Commit 4072ee77 authored Jan 20, 2017 by Vishnuvardhan Prodduturi

msm: mdss: do not report overflow errors during read commands

During a DSI DMA read command transaction, it is expected to have
DSI FIFO overflow if the read operation duration exceeds one BLLP
line time frame. Make sure not to trigger DSI FIFO overflow recovery
sequence for such cases where DSI FIFO overflow error is masked.

Change-Id: I0762a0f51d580a44cfa24ffac60cc465c241c733
Signed-off-by: Padmanabhan Komanduru <pkomandu@codeaurora.org>
Signed-off-by: Vishnuvardhan Prodduturi <vproddut@codeaurora.org>

parent d1a2e03e

drivers/video/fbdev/msm/mdss_dsi_host.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -3044,6 +3044,13 @@ static bool mdss_dsi_fifo_status(struct mdss_dsi_ctrl_pdata *ctrl)

		pr_err("%s: status=%x\n", __func__, status);

		/*
		* if DSI FIFO overflow is masked,
		* do not report overflow error
		*/
		if (MIPI_INP(base + 0x10c) & 0xf0000)
		status = status & 0xaaaaffff;

		if (status & 0x44440000) {/* DLNx_HS_FIFO_OVERFLOW */
		dsi_send_events(ctrl, DSI_EV_DLNx_FIFO_OVERFLOW, 0);
		/* Ignore FIFO EMPTY when overflow happens */