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Commit e1ce24d1 authored by Suresh Vankadara's avatar Suresh Vankadara Committed by Gerrit - the friendly Code Review server
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msm: camera: icp: Add write barrier in hfi command write 



Add write barrier in hfi command write to make sure
data is ready for firmware to process.

Change-Id: Iba1f7b02c5bcd98dc6e280f4eb2873a7d31ed845
Signed-off-by: default avatarSuresh Vankadara <svankada@codeaurora.org>
parent a418fe22

drivers/media/platform/msm/camera/cam_icp/hfi.c

+12 −0
Original line number Diff line number Diff line
@@ -109,7 +109,19 @@ int hfi_write_cmd(void *cmd_ptr) 
			new_write_idx << BYTE_WORD_SHIFT);

	}



	/*

	 * To make sure command data in a command queue before

	 * updating write index

	 */

	wmb();



	q->qhdr_write_idx = new_write_idx;



	/*

	 * Before raising interrupt make sure command data is ready for

	 * firmware to process

	 */

	wmb();

	cam_io_w((uint32_t)INTR_ENABLE,

		g_hfi->csr_base + HFI_REG_A5_CSR_HOST2ICPINT);

err: