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Commit 089a3a18 authored by Vineet Bajaj's avatar Vineet Bajaj
Browse files

msm: mdss: Avoid unclocked register access with dsi_event_thread 



In the case when ESD status check fails with DSI ACK
errors, there is a chance of unclocked register access when
DSI_INTR_CTRL register is being set.

Change-Id: I629b4ec642a86369b6ed693bdc6f8b4260ec1f5d
Signed-off-by: default avatarVineet Bajaj <vbajaj@codeaurora.org>
parent ca30ec37

drivers/video/msm/mdss/mdss_dsi_host.c

+4 −0
Original line number Diff line number Diff line
@@ -1350,8 +1350,10 @@ static int dsi_event_thread(void *data) 


		if (todo & DSI_EV_MDP_FIFO_UNDERFLOW) {

			if (ctrl->recovery) {

				mdss_dsi_clk_ctrl(ctrl, DSI_ALL_CLKS, 1);

				mdss_dsi_sw_reset_restore(ctrl);

				ctrl->recovery->fxn(ctrl->recovery->data);

				mdss_dsi_clk_ctrl(ctrl, DSI_ALL_CLKS, 0);

			}

		}
@@ -1363,7 +1365,9 @@ static int dsi_event_thread(void *data) 
			spin_unlock_irqrestore(&ctrl->mdp_lock, flag);



			/* enable dsi error interrupt */

			mdss_dsi_clk_ctrl(ctrl, DSI_ALL_CLKS, 1);

			mdss_dsi_err_intr_ctrl(ctrl, DSI_INTR_ERROR_MASK, 1);

			mdss_dsi_clk_ctrl(ctrl, DSI_ALL_CLKS, 0);

		}



	}