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Mon, 20 Jan 2025 08:57:37 +0000 Message-ID: Date: Mon, 20 Jan 2025 09:57:37 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 25/25] drm/xlnx: Compute dumb-buffer sizes with drm_mode_size_dumb() To: Tomi Valkeinen , maarten.lankhorst@linux.intel.com, mripard@kernel.org, airlied@gmail.com, simona@ffwll.ch Cc: dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, freedreno@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, imx@lists.linux.dev, linux-samsung-soc@vger.kernel.org, nouveau@lists.freedesktop.org, virtualization@lists.linux.dev, spice-devel@lists.freedesktop.org, linux-renesas-soc@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-tegra@vger.kernel.org, intel-xe@lists.freedesktop.org, xen-devel@lists.xenproject.org, Laurent Pinchart , Andy Yan , Daniel Stone References: <20250109150310.219442-1-tzimmermann@suse.de> <20250109150310.219442-26-tzimmermann@suse.de> <0ea6be58-0e04-4172-87cd-064a3e4a43bc@suse.de> <4af0b6a7-c16a-4187-bbf5-365a9c86de21@suse.de> <156804a9-3095-4c93-888f-d9041f523da6@suse.de> <469daa7f-123b-41cb-a99c-4441436d82dc@ideasonboard.com> Content-Language: en-US From: Thomas Zimmermann Autocrypt: addr=tzimmermann@suse.de; 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RCVD_COUNT_TWO(0.00)[2]; DKIM_TRACE(0.00)[suse.de:+] X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Rspamd-Action: no action X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" Hi Am 20.01.25 um 09:51 schrieb Tomi Valkeinen: > Hi, > > On 20/01/2025 09:49, Thomas Zimmermann wrote: >> Hi >> >> >> Am 16.01.25 um 11:03 schrieb Tomi Valkeinen: >> [...] >>> Aligning video= and dumb buffers almost sounds like going backwards. >>> video= parameter is bad, >> >> Who told you that? Video= is still the way to specify an initial >> display mode to the kernel and it will remain so. > > You did =). "It aligns dumb buffers and video=". I did not tell you "video= parameter is bad". Best regards Thomas > I understand the need for drm_driver_color_mode_format() for video=. > But I think it's bad for CREATE_DUMB, at least for the platforms which > have never aimed for "RGB-only". > > So you're not in favor of a drm_mode_size_dumb() version that does not > use drm_driver_color_mode_format(), for these platforms? I'm still at > loss as to why we would want to change the behavior of CREATE_DUMB. I > see no upside, but I see the chance of regressions. > >  Tomi > -- -- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Frankenstrasse 146, 90461 Nuernberg, Germany GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman HRB 36809 (AG Nuernberg)