Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 0ef5a52f authored by Sandeep Panda's avatar Sandeep Panda Committed by raghavendra ambadas
Browse files

msm: mdss: mask DSI FIFO overflow errors during BTA operation 



For some DSI panels where porch values are less, if BTA operation
does not finish in BLLP period, then fake overflow errors are
expected. So disable DSI FIFO overflow errors before triggering
BTA and enable it back once BTA acknowledgment is received for
video mode panels.

Change-Id: If63ac6435f5786c834fe797478c38a9a2f51076b
Signed-off-by: default avatarSandeep Panda <spanda@codeaurora.org>
parent d4d8afe7

drivers/video/msm/mdss/mdss_dsi_host.c

+14 −0
Original line number Diff line number Diff line
@@ -1424,6 +1424,7 @@ int mdss_dsi_bta_status_check(struct mdss_dsi_ctrl_pdata *ctrl_pdata) 
{

	int ret = 0;

	unsigned long flag;

	int ignore_underflow = 0;



	if (ctrl_pdata == NULL) {

		pr_err("%s: Invalid input data\n", __func__);
@@ -1438,6 +1439,9 @@ int mdss_dsi_bta_status_check(struct mdss_dsi_ctrl_pdata *ctrl_pdata) 


	mutex_lock(&ctrl_pdata->cmd_mutex);



	if (ctrl_pdata->panel_mode == DSI_VIDEO_MODE)

		ignore_underflow = 1;



	pr_debug("%s: Checking BTA status\n", __func__);



	mdss_dsi_clk_ctrl(ctrl_pdata, ctrl_pdata->dsi_clk_handle,
@@ -1446,6 +1450,9 @@ int mdss_dsi_bta_status_check(struct mdss_dsi_ctrl_pdata *ctrl_pdata) 
	reinit_completion(&ctrl_pdata->bta_comp);

	mdss_dsi_enable_irq(ctrl_pdata, DSI_BTA_TERM);

	spin_unlock_irqrestore(&ctrl_pdata->mdp_lock, flag);

	/* mask out overflow errors */

	if (ignore_underflow)

		mdss_dsi_set_reg(ctrl_pdata, 0x10c, 0x0f0000, 0x0f0000);

	MIPI_OUTP(ctrl_pdata->ctrl_base + 0x098, 0x01); /* trigger  */

	wmb();
@@ -1456,6 +1463,13 @@ int mdss_dsi_bta_status_check(struct mdss_dsi_ctrl_pdata *ctrl_pdata) 
		pr_err("%s: DSI BTA error: %i\n", __func__, ret);

	}



	if (ignore_underflow) {

		/* clear pending overflow status */

		mdss_dsi_set_reg(ctrl_pdata, 0xc, 0xffffffff, 0x44440000);

		/* restore overflow isr */

		mdss_dsi_set_reg(ctrl_pdata, 0x10c, 0x0f0000, 0);

	}



	mdss_dsi_clk_ctrl(ctrl_pdata, ctrl_pdata->dsi_clk_handle,

			  MDSS_DSI_ALL_CLKS, MDSS_DSI_CLK_OFF);

	pr_debug("%s: BTA done with ret: %d\n", __func__, ret);