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Commit 47b5ffc6 authored by Chandan Uddaraju's avatar Chandan Uddaraju Committed by Gerrit - the friendly Code Review server
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mdss: dsi: check the clock lane status for overflow recovery sequence 



Implement the overflow recovery sequence only when the clock lane
is not present in stop state. This will prevent from running
the recovery sequence for non fatal overflow errors.

Change-Id: I3a64c9b42d0b112d84f376ab67c6a63c1dc0256e
Signed-off-by: default avatarChandan Uddaraju <chandanu@codeaurora.org>
parent e565ee19

drivers/video/msm/mdss/mdss_dsi.h

+3 −0
Original line number Diff line number Diff line
@@ -176,6 +176,9 @@ enum dsi_pm_type { 
#define DSI_BTA_TERM    BIT(1)

#define DSI_CMD_TERM    BIT(0)



#define DSI_DATA_LANES_STOP_STATE	0xF

#define DSI_CLK_LANE_STOP_STATE		BIT(4)



/* offsets for dynamic refresh */

#define DSI_DYNAMIC_REFRESH_CTRL		0x200

#define DSI_DYNAMIC_REFRESH_PIPE_DELAY		0x204

drivers/video/msm/mdss/mdss_dsi_host.c

+22 −7
Original line number Diff line number Diff line
@@ -1932,7 +1932,7 @@ static int dsi_event_thread(void *data) 
	struct mdss_dsi_ctrl_pdata *ctrl;

	unsigned long flag;

	struct sched_param param;

	u32 todo = 0;

	u32 todo = 0, ln_status;

	int ret;



	param.sched_priority = 16;
@@ -1981,13 +1981,28 @@ static int dsi_event_thread(void *data) 
			mdss_dsi_sw_reset(ctrl, true);



		if (todo & DSI_EV_DLNx_FIFO_OVERFLOW) {

			pr_debug("%s: Handling overflow event\n",

							__func__);

			mutex_lock(&dsi_mtx);

			/*

			 * Run the overflow recovery sequence only when

			 * data lanes are in stop state and

			 * clock lane is not in Stop State.

			 */

			ln_status = MIPI_INP(ctrl->ctrl_base + 0x00a8);

			pr_debug("%s: lane_status: 0x%x\n",

				       __func__, ln_status);

			if (ctrl->recovery

					&& (ln_status

						& DSI_DATA_LANES_STOP_STATE)

					&& !(ln_status

						& DSI_CLK_LANE_STOP_STATE)) {

				pr_debug("%s: Handling overflow event.\n",

								__func__);

				mdss_dsi_clk_ctrl(ctrl, DSI_ALL_CLKS, 1);

				mdss_dsi_ctl_phy_reset(ctrl);

			mdss_dsi_err_intr_ctrl(ctrl, DSI_INTR_ERROR_MASK, 1);

				mdss_dsi_err_intr_ctrl(ctrl,

						DSI_INTR_ERROR_MASK, 1);

				mdss_dsi_clk_ctrl(ctrl, DSI_ALL_CLKS, 0);

			}

			mutex_unlock(&dsi_mtx);

		}