From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (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 BECA3370D47 for ; Wed, 1 Apr 2026 09:32:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.168.131 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775035965; cv=none; b=SXOubT646BMocHaX6Dyl1tlF2gi8ojsLWqPVT/3D4iewAEbyJotli3VgMNoNnB7ZHkw2rpFgNZPWnyKAHZCF+8HcoyylLYfUvPJvwVI41Mw41o/16kzSNwsFKQXbg1QuFhI2yh8SxMmbMLGQK+SWaJfTmK3JXcGR9+1SyRWP14E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775035965; c=relaxed/simple; bh=z+EDexiLErPSTkuOyOJaYzNKm8uMdyFNbjxzeJ/ozbA=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=LlolYb2hX0343ZzA9GDKQ2/dUyIgGWNtAFBVjUMKP6LamSc/7G1161yVJjTIk0PJnp27Q3GPu9HxoV+/acRklIVIIB1rzKZj8OvEksctWVc7fr9n2JV+dZB0rFdFNkg2Qc5z6nVIEKlOIV7X8AK9EbE9XRjVVtL8lr4kQZ/i7LA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com; spf=pass smtp.mailfrom=oss.qualcomm.com; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b=mktgjZKc; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b=hSOi10az; arc=none smtp.client-ip=205.220.168.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b="mktgjZKc"; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b="hSOi10az" Received: from pps.filterd (m0279864.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 6318kNIY1459094 for ; Wed, 1 Apr 2026 09:32:43 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qualcomm.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= 8DZG0eROtWmud3ZdD4EmRKx3UCJmwtzdRxZUWrs7KTg=; b=mktgjZKc5bsnghQB ydBx3gbKjuZl2Vc6GW1EQtrSd7z2FBd5HsZucM+iz8rkJeKapfrvbD1JoCRvwBcQ A1OatOYwGhrHve47u8wfK0oywq0GbN40neBP5MZII6Tlqdiyq5CrAYSQPUml0hPh HKe8HKggE775HlyGcrhvI8tkJj0KvL3RnmVw9cZ22Ry6gxEbfEZBVnsoWJR2oMya xKd9aYzS9op0Q91wVMov8v+WJkIQh0Ag2AhZR5Dqs/vupg1t4QiHHLFE6ICSHEu4 rvaTC2rKwOx4vWVxdYZw3JDDatLCWAMiJQ1a7Py8XpFIgzOFpZGZPify0HB02+ub /lBB6Q== Received: from mail-qv1-f71.google.com (mail-qv1-f71.google.com [209.85.219.71]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4d8uhg1dp9-1 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NOT) for ; Wed, 01 Apr 2026 09:32:43 +0000 (GMT) Received: by mail-qv1-f71.google.com with SMTP id 6a1803df08f44-89f3e41fc17so18158426d6.2 for ; Wed, 01 Apr 2026 02:32:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oss.qualcomm.com; s=google; t=1775035962; x=1775640762; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=8DZG0eROtWmud3ZdD4EmRKx3UCJmwtzdRxZUWrs7KTg=; b=hSOi10azBvej0dS69srM7y4sx90FOe77VdygDcl4MB+7NFrHl2PztABorOvDctXswL M2XEHqfwtPcRagLKtgVVlQDQPG+uYJi5G5a67JsXYhrpU+kQYfjsf+aBXrvfcBs7re1H Pd56iqLb7JUw8e61I454GEbEJSIcgDg0yAPptoQwQ7OgkcTmS5fwcYD698xPMnVY4Jy3 pB039A9afmLq8GT4HdNMgJvDwHeLpFEpvxWo9fm5QnGnYPqm3Pug0IEdQhLpfFrEQ/wI ht3NXGqNusRvGbtpOHJQqjz0tpW+nCXbk5UPDe6VFyJzMmiB+asIcTHjhmwzSA9QFr5L crmQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1775035962; x=1775640762; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-gg:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=8DZG0eROtWmud3ZdD4EmRKx3UCJmwtzdRxZUWrs7KTg=; b=YLwlKwCHz/JWZXg1vR26U7h/hEcrwa2dlXvsbrt7AEoY4EkzA0j4sOoHU0AnIrbyem uWnyrii7V7IVb3REWfaDn2FaXBZkErPaofXac9MkRt4msK/EEmA4DypkvMqibzB1kp8J 4sIGkDsBwh1Hm6801zXmCx1y2MtCR7kjL/+Rf9YWRC1PeZoLDaO5/NYMjr9Jr91zL3z6 CYie71tmKWuzzH4JX3iSrYEySjdqR5zsWRlcIegLR9ByPqhr5UDDz4YxeexJFNZi/JEb KzC02NucjMxL5HMd9qtUwPknVVNZh+AAYeYIIoj5l6nCmF0bRTs24cdgYfp3SQCEFOXx gLZA== X-Forwarded-Encrypted: i=1; AJvYcCXo+8hfVkgBd3Yoz1L/ZaXQ0U6Qpogj0pUz2Q57lV/b+1nRNVJzMJO2BleSRuG5RobrRDCrIN3iY4o2/Ki3@vger.kernel.org X-Gm-Message-State: AOJu0YzbLjNRJUZ9/utOxtgBTK//ppfJNYnzC9BElJRRy52CQ/74NeNT SZo4DfTbAxVZ4C0Hd1JPAzMuxjR+JSR9r0BHx08IyQruTpl4phEg99WVLDq2179qv0obHvSkDBE vHvoGAfg1hF9M2cuXRVmVpor4+ed6TULSDsrzbXjhxeEY/DUcAWvNDLq+9oXVnqJRmo+k X-Gm-Gg: ATEYQzwfAo9TZNzVSpDAcopXJwXPCwGTYO4Mn9cG7ZaYagqm+7JIghmA0OWxi0cMSD3 eDwrtHxZD/agLlv1/pRdnIHh+glvLtgPTMuaP0y3EVScL9niC8/0iK26vfVRftq4aoATNwmyhoz ze0EeyND6Bf8/4ehgNtqStfOdle044cNvebyVm8kgoRfnkIc2RrfOYM6ehYbx7bKTtdJWTXh/el yf/lsrigvmMF+u951ah277D0qrRDIjLPVXlyfAEQuhV/ACWObMNhaw4HlVg1mVCh9pRbTDOCgTJ 5tZ17bkVoEEaYrRkXHxlMC0oV+qdf8VjLLIOA7HpazM7tSY6e/eMYerDSs6gDgaE8MgeQcVB+JO yJaa7wkNPkJfHC97qDjeugPYD633Y3XIwKSrIyrJ9q5MTt7shGedoXkSuFmbjozn3R9UgeQ5av8 2mG2k= X-Received: by 2002:a05:6214:627:b0:89a:5129:510f with SMTP id 6a1803df08f44-8a433f48ddcmr31691416d6.0.1775035961955; Wed, 01 Apr 2026 02:32:41 -0700 (PDT) X-Received: by 2002:a05:6214:627:b0:89a:5129:510f with SMTP id 6a1803df08f44-8a433f48ddcmr31691156d6.0.1775035961433; Wed, 01 Apr 2026 02:32:41 -0700 (PDT) Received: from [192.168.119.254] (078088045245.garwolin.vectranet.pl. [78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b9c0cce9b2esm115233666b.26.2026.04.01.02.32.37 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 01 Apr 2026 02:32:39 -0700 (PDT) Message-ID: <387635e8-d49e-4e08-bd26-e76838bb27d5@oss.qualcomm.com> Date: Wed, 1 Apr 2026 11:32:36 +0200 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 4/6] drm/msm/a8xx: use pipe protect slot 15 for last-span-unbound feature To: Alexander Koskovich , Rob Clark , Dmitry Baryshkov , Abhinav Kumar , Jessica Zhang , Sean Paul , Marijn Suijten , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Konrad Dybcio , Akhil P Oommen , Bjorn Andersson Cc: Luca Weiss , linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260331-adreno-810-v1-0-725801dbb12b@pm.me> <20260331-adreno-810-v1-4-725801dbb12b@pm.me> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260331-adreno-810-v1-4-725801dbb12b@pm.me> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDAxMDA4NiBTYWx0ZWRfX9vMCkEGq3Ty5 PSsCjolE7AyHwRXnur9fwOvb/7esUL4W11eenIjZwK4LxZubEclFT6stQxTSVLcHryXxhnYnkeg VO6Q/KOgp6s8fjCgHZMH3pGomNvNVM0nDOJae4VRBGEgZsxcBXj+/S13Vm8aLR74E96EcNSRLra 8IXrK0gkaTDRjo0rPG/4kmAwRfasujnT93cCdtIWmwnZoyt1qfG9imhKNWdpfdWXk5ZxSOqZwsq 1t2MaJ9ygMAoQhJ2jC1BtmJhGGTYlAIzkOOt3eAgqPDa6uaPaA3gFplR/Gl4S9+xgEEPKtdfRgL DF3I7lE49GUj9HDwKIsj8K5K5xVpx1GYd0mjzjukD4JKEF2Oo9VmdMckmUZDSbOEpKMHSUvSTE5 GJccJSpH74gZMy0IrL3V0+9lcWpkgLTJsjWwexlPERI/y3hIfV3NvQxDzyFofBTJvjv5FPLl5yp MsBx4ykFuTTaNNu7pKg== X-Authority-Analysis: v=2.4 cv=YcawJgRf c=1 sm=1 tr=0 ts=69cce63b cx=c_pps a=UgVkIMxJMSkC9lv97toC5g==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=DJpcGTmdVt4CTyJn9g5Z:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=qGQNF-HaROJYSwuyTOwA:9 a=QEXdDO2ut3YA:10 a=1HOtulTD9v-eNWfpl4qZ:22 X-Proofpoint-GUID: ZWsfJRC3Zrz5ZLc9X-ecGbvKNBnSwqh6 X-Proofpoint-ORIG-GUID: ZWsfJRC3Zrz5ZLc9X-ecGbvKNBnSwqh6 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-01_03,2026-04-01_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 priorityscore=1501 adultscore=0 clxscore=1015 suspectscore=0 malwarescore=0 impostorscore=0 spamscore=0 lowpriorityscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2604010086 On 4/1/26 4:17 AM, Alexander Koskovich wrote: > A8XX GPUs have two sets of protect registers: 64 global slots and 16 > pipe specific slots. The last-span-unbound feature is only available > on pipe protect registers, and should always target pipe slot 15. > > This matches the downstream driver which hardcodes pipe slot 15 for > all A8XX GPUs (GRAPHICS.LA.15.0.r1) and resolves protect errors on > A810. > > Signed-off-by: Alexander Koskovich > --- > drivers/gpu/drm/msm/adreno/a8xx_gpu.c | 9 +++++---- > 1 file changed, 5 insertions(+), 4 deletions(-) > > diff --git a/drivers/gpu/drm/msm/adreno/a8xx_gpu.c b/drivers/gpu/drm/msm/adreno/a8xx_gpu.c > index 5af82d43f1e4..63387ee9b04a 100644 > --- a/drivers/gpu/drm/msm/adreno/a8xx_gpu.c > +++ b/drivers/gpu/drm/msm/adreno/a8xx_gpu.c > @@ -252,11 +252,12 @@ static void a8xx_set_cp_protect(struct msm_gpu *gpu) > } > > /* > - * Last span feature is only supported on PIPE specific register. > - * So update those here > + * Last span setting is only being applied to the last pipe specific > + * register. Hence duplicate the last span from protect reg into the > + * BR and BV protect reg pipe 15. > */ > - a8xx_write_pipe(gpu, PIPE_BR, REG_A8XX_CP_PROTECT_PIPE(protect->count_max), final_cfg); > - a8xx_write_pipe(gpu, PIPE_BV, REG_A8XX_CP_PROTECT_PIPE(protect->count_max), final_cfg); > + a8xx_write_pipe(gpu, PIPE_BR, REG_A8XX_CP_PROTECT_PIPE(15), final_cfg); > + a8xx_write_pipe(gpu, PIPE_BV, REG_A8XX_CP_PROTECT_PIPE(15), final_cfg); I think this is a better fix than: https://lore.kernel.org/linux-arm-msm/20260225-glymur-protect-fix-v1-1-0deddedf9277@oss.qualcomm.com/ which will let us bring back the BUILD_BUG_ON.. WDYT Akhil? FWIW KGSL just hardcodes the number 15 here as well.. may make it configurable if that ever changes Reviewed-by: Konrad Dybcio Konrad