linux-kernel - [PATCH RFC 1/6] dt-bindings: dma: qcom,gpi: Retire passing the protocol ID

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20250730-topic-dma_genise_cookie-v1-1-b505c1238f9f@oss.qualcomm.com>
Date: Wed, 30 Jul 2025 11:33:28 +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>, 
 Neal Gompa <neal@...pa.dev>, 
 Ludovic Desroches <ludovic.desroches@...rochip.com>, 
 Florian Fainelli <florian.fainelli@...adcom.com>, 
 Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>, 
 Ray Jui <rjui@...adcom.com>, Scott Branden <sbranden@...adcom.com>, 
 Paul Cercueil <paul@...pouillou.net>, 
 Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>, 
 Viresh Kumar <vireshk@...nel.org>, 
 Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, 
 Frank Li <Frank.Li@....com>, Shawn Guo <shawnguo@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>, 
 Taichi Sugaya <sugaya.taichi@...ionext.com>, 
 Takao Orito <orito.takao@...ionext.com>, 
 Andreas Färber <afaerber@...e.de>, 
 Manivannan Sadhasivam <mani@...nel.org>, Daniel Mack <daniel@...que.org>, 
 Haojian Zhuang <haojian.zhuang@...il.com>, 
 Robert Jarzmik <robert.jarzmik@...e.fr>, 
 Geert Uytterhoeven <geert+renesas@...der.be>, 
 Magnus Damm <magnus.damm@...il.com>, 
 Patrice Chotard <patrice.chotard@...s.st.com>, 
 Linus Walleij <linus.walleij@...aro.org>, 
 Amélie Delaunay <amelie.delaunay@...s.st.com>, 
 Maxime Coquelin <mcoquelin.stm32@...il.com>, 
 Alexandre Torgue <alexandre.torgue@...s.st.com>, 
 Chen-Yu Tsai <wens@...e.org>, Jernej Skrabec <jernej.skrabec@...il.com>, 
 Samuel Holland <samuel@...lland.org>, 
 Laxman Dewangan <ldewangan@...dia.com>, Jon Hunter <jonathanh@...dia.com>, 
 Thierry Reding <thierry.reding@...il.com>, 
 Peter Ujfalusi <peter.ujfalusi@...il.com>, 
 Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>, 
 Masami Hiramatsu <mhiramat@...nel.org>, Michal Simek <michal.simek@....com>, 
 Laurent Pinchart <laurent.pinchart@...asonboard.com>, 
 Rob Herring <robh@...nel.org>, Saravana Kannan <saravanak@...gle.com>, 
 Martin Povišer <povik+lin@...ebit.org>, 
 Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, 
 Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>, 
 Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>, 
 Mukesh Kumar Savaliya <quic_msavaliy@...cinc.com>, 
 Viken Dadhaniya <quic_vdadhani@...cinc.com>, 
 Andi Shyti <andi.shyti@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konradybcio@...nel.org>
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, 
 linux-rpi-kernel@...ts.infradead.org, linux-mips@...r.kernel.org, 
 imx@...ts.linux.dev, linux-actions@...ts.infradead.org, 
 linux-arm-msm@...r.kernel.org, linux-renesas-soc@...r.kernel.org, 
 linux-stm32@...md-mailman.stormreply.com, linux-sunxi@...ts.linux.dev, 
 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 1/6] dt-bindings: dma: qcom,gpi: Retire passing the
 protocol ID

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

This is a software construct that has no business being expressed in
dt-bindings. Drivers can be constructed to retrieve the protocol ID at
runtime or hardcode them per protocol.

Remove it, as a pre-requisite for further simplifying the GENI
bindings.

Signed-off-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
---
 Documentation/devicetree/bindings/dma/qcom,gpi.yaml | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/dma/qcom,gpi.yaml b/Documentation/devicetree/bindings/dma/qcom,gpi.yaml
index bbe4da2a11054f0d272017ddf5d5f7e47cf7a443..745613b93b210afd38946030f7477e91e08c907a 100644
--- a/Documentation/devicetree/bindings/dma/qcom,gpi.yaml
+++ b/Documentation/devicetree/bindings/dma/qcom,gpi.yaml
@@ -61,14 +61,13 @@ properties:
     maxItems: 13
 
   "#dma-cells":
-    const: 3
+    const: 2
     description: >
       DMA clients must use the format described in dma.txt, giving a phandle
       to the DMA controller plus the following 3 integer cells:
       - channel: if set to 0xffffffff, any available channel will be allocated
         for the client. Otherwise, the exact channel specified will be used.
       - seid: serial id of the client as defined in the SoC documentation.
-      - client: type of the client as defined in dt-bindings/dma/qcom-gpi.h
 
   iommus:
     maxItems: 1
@@ -98,7 +97,7 @@ examples:
     #include <dt-bindings/dma/qcom-gpi.h>
     gpi_dma0: dma-controller@...000 {
         compatible = "qcom,sdm845-gpi-dma";
-        #dma-cells = <3>;
+        #dma-cells = <2>;
         reg = <0x00800000 0x60000>;
         iommus = <&apps_smmu 0x0016 0x0>;
         dma-channels = <13>;

-- 
2.50.1