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

Commit 5c51ea60 authored by Sandeep Panda's avatar Sandeep Panda
Browse files

drm/msm/dsi-staging: trigger dma command during video active region 



For dsi video mode use case when engine is transmitting pixel data
then as per recommendation wait for video frame done interrupt and
then ensure dsi engine is in active region to queue the dma command.

Change-Id: I19bc38eb149ad3ea92d6659b8684fc7d202427ac
Signed-off-by: default avatarSandeep Panda <spanda@codeaurora.org>
parent e08dfa6b

drivers/gpu/drm/msm/dsi-staging/dsi_ctrl.c

+35 −0
Original line number Diff line number Diff line
@@ -38,6 +38,8 @@ 
#define DSI_CTRL_TX_TO_MS     200



#define TO_ON_OFF(x) ((x) ? "ON" : "OFF")



#define CEIL(x, y)              (((x) + ((y)-1)) / (y))

/**

 * enum dsi_ctrl_driver_ops - controller driver ops

 */
@@ -890,6 +892,38 @@ static int dsi_ctrl_copy_and_pad_cmd(struct dsi_ctrl *dsi_ctrl, 
	return rc;

}



static void dsi_ctrl_wait_for_video_done(struct dsi_ctrl *dsi_ctrl)

{

	u32 v_total = 0, v_blank = 0, sleep_ms = 0, fps = 0, ret;

	struct dsi_mode_info *timing;



	if (dsi_ctrl->host_config.panel_mode != DSI_OP_VIDEO_MODE)

		return;



	dsi_ctrl->hw.ops.clear_interrupt_status(&dsi_ctrl->hw,

				DSI_VIDEO_MODE_FRAME_DONE);



	dsi_ctrl_enable_status_interrupt(dsi_ctrl,

				DSI_SINT_VIDEO_MODE_FRAME_DONE, NULL);

	reinit_completion(&dsi_ctrl->irq_info.vid_frame_done);

	ret = wait_for_completion_timeout(

			&dsi_ctrl->irq_info.vid_frame_done,

			msecs_to_jiffies(DSI_CTRL_TX_TO_MS));

	if (ret <= 0)

		pr_debug("wait for video done failed\n");

	dsi_ctrl_disable_status_interrupt(dsi_ctrl,

				DSI_SINT_VIDEO_MODE_FRAME_DONE);



	timing = &(dsi_ctrl->host_config.video_timing);

	v_total = timing->v_sync_width + timing->v_back_porch +

			timing->v_front_porch + timing->v_active;

	v_blank = timing->v_sync_width + timing->v_back_porch;

	fps = timing->refresh_rate;



	sleep_ms = CEIL((v_blank * 1000), (v_total * fps)) + 1;

	udelay(sleep_ms * 1000);

}



static int dsi_message_tx(struct dsi_ctrl *dsi_ctrl,

			  const struct mipi_dsi_msg *msg,

			  u32 flags)
@@ -971,6 +1005,7 @@ static int dsi_message_tx(struct dsi_ctrl *dsi_ctrl, 
	}



	if (!(flags & DSI_CTRL_CMD_DEFER_TRIGGER)) {

		dsi_ctrl_wait_for_video_done(dsi_ctrl);

		dsi_ctrl_enable_status_interrupt(dsi_ctrl,

					DSI_SINT_CMD_MODE_DMA_DONE, NULL);

		reinit_completion(&dsi_ctrl->irq_info.cmd_dma_done);