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Thu, 16 May 2024 13:14:05 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=denx.de; s=phobos-20191101; t=1715858046; bh=RTRToB4vUTm0ZyMBu/TqK7nD8AS7u9L11XcSxj+30Z4=; h=Date:From:Subject:To:Cc:References:In-Reply-To:From; b=rFEyfyldCo0w74IknHphCZVE2NuRS3PrH+/VXlTXDvnrPqYx6Zwcp/NRanIBt8vQY SHNz6SzYvaI84aOU35Ky8tUaqz0KoATol8Qe1yOBoYMhhStBP+lHyP2CQv1OrfNrJG HDFfVd0EgomErL/SUoJTSHxoAyAJd+LH8y4hNTvomsjYLsWortF9QMfDphaqFO1tXg kXLcA4d0tIgbcNFQ8aE1X5IdaneVOWAjh7Cvh2iarybZsdVmkpYCYtFCw2zawUrUn+ wxbgeCdiWOWkTTShL3BvVE6AnUQRtd5fkUDxDtfThuDkdL09jFRPgCBpOaJaKcKLgE 3Mdua4P3eSeJw== Message-ID: <76b3cee8-1fe3-4192-b8c9-7a9c2b7165f0@denx.de> Date: Thu, 16 May 2024 13:14:04 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird From: Marek Vasut Subject: Re: [PATCH] arm64: dts: imx8mp: Enable HDMI on i.MX8MP DHCOM PDK2 and PDK3 To: Francesco Dolcini Cc: linux-arm-kernel@lists.infradead.org, Conor Dooley , Fabio Estevam , Krzysztof Kozlowski , Pengutronix Kernel Team , Rob Herring , Sascha Hauer , Shawn Guo , devicetree@vger.kernel.org, imx@lists.linux.dev, kernel@dh-electronics.com, linux-kernel@vger.kernel.org References: <20240514010706.245874-1-marex@denx.de> <20240516080008.GA9338@francesco-nb> Content-Language: en-US In-Reply-To: <20240516080008.GA9338@francesco-nb> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: clamav-milter 0.103.8 at phobos.denx.de X-Virus-Status: Clean On 5/16/24 10:00 AM, Francesco Dolcini wrote: > Hello Marek, Hi, > On Tue, May 14, 2024 at 03:06:42AM +0200, Marek Vasut wrote: >> Enable HDMI output on i.MX8MP DHCOM PDK2 and PDK3. The I2C5 on PDK2 and >> I2C mux port 1 on PDK3 respectively are used in regular I2C mode instead >> of HDMI DDC mode to permit connection of other I2C devices on those buses. > > Are you able to read the HDMI EDID with such configuration? I have the > patch ready for verdin imx8mp, I just did not have time to figure out > this last details. Yes with ddc-i2c-bus in hdmi_tx{} node, no with ddc-i2c-bus in connector node. Maybe that's what you're running into ? The DW HDMI core needs the ddc-i2c-bus property in hdmi_tx{} node if you use non-native I2C bus for the DDC channel.