motorola-rtwo: add framebuffer console + pstore for bring-up debugging
The device resets right after 'fastboot boot' with no output. Add tools to see why: - rtwo.config kernel fragment: PSTORE_RAM=y + PSTORE_CONSOLE=y (capture the kernel log in ramoops at 0xae000000, readable afterwards from stock Android or a later pmOS boot), QCOM_WDT=y (pet the APSS watchdog early in case the bootloader armed it), FB_SIMPLE/FRAMEBUFFER_CONSOLE on. - .dts: simple-framebuffer at 0xb8000000 reworked (x8r8g8b8, 1080x2400) - reuses the bootloader framebuffer, no panel driver needed. - deviceinfo cmdline: console=tty0 (framebuffer console), ignore_loglevel, clk_ignore_unused + pd_ignore_unused (keep the bootloader display path powered so the framebuffer does not freeze). Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01QF5HebjUsRaxbW4cBX6HJP
This commit is contained in:
Claude Sonnet 5
@@ -2,7 +2,7 @@
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maintainer="snlavaise <snlavaise@gmail.com>"
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pkgname=device-motorola-rtwo
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pkgver=1
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pkgrel=1
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pkgrel=2
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pkgdesc="Motorola Moto Edge 40 Pro"
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url="https://postmarketos.org"
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arch="aarch64"
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@@ -36,6 +36,6 @@ package() {
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}
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sha512sums="
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32c5054a403dc98169061e7aae2bab06b014089f7563ab65515923b1b07ead8832476107f87ecbd94575c69c92ea91eef6db9effe788b0b71e893cfb62e8963b deviceinfo
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90b9cef36ae91c1c640cc32f878ad8ea2e66fa22ae472fdaafa8c3a34bc77c59612daabf9688a7d2bb7b0051d48cb298fe6c8388a1de3434a387ed48c7fd4f65 deviceinfo
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c572e21cb0624b554a22a218b0c4faab9b6412654bed6bfef530f3068d076b21c573bd7f4b3ca65f510f8756f636a861191cce925ef49587db7d68d09558826c modules-initfs
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"
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@@ -27,7 +27,7 @@ deviceinfo_no_framebuffer="false"
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# Bootloader related
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deviceinfo_flash_method="fastboot"
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deviceinfo_kernel_cmdline="console=ttyMSM0,115200n8 earlycon"
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deviceinfo_kernel_cmdline="console=tty0 console=ttyMSM0,115200n8 earlycon clk_ignore_unused pd_ignore_unused ignore_loglevel"
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deviceinfo_generate_bootimg="true"
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deviceinfo_bootimg_qcdt="false"
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deviceinfo_header_version="4"
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@@ -4,7 +4,7 @@ maintainer="snlavaise <snlavaise@gmail.com>"
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_flavor="postmarketos-qcom-sm8550"
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pkgname=linux-$_flavor
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pkgver=6.13_rc3
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pkgrel=0
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pkgrel=1
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pkgdesc="Mainline kernel fork for Qualcomm SM8550 (Snapdragon 8 Gen 2) devices"
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arch="aarch64"
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_carch="arm64"
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@@ -42,6 +42,7 @@ _commit="22591bbc21da5cc0c6e37503b77bd2d852fe241c"
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source="
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$pkgname-$_commit.tar.gz::https://gitlab.postmarketos.org/soc/qcom-sm8550/linux/-/archive/$_commit/linux-$_commit.tar.gz
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sm8550-motorola-rtwo.dts
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rtwo.config
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"
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builddir="$srcdir/linux-$_commit"
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@@ -58,12 +59,14 @@ prepare() {
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fi
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# Generate .config from the in-tree upstream defconfig plus the postmarketOS
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# and device config fragments shipped by the kernel repo.
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# and device config fragments shipped by the kernel repo, then merge the
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# rtwo bring-up fragment on top.
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# To "freeze" this config: build once, copy "$builddir"/.config to
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# config-$_flavor.$CARCH, add it to source= and switch prepare() to a plain
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# 'cp "$srcdir/config-$_flavor.$CARCH" .config' (like the other qcom kernels).
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cp "$srcdir/rtwo.config" arch/$_carch/configs/rtwo.config
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make ARCH="$_carch" LLVM=1 HOSTLDFLAGS="-fuse-ld=lld" \
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defconfig pmos.config devices.config
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defconfig pmos.config devices.config rtwo.config
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}
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build() {
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@@ -105,5 +108,6 @@ package() {
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# 'pmbootstrap checksum linux-postmarketos-qcom-sm8550' (it downloads ~250 MB).
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sha512sums="
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19f6d0ee8481e34b0b8c27f07f3023182cda9e2a3d67e40989b1f300b7e82d7ea606fb112599dd9399e0d5f973d43b289d8932a4b578b6ffe4168af05e19f795 linux-postmarketos-qcom-sm8550-22591bbc21da5cc0c6e37503b77bd2d852fe241c.tar.gz
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11210b15854d92754b7bc801c1e807497b3336585498770d62d5aec6f81bc5b0b0ad6f775421e3af34edaece04f2b81e9bbc01381b78d1030d97598902d6fb11 sm8550-motorola-rtwo.dts
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71270b409e4fc5b6f5ddd164629c937e5ad783761c8a290d46d36a3ba21a96702c1861bfc20e0a1225b2af6d88d21333b5a9c82149f125ed42385c9c7dd207cf sm8550-motorola-rtwo.dts
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91cebe340d9e1a3f308725ced37d2f6c4695869100e198d693317f476b1123128b1b24a0604f4aa132d6269de68a87017485149df7d2924cf3a09241b999ffcf rtwo.config
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"
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@@ -0,0 +1,31 @@
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# Extra kernel config for the Motorola rtwo bring-up.
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# Merged on top of defconfig + pmos.config + devices.config.
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# Purpose: get diagnostic output on a device with no working display/UART yet.
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# --- pstore / ramoops -------------------------------------------------------
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# Capture the kernel console into the reserved ramoops region (0xae000000,
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# same address the stock firmware uses) so that after a failed boot the log
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# can be read back - from a later pmOS boot, or from stock Android
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# (/sys/fs/pstore/console-ramoops-0).
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CONFIG_PSTORE=y
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CONFIG_PSTORE_RAM=y
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CONFIG_PSTORE_CONSOLE=y
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CONFIG_PSTORE_PMSG=y
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CONFIG_PSTORE_COMPRESS=y
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# --- watchdog -------------------------------------------------------------
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# The bootloader may hand off with the APSS watchdog armed; build the driver
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# in so the kernel starts petting it early instead of getting reset.
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CONFIG_QCOM_WDT=y
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# --- framebuffer console -------------------------------------------------
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# Show the boot log on the panel by reusing the bootloader's framebuffer
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# (simple-framebuffer node in the .dts). No panel driver required.
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CONFIG_FB=y
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CONFIG_FB_SIMPLE=y
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CONFIG_FRAMEBUFFER_CONSOLE=y
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CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
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# --- misc bring-up aids -------------------------------------------------
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CONFIG_MAGIC_SYSRQ=y
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CONFIG_LOG_BUF_SHIFT=18
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@@ -57,10 +57,15 @@
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stdout-path = "serial0:115200n8";
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/*
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* Bootloader continuous-splash framebuffer. Geometry is a best
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* guess (1080x2400, 32bpp) from the stock cont_splash /
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* disp_rdump region. If the display stays black or garbled,
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* adjust format/stride or drop this node.
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* Bootloader continuous-splash framebuffer, reused as an early
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* console (CONFIG_FB_SIMPLE). Needs no panel driver.
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*
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* Panel is 1080x2400 (NT37705). Format/base are a best guess
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* from the stock cont_splash / disp_rdump regions. If the screen
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* is garbled: try format "x8r8g8b8" -> "r5g6b5" (and stride
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* 1080*2) -> drop the node. If it is offset/torn, the stride is
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* wrong. If it shows briefly then freezes, the display clocks
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* got gated - add "clk_ignore_unused" to the kernel cmdline.
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*/
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framebuffer0: framebuffer@b8000000 {
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compatible = "simple-framebuffer";
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@@ -68,7 +73,7 @@
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width = <1080>;
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height = <2400>;
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stride = <(1080 * 4)>;
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format = "a8r8g8b8";
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format = "x8r8g8b8";
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};
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};
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