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[109.252.193.159]) by smtp.googlemail.com with ESMTPSA id j22sm2028419lfr.6.2020.11.15.06.10.05 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 15 Nov 2020 06:10:05 -0800 (PST) Subject: Re: [PATCH v1] clk: tegra30: Use 300MHz for video decoder by default To: Stephen Boyd , Jonathan Hunter , Michael Turquette , Peter De Schrijver , Prashant Gaikwad , Thierry Reding Cc: linux-tegra@vger.kernel.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org References: <20201104134810.21026-1-digetx@gmail.com> <160538861846.60232.2236874455363048014@swboyd.mtv.corp.google.com> From: Dmitry Osipenko Message-ID: Date: Sun, 15 Nov 2020 17:10:04 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.4.2 MIME-Version: 1.0 In-Reply-To: <160538861846.60232.2236874455363048014@swboyd.mtv.corp.google.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 15.11.2020 00:16, Stephen Boyd пишет: > Quoting Dmitry Osipenko (2020-11-04 05:48:10) >> The 600MHz is a too high clock rate for some SoC versions for the video >> decoder hardware and this may cause stability issues. Use 300MHz for the >> video decoder by default, which is supported by all hardware versions. >> >> Fixes: ed1a2459e20c ("clk: tegra: Add Tegra20/30 EMC clock implementation") >> Signed-off-by: Dmitry Osipenko >> --- > > Should this go to clk-fixes? Thierry? > Either way should be good. The fix isn't critical because 600MHz seems to be working okay on unsupported hardware. Potentially this could vary depending on a board, but then I don't think that there are actively-supported boards which would notice this change. Likely that this patch will be backported by a bot anyways because of the fixes tag.