From nobody Tue Feb 10 16:44:14 2026 Received: from mail-wm1-f47.google.com (mail-wm1-f47.google.com [209.85.128.47]) (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 E72822C033E for ; Tue, 10 Jun 2025 14:06:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.47 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749564385; cv=none; b=iCF18EmsccNolouwkFWXVRfbxd66S3FXdEZGAi8bv83a6Z3C/8ESAJzBvhitaAxkgxE8LZnfdtUbVPwssrPLMaaj42kAyNTx6MGPrKBKVveHyxy4UyHaDqDXBZ0r+F39HQTUSF68f3/e/wrlDmFVdCulO5JR0b1hoTDgxXs8hxY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749564385; c=relaxed/simple; bh=hOZPlM1KyWeQGK+fAet9Nxs5Wt17jNDUM1Ff6e36WS0=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=GwiTXSR3rikxBMP3l4jBpyR1y8TwzTX+F0IkqtuW3vLOzFZUjci+GzOi77HCIrRsMiowYZZH5maZvH61oxwUFtVDOWhmLIi3XS5OYVNcBU+Pfql9P99Ze4lNTFjTVFe8GHNckaUNkh6qPTfYSS29LEMdbD6bf+ZdjWbnOU7TnuA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=M2KtoO9t; arc=none smtp.client-ip=209.85.128.47 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="M2KtoO9t" Received: by mail-wm1-f47.google.com with SMTP id 5b1f17b1804b1-45306976410so630725e9.3 for ; Tue, 10 Jun 2025 07:06:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1749564382; x=1750169182; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=c08nNQiRjpMuZiP/f1jVDn68latr5bwhdLQgcHIbV2Q=; b=M2KtoO9t0tnmiOKPKbKIwiL/wOTAYzLD7/5ictVkbGj6PVVqXgD0bkb3QQPBbtGj5a fkzN/UWJJjE+C5/MDdrBkWSaRJw094HFiayM/Sy9M5Q5l3PQqnyjMx/AYBlqig3TVThG 2X+Am8JaOYtpxW/gG3TsgemAaVI/n/raMgQv7YdQoLKdT0S1NelesWZOBe9dcVt9LFSh Vg4m4qNnTfGpI6uZuJrA1W6pCmVcZj7/Gt++uvdXBtZrSnjpsbc0GgZvbFOxqmL/GWAB qbHnw1BaIsCoHHWkafHeVlPEZtQH8gSG+QVWgnD/isp9ZKxbmJExEca2xGsIemAT3n69 GcSA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1749564382; x=1750169182; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=c08nNQiRjpMuZiP/f1jVDn68latr5bwhdLQgcHIbV2Q=; b=n71gm1vJAenGkFdiiguNQBAnFQJvKfxksha6cS8Qp4wB3OORWn9ytEPTErPIdMRnDq T60wf4sSnEYsr93IA4qWuLoYnVndEWEewfX0X9nPRfbRMGjX4dEpy5qzX230jUmEuuqr wONVWLDlDSmPVjXeQdb1AwPD17AoQKdo1c1gN7InGs43DIjGWGAz7oWeWcg2hwSQCkiP GlY2T/nSH+0P07UDSzS8tOId0NTdQeKYolk7pvIxngzzQ4Zm/AxaaigvFABHtk01SVKr JmYZrsttegRtvJWcB47kOjjoYLnMahqvj6Iu3438BADnGEs2D9aP0Tq310cCnxFKO5+X eoJA== X-Forwarded-Encrypted: i=1; AJvYcCVHEc/Y5dEW6SeM5YcdzAIx4tSotVRsBQhgBYPOAC1VskGQSQ1EOcrFSBgkhNIKvaQWxITyXHAyG6KWel8=@vger.kernel.org X-Gm-Message-State: AOJu0YyY3UwYSyzNoUKADR+GNig9TZZavrXqAcg6MJXwxdSEj5LCCZ9E uOh8bpOyiEQfuUQw5Hyw7I4fk4BACrxsHFzv5kR8nR983omzb4jVvl9byvz2MwDfmLM= X-Gm-Gg: ASbGncu0lyw6W4VU98AtaDISWHfLn7zzzcJ0KUibi6ePB3UFuJf5t+piMmuYi1VK5i+ gMg9VwEo5tBNyk9ejPJMttI5Y3efe8fMOFAaUrZ/IN3DBib3tbT3qQZ8XDa7Tr+hIEu7h4/1PFs NWtfioy3tJ+DnF4049LQuOgDrH+xeUEmFOZVbSOLGBE0uL+cvnZVGU0q7Wd9Jr5ooQSmjGBkdWN nW2CURNWoBX76aRitN4fomcTrBxP1ff/ERe7si90jNZNVdFnLYxfqP5JFlhynvb4I9jAmtYJ0+2 nrCq8hKWe0Y/uJ1AtjGrlVfPRxdi2dgfjGBbcc0C4Pm3wdiMoWp49QSCicmM+RgbWtrNYrb5Yxu B97VEzg== X-Google-Smtp-Source: AGHT+IHDxukPheSrxBOvxKpZYaa8h9T+95Gg5jKYThUcUHQbgCqlc/EbIO/Sp6kjBnRf7HNWZ6eJEQ== X-Received: by 2002:a05:600c:c04b:20b0:441:c5ee:cdb4 with SMTP id 5b1f17b1804b1-452a470122cmr33063215e9.4.1749564381956; Tue, 10 Jun 2025 07:06:21 -0700 (PDT) Received: from [192.168.1.29] ([178.197.223.125]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3a53244df06sm12734469f8f.69.2025.06.10.07.06.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 10 Jun 2025 07:06:21 -0700 (PDT) From: Krzysztof Kozlowski Date: Tue, 10 Jun 2025 16:05:44 +0200 Subject: [PATCH v6 06/17] drm/msm/dsi/phy: Toggle back buffer resync after preparing PLL Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250610-b4-sm8750-display-v6-6-ee633e3ddbff@linaro.org> References: <20250610-b4-sm8750-display-v6-0-ee633e3ddbff@linaro.org> In-Reply-To: <20250610-b4-sm8750-display-v6-0-ee633e3ddbff@linaro.org> To: Abhinav Kumar , Sean Paul , Marijn Suijten , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Krishna Manikandan , Jonathan Marek , Kuogee Hsieh , Neil Armstrong , Dmitry Baryshkov , Bjorn Andersson , Michael Turquette , Stephen Boyd , Rob Clark Cc: linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Krzysztof Kozlowski , linux-clk@vger.kernel.org, Abel Vesa , Srinivas Kandagatla , Rob Clark , Dmitry Baryshkov X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1275; i=krzysztof.kozlowski@linaro.org; h=from:subject:message-id; bh=hOZPlM1KyWeQGK+fAet9Nxs5Wt17jNDUM1Ff6e36WS0=; b=owEBbQKS/ZANAwAKAcE3ZuaGi4PXAcsmYgBoSDvEFaGVfcvc7I+WsKnLa00SN5QPTkSzfiWGJ PahrGboSN2JAjMEAAEKAB0WIQTd0mIoPREbIztuuKjBN2bmhouD1wUCaEg7xAAKCRDBN2bmhouD 1/FCD/996DPQkeSTgHdKYXZwdFyt3uizbqcoRQhLkEEg860tSjn7Kte3DUkvlR7EWtxQc1vwNij h6zflWghpo2l50dYyFTsw/N7CR6NRHryv3B7+nv+2r33l7WcaoFYkGM4FsAkCJKMPl6bGpRNQvA 9jYFY0BIHeuFg8AXYSEvLhDdZ8R+Zdx37F7ax1PugZeMApDCjDLkq9ba2ok7D7AoApGrHVyuZce kRFTFCEytra1l3KwEc4Mn+XdmielljNWWsKSC6JX9ReyWvrwewEpGU7twwfCxB7LwVqmnbhzP/Y OpmQ2JKetVRFnfrvaNuaTttsyTjub1lLnKUP5t23B8qKg2BrTwdsdVbvD8j6L0ykRwn9BMAaOAu z9dNv2P7/vnLpPNE1JmD8TbtHsmK15kV34zypREhkFVycSF8QAeMOA1Mr2SY5MXginxjTNRkS3H DHBBUWus08o+ao5tXURP0ryJuFyaWOJ+omsvAmjClWK2RIWoZLvhOAoPHumWwrZ7c/FLW3Fm3XN 7CIJpoOxTfq/cRbfsadOyaALh7+jFh5l6qhA5aFXQionaHY2c+4Nxh680d/6/sTx/hEyXCmoXD6 wl5tCEHIljBGjnYYUs2fMNCaFMtpUQeNbctmXaAWguGng2Fehbc2OAm4mwDti2rpffedGvjZJix lW03btC9avV5Gvg== X-Developer-Key: i=krzysztof.kozlowski@linaro.org; a=openpgp; fpr=9BD07E0E0C51F8D59677B7541B93437D3B41629B According to Hardware Programming Guide for DSI PHY, the retime buffer resync should be done after PLL clock users (byte_clk and intf_byte_clk) are enabled. Downstream also does it as part of configuring the PLL. Driver was only turning off the resync FIFO buffer, but never bringing it on again. Reviewed-by: Dmitry Baryshkov Signed-off-by: Krzysztof Kozlowski --- Changes in v6: 1. Fix typo in commit msg Changes in v5: 1. New patch --- drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c b/drivers/gpu/drm/ms= m/dsi/phy/dsi_phy_7nm.c index c19890358b7479c85c793aa7470904127c2d0206..f0ff6c9fbc2e6d28c96c08114c0= f417708d70b10 100644 --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c @@ -467,6 +467,10 @@ static int dsi_pll_7nm_vco_prepare(struct clk_hw *hw) if (pll_7nm->slave) dsi_pll_enable_global_clk(pll_7nm->slave); =20 + writel(0x1, pll_7nm->phy->base + REG_DSI_7nm_PHY_CMN_RBUF_CTRL); + if (pll_7nm->slave) + writel(0x1, pll_7nm->slave->phy->base + REG_DSI_7nm_PHY_CMN_RBUF_CTRL); + error: return rc; } --=20 2.45.2