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Commit 93331df7 authored by qctecmdr's avatar qctecmdr Committed by Gerrit - the friendly Code Review server
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Merge "disp: msm: dsi: enable DMA cmd scheduling for video mode panels"

parents e60959b0 37b2f80a
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+15 −2
Original line number Diff line number Diff line
@@ -1373,8 +1373,21 @@ static void dsi_kickoff_msg_tx(struct dsi_ctrl *dsi_ctrl,
		dsi_hw_ops.reset_trig_ctrl(&dsi_ctrl->hw,
				&dsi_ctrl->host_config.common_config);

	/* check if custom dma scheduling line needed */
	if (flags & DSI_CTRL_CMD_CUSTOM_DMA_SCHED)
	/*
	 * Always enable DMA scheduling for video mode panel.
	 *
	 * In video mode panel, if the DMA is triggered very close to
	 * the beginning of the active window and the DMA transfer
	 * happens in the last line of VBP, then the HW state will
	 * stay in ‘wait’ and return to ‘idle’ in the first line of VFP.
	 * But somewhere in the middle of the active window, if SW
	 * disables DSI command mode engine while the HW is still
	 * waiting and re-enable after timing engine is OFF. So the
	 * HW never ‘sees’ another vblank line and hence it gets
	 * stuck in the ‘wait’ state.
	 */
	if ((flags & DSI_CTRL_CMD_CUSTOM_DMA_SCHED) ||
		(dsi_ctrl->host_config.panel_mode == DSI_OP_VIDEO_MODE))
		dsi_configure_command_scheduling(dsi_ctrl, cmd_mem);

	dsi_ctrl->cmd_mode = (dsi_ctrl->host_config.panel_mode ==