| Message ID | 20241216-gs101-simplefb-v1-2-8ccad1830281@linaro.org (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | Google Pixel 6 (simple) framebuffer support | expand |
Hi Andre On Mon, 16 Dec 2024 at 13:06, André Draszik <andre.draszik@linaro.org> wrote: > > 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 <andre.draszik@linaro.org> > --- Reviewed-by: Peter Griffin <peter.griffin@linaro.org> Tested-by: Peter Griffin <peter.griffin@linaro.org> Tested on Oriole device, with latest initramfs and framebuffer was functional. regards, Peter
diff --git a/arch/arm64/boot/dts/exynos/google/gs101-oriole.dts b/arch/arm64/boot/dts/exynos/google/gs101-oriole.dts index e58881c61d53..4e1625e3fbb4 100644 --- a/arch/arm64/boot/dts/exynos/google/gs101-oriole.dts +++ b/arch/arm64/boot/dts/exynos/google/gs101-oriole.dts @@ -23,9 +23,23 @@ aliases { }; chosen { + #address-cells = <2>; + #size-cells = <1>; + ranges; + /* Bootloader expects bootargs specified otherwise it crashes */ bootargs = ""; stdout-path = &serial_0; + + /* Use display framebuffer as setup by bootloader */ + framebuffer0: framebuffer@fac00000 { + compatible = "simple-framebuffer"; + reg = <0x0 0xfac00000 (1080 * 2400 * 4)>; + width = <1080>; + height = <2400>; + stride = <(1080 * 4)>; + format = "a8r8g8b8"; + }; }; gpio-keys { @@ -69,6 +83,13 @@ 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 {
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 <andre.draszik@linaro.org> --- arch/arm64/boot/dts/exynos/google/gs101-oriole.dts | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+)