linux-kernel - [PATCH RFC 4/6] i2c: qcom-geni: Hint GENI protocol ID to GPI DMA

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Message-Id: <20250730-topic-dma_genise_cookie-v1-4-b505c1238f9f@oss.qualcomm.com>
Date: Wed, 30 Jul 2025 11:33:31 +0200
From: Konrad Dybcio <konradybcio@...nel.org>
To: Vinod Koul <vkoul@...nel.org>, Sven Peter <sven@...nel.org>, 
 Janne Grunau <j@...nau.net>, Alyssa Rosenzweig <alyssa@...enzweig.io>, 
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Cc: Marijn Suijten <marijn.suijten@...ainline.org>, 
 dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org, 
 asahi@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, 
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 linux-tegra@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-sound@...r.kernel.org, linux-i2c@...r.kernel.org, 
 linux-spi@...r.kernel.org, Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Subject: [PATCH RFC 4/6] i2c: qcom-geni: Hint GENI protocol ID to GPI DMA

From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>

With the API in place, request the correct protocol ID with the GPI DMA
to avoid having to hardcode this obvious information in the device
tree.

Signed-off-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
---
 drivers/i2c/busses/i2c-qcom-geni.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c
index ff2289b52c84ccf9ef786c2618bd869453c5f611..4c702ee728d6cc9282688bc278bd401f3de3266a 100644
--- a/drivers/i2c/busses/i2c-qcom-geni.c
+++ b/drivers/i2c/busses/i2c-qcom-geni.c
@@ -754,14 +754,14 @@ static int setup_gpi_dma(struct geni_i2c_dev *gi2c)
 	int ret;
 
 	geni_se_select_mode(&gi2c->se, GENI_GPI_DMA);
-	gi2c->tx_c = dma_request_chan(gi2c->se.dev, "tx");
+	gi2c->tx_c = dma_request_chan_w_data(gi2c->se.dev, "tx", (void *)GENI_SE_I2C);
 	if (IS_ERR(gi2c->tx_c)) {
 		ret = dev_err_probe(gi2c->se.dev, PTR_ERR(gi2c->tx_c),
 				    "Failed to get tx DMA ch\n");
 		goto err_tx;
 	}
 
-	gi2c->rx_c = dma_request_chan(gi2c->se.dev, "rx");
+	gi2c->rx_c = dma_request_chan_w_data(gi2c->se.dev, "rx", (void *)GENI_SE_I2C);
 	if (IS_ERR(gi2c->rx_c)) {
 		ret = dev_err_probe(gi2c->se.dev, PTR_ERR(gi2c->rx_c),
 				    "Failed to get rx DMA ch\n");

-- 
2.50.1