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Commit 55624c7f authored by Mao Jinlong's avatar Mao Jinlong
Browse files

byte-cntr: Set offset as rwp offset when sw usb mode start 



Set offset as rwp offset when sw usb mode start to avoid the data
transfer delay issue. If use etr_buf offset as initial offset,
there will be interval between rwp offset and initial offset.
Then the delay will happen.

Change-Id: I92b4326a4c38384f68bd0c60f3b487d80b334325
Signed-off-by: default avatarMao Jinlong <jinlmao@codeaurora.org>
parent e2acc023

drivers/hwtracing/coresight/coresight-byte-cntr.c

+5 −2
Original line number Diff line number Diff line
@@ -200,7 +200,7 @@ int usb_bypass_start(struct byte_cntr *byte_cntr_data) 
	}



	atomic_set(&byte_cntr_data->usb_free_buf, USB_BUF_NUM);

	byte_cntr_data->offset = tmcdrvdata->etr_buf->offset;

	byte_cntr_data->offset = tmc_sg_get_rwp_offset(tmcdrvdata);

	byte_cntr_data->read_active = true;

	/*

	 * IRQ is a '8- byte' counter and to observe interrupt at
@@ -386,6 +386,7 @@ static void usb_read_work_fn(struct work_struct *work) 
	struct qdss_request *usb_req = NULL;

	struct etr_buf *etr_buf = tmcdrvdata->etr_buf;

	size_t actual, req_size, req_sg_num, small_size = 0;

	size_t actual_total = 0;

	char *buf;

	struct byte_cntr *drvdata =

		container_of(work, struct byte_cntr, read_work);
@@ -416,6 +417,7 @@ static void usb_read_work_fn(struct work_struct *work) 


		req_size = USB_BLK_SIZE - small_size;

		small_size = 0;

		actual_total = 0;



		if (req_size > 0) {

			seq++;
@@ -460,9 +462,10 @@ static void usb_read_work_fn(struct work_struct *work) 
					drvdata->offset = 0;

				else

					drvdata->offset += actual;

				actual_total += actual;

			}



			usb_req->length = req_size;

			usb_req->length = actual_total;

			drvdata->usb_req = usb_req;

			usb_req->num_sgs = i;