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Commit 9d8b6ff2 authored by Ashok Vuyyuru's avatar Ashok Vuyyuru
Browse files

msm: ipa3: Adding chnages to update event RP from DDR 



In suspend scenario while checking channel empty scenario
updating the event ring RP pointer from direct register, it
may cause mismatch in reading in polling context. To avoid
discrepancy  reading RP pointer DDR location.

Change-Id: Ie198ea9ace033e31463acd974f10dccdcac45c55
Signed-off-by: default avatarAshok Vuyyuru <avuyyuru@codeaurora.org>
parent e74ef506

drivers/platform/msm/gsi/gsi.c

+6 −2
Original line number Diff line number Diff line
@@ -3652,6 +3652,7 @@ EXPORT_SYMBOL(gsi_query_channel_info); 
int gsi_is_channel_empty(unsigned long chan_hdl, bool *is_empty)

{

	struct gsi_chan_ctx *ctx;

	struct gsi_evt_ctx *ev_ctx;

	spinlock_t *slock;

	unsigned long flags;

	uint64_t rp;
@@ -3687,8 +3688,11 @@ int gsi_is_channel_empty(unsigned long chan_hdl, bool *is_empty) 
	spin_lock_irqsave(slock, flags);



	if (ctx->props.dir == GSI_CHAN_DIR_FROM_GSI && ctx->evtr) {

		rp = gsi_readl(gsi_ctx->base +

			GSI_EE_n_EV_CH_k_CNTXT_4_OFFS(ctx->evtr->id, ee));

		ev_ctx = &gsi_ctx->evtr[ctx->evtr->id];

		/* Read the event ring rp from DDR to avoid mismatch */

		rp = ev_ctx->props.gsi_read_event_ring_rp(&ev_ctx->props,

					ev_ctx->id, ee);



		rp |= ctx->evtr->ring.rp & 0xFFFFFFFF00000000;

		ctx->evtr->ring.rp = rp;