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[92.176.231.205]) by smtp.gmail.com with ESMTPSA id h19-20020a05600c351300b003f1958eeadcsm20815145wmq.17.2023.04.28.08.12.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 28 Apr 2023 08:12:08 -0700 (PDT) From: Javier Martinez Canillas To: Thomas Zimmermann , maarten.lankhorst@linux.intel.com, mripard@kernel.org, airlied@gmail.com, daniel@ffwll.ch, deller@gmx.de, geert@linux-m68k.org, sudipm.mukherjee@gmail.com, teddy.wang@siliconmotion.com Subject: Re: [PATCH v2 11/19] fbdev/udlfb: Use struct fb_info.screen_buffer In-Reply-To: <20230428122452.4856-12-tzimmermann@suse.de> References: <20230428122452.4856-1-tzimmermann@suse.de> <20230428122452.4856-12-tzimmermann@suse.de> Date: Fri, 28 Apr 2023 17:12:07 +0200 Message-ID: <87o7n8f3co.fsf@minerva.mail-host-address-is-not-set> MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain 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: , Cc: linux-fbdev@vger.kernel.org, Thomas Zimmermann , dri-devel@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Thomas Zimmermann writes: > Use info->screen_buffer when reading and writing framebuffers in > system memory. It's the correct pointer for this address space. > > The struct fb_info has a union to store the framebuffer memory. This can > either be info->screen_base if the framebuffer is stored in I/O memory, > or info->screen_buffer if the framebuffer is stored in system memory. > > As the driver operates on the latter address space, it is wrong to use > .screen_base and .screen_buffer must be used instead. This also gets > rid of casting needed due to not using the correct data type. > > Signed-off-by: Thomas Zimmermann > --- Reviewed-by: Javier Martinez Canillas -- Best regards, Javier Martinez Canillas Core Platforms Red Hat