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Commit f4e37fb7 authored by Laurent Pinchart's avatar Laurent Pinchart Committed by Mauro Carvalho Chehab
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[media] v4l: vsp1: lut: Support runtime modification of controls



Allow reconfiguration of the look-up table at runtime.

Signed-off-by: default avatarLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent fc845e52
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+15 −10
Original line number Diff line number Diff line
@@ -52,7 +52,9 @@ static int lut_set_table(struct vsp1_lut *lut, struct v4l2_ctrl *ctrl)
		vsp1_dl_fragment_write(dlb, VI6_LUT_TABLE + 4 * i,
				       ctrl->p_new.p_u32[i]);

	spin_lock_irq(&lut->lock);
	swap(lut->lut, dlb);
	spin_unlock_irq(&lut->lock);

	vsp1_dl_fragment_free(dlb);
	return 0;
@@ -184,20 +186,21 @@ static void lut_configure(struct vsp1_entity *entity,
			  struct vsp1_dl_list *dl, bool full)
{
	struct vsp1_lut *lut = to_lut(&entity->subdev);
	struct vsp1_dl_body *dlb;
	unsigned long flags;

	if (!full)
		return;

	if (full) {
		vsp1_lut_write(lut, dl, VI6_LUT_CTRL, VI6_LUT_CTRL_EN);
		return;
	}

	mutex_lock(lut->ctrls.lock);

	if (lut->lut) {
		vsp1_dl_list_add_fragment(dl, lut->lut);
	spin_lock_irqsave(&lut->lock, flags);
	dlb = lut->lut;
	lut->lut = NULL;
	}
	spin_unlock_irqrestore(&lut->lock, flags);

	mutex_unlock(lut->ctrls.lock);
	if (dlb)
		vsp1_dl_list_add_fragment(dl, dlb);
}

static const struct vsp1_entity_operations lut_entity_ops = {
@@ -217,6 +220,8 @@ struct vsp1_lut *vsp1_lut_create(struct vsp1_device *vsp1)
	if (lut == NULL)
		return ERR_PTR(-ENOMEM);

	spin_lock_init(&lut->lock);

	lut->entity.ops = &lut_entity_ops;
	lut->entity.type = VSP1_ENTITY_LUT;

+3 −0
Original line number Diff line number Diff line
@@ -13,6 +13,8 @@
#ifndef __VSP1_LUT_H__
#define __VSP1_LUT_H__

#include <linux/spinlock.h>

#include <media/media-entity.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-subdev.h>
@@ -29,6 +31,7 @@ struct vsp1_lut {

	struct v4l2_ctrl_handler ctrls;

	spinlock_t lock;
	struct vsp1_dl_body *lut;
};