Commit 37c9399e authored Nov 08, 2016 by Shilpa Mamidi Committed by Gerrit - the friendly Code Review server Nov 07, 2016

msm: isp: Clear irq status if irq is set again with same value



Sometimes HW is giving same irq twice even after clearing
irq. As workaround HW team suggested to read back irq
after clearing and if read back irq is same as before clear
then we need to clear register again.

Change-Id: I79cecfa1c61c6224b8f9cef8146a2bb44a7522e8
Signed-off-by: Shilpa Mamidi <shilpam@codeaurora.org>

parent 133406eb

drivers/media/platform/msm/camera_v2/isp/msm_isp40.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -572,6 +572,11 @@ static void msm_vfe40_read_irq_status_and_clear(struct vfe_device *vfe_dev,

		*irq_status0 &= vfe_dev->irq0_mask;
		*irq_status1 &= vfe_dev->irq1_mask;
		if (*irq_status0 &&
		(*irq_status0 == msm_camera_io_r(vfe_dev->vfe_base + 0x38))) {
		msm_camera_io_w(*irq_status0, vfe_dev->vfe_base + 0x30);
		msm_camera_io_w_mb(1, vfe_dev->vfe_base + 0x24);
		}

		if (*irq_status1 & (1 << 0)) {
		vfe_dev->error_info.camif_status =