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Commit e46e64a5 authored by Asutosh Das's avatar Asutosh Das Committed by Sahitya Tummala
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mmc: cmdq: decrease the QSR polling period 



Configure the controller to send the QSR at 1 clock period.
This would send SQS(CMD13) when no data transfer is in
progress. This decrease in the polling period increases the
performance of the device.

CRs-fixed: 891366
Change-Id: Ic2807c6334a778b5f0c89fb605c6923a44f7624a
Signed-off-by: default avatarAsutosh Das <asutoshd@codeaurora.org>
Signed-off-by: default avatarSahitya Tummala <stummala@codeaurora.org>
parent 9c186765

drivers/mmc/host/cmdq_hci.c

+1 −2
Original line number Original line Diff line number Diff line
@@ -357,8 +357,7 @@ static int cmdq_enable(struct mmc_host *mmc) 
	cmdq_writel(cq_host, mmc->card->rca, CQSSC2);

	cmdq_writel(cq_host, mmc->card->rca, CQSSC2);





	/* send QSR at lesser intervals than the default */

	/* send QSR at lesser intervals than the default */

	cmdq_writel(cq_host, cmdq_readl(cq_host, CQSSC1) | SEND_QSR_INTERVAL,

	cmdq_writel(cq_host, SEND_QSR_INTERVAL, CQSSC1);

				CQSSC1);





	/* enable bkops exception indication */

	/* enable bkops exception indication */

	if (mmc_card_configured_manual_bkops(mmc->card) &&

	if (mmc_card_configured_manual_bkops(mmc->card) &&

drivers/mmc/host/cmdq_hci.h

+1 −1
Original line number Original line Diff line number Diff line
@@ -78,7 +78,7 @@ 
 * Value n means CQE would send CMD13 during the transfer of data block

 * Value n means CQE would send CMD13 during the transfer of data block

 * BLOCK_CNT-n

 * BLOCK_CNT-n

 */

 */

#define SEND_QSR_INTERVAL 0x70000

#define SEND_QSR_INTERVAL 0x70001





/* send status config 2 */

/* send status config 2 */

#define CQSSC2		0x44

#define CQSSC2		0x44