From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail11.truemail.it (mail11.truemail.it [217.194.8.81]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 112A21BC091; Tue, 22 Oct 2024 17:11:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.194.8.81 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729617111; cv=none; b=KqOnWkdXumF5XL0UELcXveKcLQyV+W/2sntDqI9EJoxU+Mvl2mpuEdrRoh/2uVDDLoHifYflCq5gciKCMOxJjR+sOZgweIaTRVkmHYFkQiLIuW8cZyUbJj1Y16Bg+kdg7/a+9c40oSRBdiDKtmdU/9NqwPTHfnPMto9LRIsk1k4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729617111; c=relaxed/simple; bh=zgKF43dkTCb7+rHdwfykRvvAg016VrUQvbCDvWFrWZE=; h=Date:From:To:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=jScmcEJLPW/oHfyGM8c9QRQk56pNawDEUwaS1Mky9eriFDxI+21h61X8sGXjOC/T+Aqe1rkQO/Pa6C9f/y0X3ca4j+2Sl2OIuJpresstmH+o1SAxUDUr1+C+2xGtRmRNaX1+exFZBqCQBHbU9EXm+ohtcnc6Kr91/HokGB91a18= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=dolcini.it; spf=pass smtp.mailfrom=dolcini.it; dkim=pass (2048-bit key) header.d=dolcini.it header.i=@dolcini.it header.b=JvzJn82G; arc=none smtp.client-ip=217.194.8.81 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=dolcini.it Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=dolcini.it Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=dolcini.it header.i=@dolcini.it header.b="JvzJn82G" Received: from francesco-nb (93-49-2-63.ip317.fastwebnet.it [93.49.2.63]) by mail11.truemail.it (Postfix) with ESMTPA id D714A1F9B6; Tue, 22 Oct 2024 19:11:43 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=dolcini.it; s=default; t=1729617104; bh=k1oO2yPovWzkvp/CtKxWHByIK1XlmGAmvnAAyw45gFo=; h=From:To:Subject; b=JvzJn82G7aY9bSOxYKRQu46aeAEQFWvg1/W+CAuYCsIDUq6FCTmQGNjJUnjlURmi4 I8X+BP60cIKUvi5+GEWPXAZvScxt1tw3hu0JSCttXcl84/SvVauItyOX5ssNOz1LcG 3FGXNRx+30tk0m5IopqJFY326bJgEepfCR4yIc+5u7rZouYKW7h7NEVHCp3aiIk21E onIWMn94nuywKQiW45X8kg0q+YS7e7XQurHMkZFb4/CejoY5wy4rZ2EKldVCjGZEp4 MgZiS5jUp2gMF6WwJc+lmGEfKRLqND5RqRrENDorF1pluPZzEmooFwK0wipjksgbzj 8h2EucngP2HNg== Date: Tue, 22 Oct 2024 19:11:39 +0200 From: Francesco Dolcini To: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Francesco Dolcini , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: Re: [PATCH v1] drm/bridge: tc358768: Fix DSI command tx Message-ID: <20241022171139.GA71850@francesco-nb> References: <20240926141246.48282-1-francesco@dolcini.it> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240926141246.48282-1-francesco@dolcini.it> Hello, On Thu, Sep 26, 2024 at 04:12:46PM +0200, Francesco Dolcini wrote: > From: Francesco Dolcini > > Wait for the command transmission to be completed in the DSI transfer > function polling for the dc_start bit to go back to idle state after the > transmission is started. > > This is documented in the datasheet and failures to do so lead to > commands corruption. > > Fixes: ff1ca6397b1d ("drm/bridge: Add tc358768 driver") > Cc: stable@vger.kernel.org > Signed-off-by: Francesco Dolcini Just a gently ping on this, Francesco