linux-kernel - [PATCH V2 2/4] Revert "media: platform: ti: Remove unused vpdma_update_dma

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Message-ID: <20250716111912.235157-3-y-abhilashchandra@ti.com>
Date: Wed, 16 Jul 2025 16:49:10 +0530
From: Yemike Abhilash Chandra <y-abhilashchandra@...com>
To: <mchehab@...nel.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
        <conor+dt@...nel.org>
CC: <linux@...linux.org.uk>, <ardb@...nel.org>, <ebiggers@...nel.org>,
        <geert+renesas@...der.be>, <claudiu.beznea@...on.dev>,
        <bparrot@...com>, <andre.draszik@...aro.org>,
        <kuninori.morimoto.gx@...esas.com>,
        <prabhakar.mahadev-lad.rj@...renesas.com>,
        <heikki.krogerus@...ux.intel.com>, <kory.maincent@...tlin.com>,
        <florian.fainelli@...adcom.com>, <lumag@...nel.org>,
        <dale@...nsworth.org>, <sbellary@...libre.com>,
        <linux-media@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
        <dagriego@...lakesoftware.com>, <u-kumar1@...com>,
        <y-abhilashchandra@...com>
Subject: [PATCH V2 2/4] Revert "media: platform: ti: Remove unused vpdma_update_dma_addr"

This reverts commit 9314891df119442a6ec1518b3d872c330e2bf1a1.

We're adding support for TI VIP driver, so this is no longer unused.

Signed-off-by: Yemike Abhilash Chandra <y-abhilashchandra@...com>
---
 drivers/media/platform/ti/vpe/vpdma.c | 32 +++++++++++++++++++++++++++
 drivers/media/platform/ti/vpe/vpdma.h |  3 +++
 2 files changed, 35 insertions(+)

diff --git a/drivers/media/platform/ti/vpe/vpdma.c b/drivers/media/platform/ti/vpe/vpdma.c
index bb8a8bd7980c..da90d7f03f82 100644
--- a/drivers/media/platform/ti/vpe/vpdma.c
+++ b/drivers/media/platform/ti/vpe/vpdma.c
@@ -552,6 +552,38 @@ EXPORT_SYMBOL(vpdma_submit_descs);
 
 static void dump_dtd(struct vpdma_dtd *dtd);
 
+void vpdma_update_dma_addr(struct vpdma_data *vpdma,
+	struct vpdma_desc_list *list, dma_addr_t dma_addr,
+	void *write_dtd, int drop, int idx)
+{
+	struct vpdma_dtd *dtd = list->buf.addr;
+	dma_addr_t write_desc_addr;
+	int offset;
+
+	dtd += idx;
+	vpdma_unmap_desc_buf(vpdma, &list->buf);
+
+	dtd->start_addr = dma_addr;
+
+	/* Calculate write address from the offset of write_dtd from start
+	 * of the list->buf
+	 */
+	offset = (void *)write_dtd - list->buf.addr;
+	write_desc_addr = list->buf.dma_addr + offset;
+
+	if (drop)
+		dtd->desc_write_addr = dtd_desc_write_addr(write_desc_addr,
+							   1, 1, 0);
+	else
+		dtd->desc_write_addr = dtd_desc_write_addr(write_desc_addr,
+							   1, 0, 0);
+
+	vpdma_map_desc_buf(vpdma, &list->buf);
+
+	dump_dtd(dtd);
+}
+EXPORT_SYMBOL(vpdma_update_dma_addr);
+
 void vpdma_set_max_size(struct vpdma_data *vpdma, int reg_addr,
 			u32 width, u32 height)
 {
diff --git a/drivers/media/platform/ti/vpe/vpdma.h b/drivers/media/platform/ti/vpe/vpdma.h
index e4d7941c6207..393fcbb3cb40 100644
--- a/drivers/media/platform/ti/vpe/vpdma.h
+++ b/drivers/media/platform/ti/vpe/vpdma.h
@@ -222,6 +222,9 @@ void vpdma_free_desc_list(struct vpdma_desc_list *list);
 int vpdma_submit_descs(struct vpdma_data *vpdma, struct vpdma_desc_list *list,
 		       int list_num);
 bool vpdma_list_busy(struct vpdma_data *vpdma, int list_num);
+void vpdma_update_dma_addr(struct vpdma_data *vpdma,
+	struct vpdma_desc_list *list, dma_addr_t dma_addr,
+	void *write_dtd, int drop, int idx);
 
 /* VPDMA hardware list funcs */
 int vpdma_hwlist_alloc(struct vpdma_data *vpdma, void *priv);
-- 
2.34.1