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([82.78.167.248]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-488a91686f9sm285777675e9.10.2026.04.07.06.35.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Apr 2026 06:35:32 -0700 (PDT) From: Claudiu X-Google-Original-From: Claudiu To: vkoul@kernel.org, Frank.Li@kernel.org, lgirdwood@gmail.com, broonie@kernel.org, perex@perex.cz, tiwai@suse.com, biju.das.jz@bp.renesas.com, prabhakar.mahadev-lad.rj@bp.renesas.com, p.zabel@pengutronix.de, geert+renesas@glider.be, fabrizio.castro.jz@renesas.com Cc: claudiu.beznea@tuxon.dev, dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, linux-sound@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Claudiu Beznea Subject: [PATCH v3 04/15] dmaengine: sh: rz-dmac: Add helper to compute the lmdesc address Date: Tue, 7 Apr 2026 16:34:56 +0300 Message-ID: <20260407133507.887404-5-claudiu.beznea.uj@bp.renesas.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260407133507.887404-1-claudiu.beznea.uj@bp.renesas.com> References: <20260407133507.887404-1-claudiu.beznea.uj@bp.renesas.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Claudiu Beznea Add a helper function to compute the lmdesc address. This makes the code easier to understand, and the helper will be used in subsequent patches. Signed-off-by: Claudiu Beznea --- Changes in v3: - none, this patch is new drivers/dma/sh/rz-dmac.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/dma/sh/rz-dmac.c b/drivers/dma/sh/rz-dmac.c index 34c00f3ffd4c..ef775ffa1099 100644 --- a/drivers/dma/sh/rz-dmac.c +++ b/drivers/dma/sh/rz-dmac.c @@ -272,6 +272,12 @@ static void rz_dmac_lmdesc_recycle(struct rz_dmac_chan= *channel) channel->lmdesc.head =3D lmdesc; } =20 +static u32 rz_dmac_lmdesc_addr(struct rz_dmac_chan *channel, struct rz_lmd= esc *lmdesc) +{ + return channel->lmdesc.base_dma + + (sizeof(struct rz_lmdesc) * (lmdesc - channel->lmdesc.base)); +} + static void rz_dmac_enable_hw(struct rz_dmac_chan *channel) { struct dma_chan *chan =3D &channel->vc.chan; @@ -284,9 +290,7 @@ static void rz_dmac_enable_hw(struct rz_dmac_chan *chan= nel) =20 rz_dmac_lmdesc_recycle(channel); =20 - nxla =3D channel->lmdesc.base_dma + - (sizeof(struct rz_lmdesc) * (channel->lmdesc.head - - channel->lmdesc.base)); + nxla =3D rz_dmac_lmdesc_addr(channel, channel->lmdesc.head); =20 chstat =3D rz_dmac_ch_readl(channel, CHSTAT, 1); if (!(chstat & CHSTAT_EN)) { --=20 2.43.0