From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 30867280CFC; Wed, 25 Feb 2026 01:45:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771983951; cv=none; b=poxTDOSkO2fnQUVsDxqQRz2dy5aPxcWQAIoVBxdTBkKmsy2PFhraRVfpfW7fy5fTR7wYCv8x6o416zwVx+n2T8P9lSiTGCCkJ9D6jMBETibDBn3OHcnW8P8tJu7OPIAikLh3uUlq3Y3OZcQ9bVxQMh5tEOK7Yz7/ddQ0wySZfKI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771983951; c=relaxed/simple; bh=kffXL4XAyMKK5ofJ9wQTe91EPvgGAbiaowP1Wr0VL1Y=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=DBTwHx4kisQH3wb221Z1/aKB34ScV9xgrZlsQkqVmowNzaStUMjjRFbfDa5KLMtXaGbKPzBKD7HtF/d95wuZlDQebZMZS5UHhBA/qq7BDwS3ifk9S3d7bfrKqLdAVUZIUTGmqLQKkCgvkeBVRCLdmHvZw8IADcsFsXHPgWCMkYc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=z5SKUsbs; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="z5SKUsbs" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E63C7C116D0; Wed, 25 Feb 2026 01:45:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1771983951; bh=kffXL4XAyMKK5ofJ9wQTe91EPvgGAbiaowP1Wr0VL1Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=z5SKUsbssRGuXI9ZiIi9+XxF+i3MpBB4jz/WCf4MZ89x4ET3sCoqWuerDWVheqXcJ lXpzX0C66nVyUVmrAXDOB+idmfhiPQF5+deejn/17ZqVcY3FPjXzN4I9zUwugWJ7Sq RCOV0KpfYvsq3xWlcUmwdI4+jy5qn2kKG8OZF7lI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Konrad Dybcio , Dmitry Baryshkov , Sasha Levin , Val Packett Subject: [PATCH 6.18 210/641] drm/msm/mdss: correct HBB programmed on UBWC 5.x and 6.x devices Date: Tue, 24 Feb 2026 17:18:56 -0800 Message-ID: <20260225012354.037433961@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260225012348.915798704@linuxfoundation.org> References: <20260225012348.915798704@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dmitry Baryshkov [ Upstream commit e6177c7a2401b87b016728b75992926971d871fc ] As in the previous generations, on UBWC 5.x and 6.x devices the Highest Bank Bit value should be programmed into the hardware with the offset of -13. Correct the value written into the register to prevent unpredictable results. Fixes: 227d4ce0b09e ("drm/msm: Offset MDSS HBB value by 13") Tested-by: Val Packett # x1e80100-dell-latitude-7455 Reviewed-by: Konrad Dybcio Signed-off-by: Dmitry Baryshkov Patchwork: https://patchwork.freedesktop.org/patch/699274/ Link: https://lore.kernel.org/r/20260119-msm-ubwc-fixes-v4-1-0987acc0427f@oss.qualcomm.com Signed-off-by: Sasha Levin --- drivers/gpu/drm/msm/msm_mdss.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/msm/msm_mdss.c b/drivers/gpu/drm/msm/msm_mdss.c index 2d0e3e784c044..4dbb1b1d879f1 100644 --- a/drivers/gpu/drm/msm/msm_mdss.c +++ b/drivers/gpu/drm/msm/msm_mdss.c @@ -229,7 +229,7 @@ static void msm_mdss_setup_ubwc_dec_50(struct msm_mdss *msm_mdss) { const struct qcom_ubwc_cfg_data *data = msm_mdss->mdss_data; u32 value = MDSS_UBWC_STATIC_UBWC_SWIZZLE(data->ubwc_swizzle) | - MDSS_UBWC_STATIC_HIGHEST_BANK_BIT(data->highest_bank_bit); + MDSS_UBWC_STATIC_HIGHEST_BANK_BIT(data->highest_bank_bit - 13); if (data->ubwc_bank_spread) value |= MDSS_UBWC_STATIC_UBWC_BANK_SPREAD; -- 2.51.0