[PATCH V2 01/13] i3c: mipi-i3c-hci-pci: Set 64-bit DMA mask for Intel controllers

From: Adrian Hunter <adrian.hunter@intel.com>
To: alexandre.belloni@bootlin.com
Cc: Frank.Li@nxp.com, linux-i3c@lists.infradead.org
Subject: [PATCH V2 01/13] i3c: mipi-i3c-hci-pci: Set 64-bit DMA mask for Intel controllers
Date: Fri, 14 Nov 2025 20:13:44 +0200	[thread overview]
Message-ID: <20251114181356.66515-2-adrian.hunter@intel.com> (raw)
In-Reply-To: <20251114181356.66515-1-adrian.hunter@intel.com>

All Intel controllers support 64-bit DMA.  Set the DMA mask accordingly.

This is needed only if there is no IOMMU configured, which is not
recommended, but possible.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---


Changes in V2:

	No need to check error from dma_set_mask_and_coherent() with a
	64-bit mask

 drivers/i3c/master/mipi-i3c-hci/mipi-i3c-hci-pci.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/i3c/master/mipi-i3c-hci/mipi-i3c-hci-pci.c b/drivers/i3c/master/mipi-i3c-hci/mipi-i3c-hci-pci.c
index dd4484eff2f0..3cd15ca7d391 100644
--- a/drivers/i3c/master/mipi-i3c-hci/mipi-i3c-hci-pci.c
+++ b/drivers/i3c/master/mipi-i3c-hci/mipi-i3c-hci-pci.c
@@ -36,6 +36,8 @@ static int mipi_i3c_hci_pci_intel_init(struct pci_dev *pci)
 	if (!priv)
 		return -ENOMEM;
 
+	dma_set_mask_and_coherent(&pci->dev, DMA_BIT_MASK(64));
+
 	/* Assert reset, wait for completion and release reset */
 	writel(0, priv + INTEL_PRIV_RESETS);
 	timeout = jiffies + msecs_to_jiffies(10);
-- 
2.51.0


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