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[178.79.73.218]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-429952da645sm14913054f8f.30.2025.10.27.11.11.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Oct 2025 11:11:53 -0700 (PDT) From: Jernej =?UTF-8?B?xaBrcmFiZWM=?= To: wens@csie.org Cc: mripard@kernel.org, maarten.lankhorst@linux.intel.com, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, samuel@sholland.org, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org Subject: Re: [PATCH 07/30] drm/sun4i: Move blender config from layers to mixer Date: Mon, 27 Oct 2025 19:11:52 +0100 Message-ID: <3382705.44csPzL39Z@jernej-laptop> In-Reply-To: References: <20251012192330.6903-1-jernej.skrabec@gmail.com> <20251012192330.6903-8-jernej.skrabec@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251027_111156_027032_C6D6F8E0 X-CRM114-Status: GOOD ( 14.63 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Dne ponedeljek, 27. oktober 2025 ob 17:00:05 Srednjeevropski standardni =C4= =8Das je Chen-Yu Tsai napisal(a): > On Mon, Oct 13, 2025 at 3:23=E2=80=AFAM Jernej Skrabec wrote: > > > > With upcoming DE33 support, layer management must be decoupled from > > other operations like blender configuration. There are two reasons: > > - DE33 will have separate driver for planes and thus it will be harder > > to manage different register spaces >=20 > So if I understand correctly: >=20 > - the "layer" is from DMA up to CSC, which is the last stage before routi= ng > - in DE30 and before, routing was limited to within one mixer > - in DE33 and onward, routing is global If you mean routing layers, then yes. =46or example, you have pool of 4 UI planes and 3 VI planes. You can assign= them in any combination to both mixers. Later you have additional Z-pos routing = too within mixer. >=20 > > - Architecturaly it's better to split access by modules. Blender is now > > exclusively managed by mixer. > > > > Signed-off-by: Jernej Skrabec >=20 > Reviewed-by: Chen-Yu Tsai >=20 Thanks. Best regards, Jernej