linux-kernel - Re: [PATCH v8 1/3] media: qcom: camss: Add common TPG support

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] [day] [month] [year] [list]

Message-ID: <e94e3391-6fef-4378-b5bd-66aafea95a0c@linaro.org>
Date: Thu, 15 Jan 2026 15:54:15 +0000
From: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
To: Vladimir Zapolskiy <vladimir.zapolskiy@...aro.org>,
 Wenmeng Liu <wenmeng.liu@....qualcomm.com>, Robert Foss <rfoss@...nel.org>,
 Todor Tomov <todor.too@...il.com>, Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
 linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH v8 1/3] media: qcom: camss: Add common TPG support

On 15/01/2026 02:58, Vladimir Zapolskiy wrote:
>>> Writing proper values to registers should be a concern on the driver 
>>> level,
>>> it sounds improper to push this simple task and responsibility to
>>> userspace.
>>
>> I think we should stick to the same format as is already upstream for
>> the CSID version of this - which is the same data.
>>
> 
> It is not the same and it will not be the same, if the currently presented
> version is taken. If TPG modes in CSID are continuous, here they are not,
> so it makes a big difference for userspace, and better it should be 
> removed.

Not sure I follow you here.

The set of strings for camss-csid we have now is:

const char * const csid_testgen_modes[] = {
         "Disabled",
         "Incrementing",
         "Alternating 0x55/0xAA",
         "All Zeros 0x00",
         "All Ones 0xFF",
         "Pseudo-random Data",
         "User Specified",
         "Complex pattern",
         "Color box",
         "Color bars",
         NULL
};

Wengmeng has

+const char * const testgen_payload_modes[] = {
+	"Disabled",
+	"Incrementing",
+	"Alternating 0x55/0xAA",
+	"Reserved",
+	"Reserved",
+	"Pseudo-random Data",
+	"User Specified",
+	"Reserved",
+	"Reserved",
+	"Color bars",
+	"Reserved"
+};

I think the "Reserved" should go away but, other than that we should 
keep namespace consistency between CSID-TPG and standalone-TPG.

---
bod