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Commit 6b4bbcba authored by Sagar Dharia's avatar Sagar Dharia
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slimbus: Support push-pull data channel protocol 



Start supporting push-pull data channel protocol in slimbus driver
since the slimbus HW supports it now.

Change-Id: If6b26a696cd2a459a5c5215588711ea037e778ac
Signed-off-by: default avatarSagar Dharia <sdharia@codeaurora.org>
parent 2a4b1904

drivers/slimbus/slim-msm-ngd.c

+2 −0
Original line number Diff line number Diff line
@@ -793,6 +793,8 @@ static int ngd_allocbw(struct slim_device *sb, int *subfrmc, int *clkgear) 
			wbuf[txn.len++] = (u8) (slc->prop.dataf << 5) |

					(sb->laddr & 0x1f);

			wbuf[txn.len] = slc->seglen;

			if (slc->srch && slc->prop.prot == SLIM_PUSH)

				slc->prop.prot = SLIM_PULL;

			if (slc->coeff == SLIM_COEFF_3)

				wbuf[txn.len] |= 1 << 5;

			wbuf[txn.len++] |= slc->prop.auxf << 6;

drivers/slimbus/slimbus.c

+3 −5
Original line number Diff line number Diff line
@@ -1634,7 +1634,7 @@ static u32 slim_calc_prrate(struct slim_controller *ctrl, struct slim_ch *prop) 
	bool done = false;

	enum slim_ch_rate ratefam;



	if (prop->prot >= SLIM_PUSH)

	if (prop->prot >= SLIM_ASYNC_SMPLX)

		return 0;

	if (prop->baser == SLIM_RATE_1HZ) {

		rate = prop->ratem / 4000;
@@ -1753,10 +1753,8 @@ static int slim_nextdefine_ch(struct slim_device *sb, u8 chan) 
	else if (prop->prot == SLIM_AUTO_ISO) {

		if (exact)

			prop->prot = SLIM_HARD_ISO;

		else {

			/* Push-Pull not supported for now */

			return -EPROTONOSUPPORT;

		}

		else

			prop->prot = SLIM_PUSH;

	}

	slc->rootexp = exp;

	slc->seglen = prop->sampleszbits/SLIM_CL_PER_SL;