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path: root/drivers/input/rmi4
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Diffstat (limited to 'drivers/input/rmi4')
-rw-r--r--drivers/input/rmi4/rmi_f03.c35
1 files changed, 26 insertions, 9 deletions
diff --git a/drivers/input/rmi4/rmi_f03.c b/drivers/input/rmi4/rmi_f03.c
index 24c7375aa361..7a3ec0ed0c27 100644
--- a/drivers/input/rmi4/rmi_f03.c
+++ b/drivers/input/rmi4/rmi_f03.c
@@ -163,6 +163,7 @@ 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;
@@ -173,15 +174,31 @@ static int rmi_f03_attention(struct rmi_function *fn, unsigned long *irq_bits)
int i;
int error;
- /* Grab all of the data registers, and check them for data */
- error = rmi_read_block(fn->rmi_dev, data_addr + RMI_F03_OB_OFFSET,
- &obs, ob_len);
- if (error) {
- dev_err(&fn->dev,
- "%s: Failed to read F03 output buffers: %d\n",
- __func__, error);
- serio_interrupt(f03->serio, 0, SERIO_TIMEOUT);
- return error;
+ 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 */
+ error = rmi_read_block(fn->rmi_dev, data_addr + RMI_F03_OB_OFFSET,
+ &obs, ob_len);
+ if (error) {
+ dev_err(&fn->dev,
+ "%s: Failed to read F03 output buffers: %d\n",
+ __func__, error);
+ serio_interrupt(f03->serio, 0, SERIO_TIMEOUT);
+ return error;
+ }
}
for (i = 0; i < ob_len; i += RMI_F03_OB_SIZE) {