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[34.91.20.140]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-ab384f87065sm199197966b.133.2025.01.17.09.09.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 17 Jan 2025 09:09:58 -0800 (PST) From: =?utf-8?q?Andr=C3=A9_Draszik?= Date: Fri, 17 Jan 2025 17:09:55 +0000 Subject: [PATCH v4 2/4] arm64: dts: exynos: gs101-oriole: configure simple-framebuffer MIME-Version: 1.0 Message-Id: <20250117-gs101-simplefb-v4-2-a5b90ca2f917@linaro.org> References: <20250117-gs101-simplefb-v4-0-a5b90ca2f917@linaro.org> In-Reply-To: <20250117-gs101-simplefb-v4-0-a5b90ca2f917@linaro.org> To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Peter Griffin , Tudor Ambarus , Alim Akhtar Cc: Will McVicker , kernel-team@android.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, =?utf-8?q?Andr=C3=A9_Draszik?= X-Mailer: b4 0.13.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250117_091000_292835_13EF4AA5 X-CRM114-Status: GOOD ( 11.77 ) 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 The bootloader configures the display hardware for a framebuffer at the given address, let's add a simple-framebuffer node here until we get a proper DRM driver. This has several benefits since it's an OLED display: * energy consumption goes down significantly, as it changes from white (as left by bootloader) to black (linux console), and we generally don't run out of battery anymore when plugged into a USB port * less of a burn-in effect I assume * phone stays cooler due to reduced energy consumption by display Signed-off-by: André Draszik Reviewed-by: Peter Griffin --- v3: - replace property 'reg' with 'memory-region' and related properties to reduce churn in preparation for Pixel 6Pro support - drop tags due to that --- arch/arm64/boot/dts/exynos/google/gs101-oriole.dts | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/arch/arm64/boot/dts/exynos/google/gs101-oriole.dts b/arch/arm64/boot/dts/exynos/google/gs101-oriole.dts index e58881c61d53..d3dd411c9bd0 100644 --- a/arch/arm64/boot/dts/exynos/google/gs101-oriole.dts +++ b/arch/arm64/boot/dts/exynos/google/gs101-oriole.dts @@ -26,6 +26,16 @@ chosen { /* Bootloader expects bootargs specified otherwise it crashes */ bootargs = ""; stdout-path = &serial_0; + + /* Use display framebuffer as setup by bootloader */ + framebuffer0: framebuffer-0 { + compatible = "simple-framebuffer"; + memory-region = <&cont_splash_mem>; + width = <1080>; + height = <2400>; + stride = <(1080 * 4)>; + format = "a8r8g8b8"; + }; }; gpio-keys { @@ -69,6 +79,13 @@ ufs_0_fixed_vcc_reg: regulator-1 { regulator-boot-on; enable-active-high; }; + + reserved-memory { + cont_splash_mem: splash@fac00000 { + reg = <0x0 0xfac00000 (1080 * 2400 * 4)>; + no-map; + }; + }; }; &ext_24_5m {