio | ||
| wireless | ||
| .gitignore | ||
| CMakeLists.txt | ||
| drivers_initialize.c | ||
| Kconfig | ||
| Makefile | ||