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Commit b03f0141 authored by Adrian Salido-Moreno's avatar Adrian Salido-Moreno Committed by Gerrit - the friendly Code Review server
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msm: mdp3: implement overlay prepare ioctl for mdp3 driver 



Implement overlay prepare ioctl call for mdp3 display driver. This will
allow a full frame with multiple overlays to be configured at once and
perform frame level checks before being pushed to display. This function
guarantees that if the call is successful, the frame can be displayed
successfully on the screen when display commit is called.

Change-Id: I761f48f81512fbe538565c4622d9299857350da1
Signed-off-by: default avatarAdrian Salido-Moreno <adrianm@codeaurora.org>
parent d4fa573d

drivers/video/msm/mdss/mdp3_ctrl.c

+40 −0
Original line number Diff line number Diff line
@@ -1628,6 +1628,43 @@ static int mdp3_ctrl_lut_update(struct msm_fb_data_type *mfd, 
	return rc;

}



static int mdp3_overlay_prepare(struct msm_fb_data_type *mfd,

		struct mdp_overlay_list __user *user_ovlist)

{

	struct mdp_overlay_list ovlist;

	struct mdp3_session_data *mdp3_session = mfd->mdp.private1;

	struct mdp_overlay *req;

	int rc;



	if (!mdp3_session)

		return -ENODEV;



	req = &mdp3_session->req_overlay;



	if (copy_from_user(&ovlist, user_ovlist, sizeof(ovlist)))

		return -EFAULT;



	if (ovlist.num_overlays != 1) {

		pr_err("OV_PREPARE failed: only 1 overlay allowed\n");

		return -EINVAL;

	}



	if (copy_from_user(req, ovlist.overlay_list[0], sizeof(*req)))

		return -EFAULT;



	rc = mdp3_overlay_set(mfd, req);

	if (!IS_ERR_VALUE(rc)) {

		if (copy_to_user(ovlist.overlay_list[0], req, sizeof(*req)))

			return -EFAULT;

	}



	if (put_user(IS_ERR_VALUE(rc) ? 0 : 1,

			&user_ovlist->processed_overlays))

		return -EFAULT;



	return rc;

}



static int mdp3_ctrl_ioctl_handler(struct msm_fb_data_type *mfd,

					u32 cmd, void __user *argp)

{
@@ -1727,6 +1764,9 @@ static int mdp3_ctrl_ioctl_handler(struct msm_fb_data_type *mfd, 
		if (rc)

			pr_err("OVERLAY_PLAY failed (%d)\n", rc);

		break;

	case MSMFB_OVERLAY_PREPARE:

		rc = mdp3_overlay_prepare(mfd, argp);

		break;

	default:

		break;

	}