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Commit 36f62a6c authored by Venu Raidu's avatar Venu Raidu Committed by vraidu
Browse files

msm: camera_v2: Reset CPP AXI at camera close 



CPP AXI need to be reset during camera close,
to overcome stale data.

Change-Id: I4af43bbf67a84eaa5fc2a722854117a5936ab896
Signed-off-by: default avatarVenu Raidu <vraidu@codeaurora.org>
parent 5598d766

drivers/media/platform/msm/camera_v2/pproc/cpp/msm_cpp.c

+22 −0
Original line number Diff line number Diff line
@@ -1486,6 +1486,8 @@ static int cpp_close_node(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) 
{

	uint32_t i;

	int rc = -1;

	int counter = 0;

	u32 result = 0;

	struct cpp_device *cpp_dev = NULL;

	struct msm_device_queue *processing_q = NULL;

	struct msm_device_queue *eventData_q = NULL;
@@ -1566,6 +1568,26 @@ static int cpp_close_node(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) 
			msm_camera_io_r(cpp_dev->cpp_hw_base + 0x88));

		pr_debug("DEBUG_R1: 0x%x\n",

			msm_camera_io_r(cpp_dev->cpp_hw_base + 0x8C));

		/* mask IRQ status */

		msm_camera_io_w(0xB, cpp_dev->cpp_hw_base + 0xC);



		while (counter < MSM_CPP_AXI_RESET_RETRIES) {

			/* MMSS_A_CPP_AXI_CMD = 0x16C, reset 0x1*/

			msm_camera_io_w(0x1, cpp_dev->cpp_hw_base + 0x16C);

			usleep_range(100, 200);

			result = msm_camera_io_r(cpp_dev->cpp_hw_base + 0x16C);

			if (result & 0x1) {

				pr_debug("CPP AXI reset successful result %d",

					 result);

				break;

			}

			counter++;

		}



		if (!(result & 0x1))

			pr_err("CPP AXI reset un-successful result %d",

				 result);



		msm_camera_io_w(0x0, cpp_dev->base + MSM_CPP_MICRO_CLKEN_CTL);

		msm_cpp_clear_timer(cpp_dev);

		cpp_release_hardware(cpp_dev);

drivers/media/platform/msm/camera_v2/pproc/cpp/msm_cpp.h

+1 −0
Original line number Diff line number Diff line
@@ -92,6 +92,7 @@ 
#define MSM_CPP_START_ADDRESS		0x0

#define MSM_CPP_END_ADDRESS			0x3F00



#define MSM_CPP_AXI_RESET_RETRIES	5

#define MSM_CPP_POLL_RETRIES		200

#define MSM_CPP_TASKLETQ_SIZE		16

#define MSM_CPP_TX_FIFO_LEVEL		16