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[2001:14ba:a073:af00:264b:feff:fe8b:be8a]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-38ecb73de2esm31660631fa.36.2026.04.21.17.14.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 21 Apr 2026 17:14:12 -0700 (PDT) Date: Wed, 22 Apr 2026 03:14:09 +0300 From: Dmitry Baryshkov To: Thomas Zimmermann Cc: robin.clark@oss.qualcomm.com, lumag@kernel.org, abhinav.kumar@linux.dev, jesszhan0024@gmail.com, sean@poorly.run, marijn.suijten@somainline.org, airlied@gmail.com, simona@ffwll.ch, linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org Subject: Re: [PATCH 0/6] drm/msm: fbdev: Use client buffers Message-ID: References: <20260421125733.209568-1-tzimmermann@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Proofpoint-GUID: xfCnpbWmFWDB5QN5FEHALuZBAj87-nJz X-Authority-Analysis: v=2.4 cv=YJuvDxGx c=1 sm=1 tr=0 ts=69e812d7 cx=c_pps a=P2rfLEam3zuxRRdjJWA2cw==:117 a=xqWC_Br6kY4A:10 a=kj9zAlcOel0A:10 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=ZpdpYltYx_vBUK5n70dp:22 a=KNjA7eja_kyHsgebIicA:9 a=CjuIK1q_8ugA:10 a=ODZdjJIeia2B_SHc_B0f:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDIyMDAwMCBTYWx0ZWRfX6RanNU4/GA+H tl9kVxdG+u6Plp4sHFu4mhJQ62PJ9ozYA1ctQfmG8RpAeY8McxLfbuG/1GgwOH21BnSVVhICkQ1 Ia0oTK09yYyWNpcJVklzCUsA6ooo06cFZvA4L2Zro0EZedK0snzNOahQbvXqq+OUtvRbSQE7Wgy +eYonF8wmfiBZYijaefK45rjTiEkhO1onT+cBvOOq+vtO82GgKPupaEO22AHygafeUHiwxtdTle kvSx9koy0j5wTrnlk6BSn5DBagFQK8j9nPiHIdbymo9Tc6g0GMrSWfbipWjW9HJzh6tcFlrl1KO HAHN21fAqMAc+5YUP7CSU75C2LOAiFGgy8gdGB0N1f1A5SGtcqIStVh6KtcL3xks58AZLeNlMHU +TB7LKwibBGsN/0MFdVUw77vSvte8eyQOxho/AgujSZuVmsDHrqbPFvuAQRLImDLHLWdL7TOYMB VSOOQHgJy8XQm1l03nA== X-Proofpoint-ORIG-GUID: xfCnpbWmFWDB5QN5FEHALuZBAj87-nJz 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=2026-04-21_03,2026-04-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 phishscore=0 lowpriorityscore=0 adultscore=0 spamscore=0 malwarescore=0 impostorscore=0 priorityscore=1501 bulkscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2604220000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Tue, Apr 21, 2026 at 07:08:31PM +0300, Dmitry Baryshkov wrote: > On Tue, Apr 21, 2026 at 02:51:13PM +0200, Thomas Zimmermann wrote: > > A client buffer holds the DRM framebuffer for an in-kernel DRM > > client. Until now, msm created an internal ad-hoc framebuffer for > > its fbdev emulation, while by-passing the regular interfaces used by > > user-space compositors. > > I assume this was somewhat because we supported using the stolen memory > for FB. Support for it has been dropped when we moved to GPUVM. > > Rob, would it be possible to get it back at some point? > > Thomas, would the series prevent us from using the stolen memory for FB? And answering my question, no, we still can continue using stolen memory for the FB. -- With best wishes Dmitry