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[68.4.215.93]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-21c2cea2014sm62571685ad.41.2025.01.20.08.34.10 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 20 Jan 2025 08:34:13 -0800 (PST) Message-ID: <5221f64e-fda4-4daa-add7-1d0b26765113@broadcom.com> Date: Mon, 20 Jan 2025 08:34:14 -0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2] Revert v6.2-rc1 and later "ARM: dts: bcm2835-rpi: Use firmware clocks for display" To: "H. Nikolaus Schaller" , wahrenst@gmx.net Cc: Rob Herring , Krzysztof Kozlowski , Florian Fainelli , Ray Jui , Scott Branden , devicetree , Linux Kernel Mailing List , stable , Broadcom internal kernel review list , linux-rpi-kernel@lists.infradead.org, arm-soc , Discussions about the Letux Kernel References: <808a325f-81bc-4f5d-8c07-fa255ef2d25a@gmx.net> <8F33BB1D-2210-421B-A788-8484C23DF4C6@goldelico.com> Content-Language: en-US From: Florian Fainelli Autocrypt: addr=florian.fainelli@broadcom.com; keydata= xsBNBFPAG8ABCAC3EO02urEwipgbUNJ1r6oI2Vr/+uE389lSEShN2PmL3MVnzhViSAtrYxeT M0Txqn1tOWoIc4QUl6Ggqf5KP6FoRkCrgMMTnUAINsINYXK+3OLe7HjP10h2jDRX4Ajs4Ghs JrZOBru6rH0YrgAhr6O5gG7NE1jhly+EsOa2MpwOiXO4DE/YKZGuVe6Bh87WqmILs9KvnNrQ PcycQnYKTVpqE95d4M824M5cuRB6D1GrYovCsjA9uxo22kPdOoQRAu5gBBn3AdtALFyQj9DQ KQuc39/i/Kt6XLZ/RsBc6qLs+p+JnEuPJngTSfWvzGjpx0nkwCMi4yBb+xk7Hki4kEslABEB AAHNMEZsb3JpYW4gRmFpbmVsbGkgPGZsb3JpYW4uZmFpbmVsbGlAYnJvYWRjb20uY29tPsLB IQQQAQgAywUCZWl41AUJI+Jo+hcKAAG/SMv+fS3xUQWa0NryPuoRGjsA3SAUAAAAAAAWAAFr ZXktdXNhZ2UtbWFza0BwZ3AuY29tjDAUgAAAAAAgAAdwcmVmZXJyZWQtZW1haWwtZW5jb2Rp bmdAcGdwLmNvbXBncG1pbWUICwkIBwMCAQoFF4AAAAAZGGxkYXA6Ly9rZXlzLmJyb2FkY29t Lm5ldAUbAwAAAAMWAgEFHgEAAAAEFQgJChYhBNXZKpfnkVze1+R8aIExtcQpvGagAAoJEIEx tcQpvGagWPEH/2l0DNr9QkTwJUxOoP9wgHfmVhqc0ZlDsBFv91I3BbhGKI5UATbipKNqG13Z TsBrJHcrnCqnTRS+8n9/myOF0ng2A4YT0EJnayzHugXm+hrkO5O9UEPJ8a+0553VqyoFhHqA zjxj8fUu1px5cbb4R9G4UAySqyeLLeqnYLCKb4+GklGSBGsLMYvLmIDNYlkhMdnnzsSUAS61 WJYW6jjnzMwuKJ0ZHv7xZvSHyhIsFRiYiEs44kiYjbUUMcXor/uLEuTIazGrE3MahuGdjpT2 IOjoMiTsbMc0yfhHp6G/2E769oDXMVxCCbMVpA+LUtVIQEA+8Zr6mX0Yk4nDS7OiBlvOwE0E U8AbwQEIAKxr71oqe+0+MYCc7WafWEcpQHFUwvYLcdBoOnmJPxDwDRpvU5LhqSPvk/yJdh9k 4xUDQu3rm1qIW2I9Puk5n/Jz/lZsqGw8T13DKyu8eMcvaA/irm9lX9El27DPHy/0qsxmxVmU pu9y9S+BmaMb2CM9IuyxMWEl9ruWFS2jAWh/R8CrdnL6+zLk60R7XGzmSJqF09vYNlJ6Bdbs MWDXkYWWP5Ub1ZJGNJQ4qT7g8IN0qXxzLQsmz6tbgLMEHYBGx80bBF8AkdThd6SLhreCN7Uh IR/5NXGqotAZao2xlDpJLuOMQtoH9WVNuuxQQZHVd8if+yp6yRJ5DAmIUt5CCPcAEQEAAcLB gQQYAQIBKwUCU8AbwgUbDAAAAMBdIAQZAQgABgUCU8AbwQAKCRCTYAaomC8PVQ0VCACWk3n+ obFABEp5Rg6Qvspi9kWXcwCcfZV41OIYWhXMoc57ssjCand5noZi8bKg0bxw4qsg+9cNgZ3P N/DFWcNKcAT3Z2/4fTnJqdJS//YcEhlr8uGs+ZWFcqAPbteFCM4dGDRruo69IrHfyyQGx16s CcFlrN8vD066RKevFepb/ml7eYEdN5SRALyEdQMKeCSf3mectdoECEqdF/MWpfWIYQ1hEfdm C2Kztm+h3Nkt9ZQLqc3wsPJZmbD9T0c9Rphfypgw/SfTf2/CHoYVkKqwUIzI59itl5Lze+R5 wDByhWHx2Ud2R7SudmT9XK1e0x7W7a5z11Q6vrzuED5nQvkhAAoJEIExtcQpvGagugcIAJd5 EYe6KM6Y6RvI6TvHp+QgbU5dxvjqSiSvam0Ms3QrLidCtantcGT2Wz/2PlbZqkoJxMQc40rb fXa4xQSvJYj0GWpadrDJUvUu3LEsunDCxdWrmbmwGRKqZraV2oG7YEddmDqOe0Xm/NxeSobc MIlnaE6V0U8f5zNHB7Y46yJjjYT/Ds1TJo3pvwevDWPvv6rdBeV07D9s43frUS6xYd1uFxHC 7dZYWJjZmyUf5evr1W1gCgwLXG0PEi9n3qmz1lelQ8lSocmvxBKtMbX/OKhAfuP/iIwnTsww 95A2SaPiQZA51NywV8OFgsN0ITl2PlZ4Tp9hHERDe6nQCsNI/Us= In-Reply-To: <8F33BB1D-2210-421B-A788-8484C23DF4C6@goldelico.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250120_083415_334490_4866E246 X-CRM114-Status: GOOD ( 18.96 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 1/19/2025 7:04 AM, 'H. Nikolaus Schaller' via BCM-KERNEL-FEEDBACK-LIST,PDL wrote: > Hi Stefan, > >> Am 19.01.2025 um 01:36 schrieb Stefan Wahren : >> >> Hi, >> >> Am 18.01.25 um 17:27 schrieb H. Nikolaus Schaller: >>> This reverts commit 27ab05e1b7e5c5ec9b4f658e1b2464c0908298a6. >>> >>> I tried to upgrade a RasPi 3B+ with Waveshare 7inch HDMI LCD >>> from 6.1.y to 6.6.y but found that the display is broken with >>> this log message: >>> >>> [ 17.776315] vc4-drm soc:gpu: bound 3f400000.hvs (ops vc4_drm_unregister [vc4]) >>> [ 17.784034] platform 3f806000.vec: deferred probe pending >>> >>> Some tests revealed that while 6.1.y works, 6.2-rc1 is already broken but all >>> newer kernels as well. And a bisect did lead me to this patch. >> I successfully tested every Kernel release until Linux 6.13-rc with the >> Raspberry Pi 3B+, so i prefer to step back and analyze this issue further. > > Yes, I would be happy with any solution. > >> What kernel config do you use ? > > a private one which enables application specific drivers. > >> What is the value of CONFIG_CLK_RASPBERRYPI ? > > CONFIG_CLK_RASPBERRYPI is not set > > I checked where this is defined and it is in bcm2835_defconfig and > multi_v7_defconfig by > > 4c6f5d4038af2c ("ARM: defconfig: enable cpufreq driver for RPi") > > which hides this requirement quite well and got therefore unnoticed... > > Setting CONFIG_CLK_RASPBERRYPI=y makes HDMI work without my proposed revert. > Tested with v6.2.16, v6.6.72, v6.12.10 and v6.13-rc7. I have been burned before by something similar and came up with this patch series that I should resubmit after addressing Conor's comment: https://lore.kernel.org/all/20240513235234.1474619-1-florian.fainelli@broadcom.com/ Essentially, it removes the guess work, all you have to do is enable CONFIG_ARCH_BCM2835 and it just works, which is how it should be IMHO. -- Florian