From 5febf432df1cfa5b25d99b54c32103fafbdd0eb9 Mon Sep 17 00:00:00 2001 From: Miguel Ojeda Date: Sun, 16 Aug 2026 15:32:33 +0200 Subject: kbuild: rust: keep Rust objects out of Clang LTO with inline helpers Under `CONFIG_LTO_CLANG` + `CONFIG_RUST_INLINE_HELPERS`, one may hit `objtool` errors such as: vmlinux.o: error: objtool: _R..._3Gsp4boot+0xd6a: can't find jump dest instruction at .text._R..._3Gsp4boot+0x1dfd The reason is that in such builds, the Clang invocation that compiles the combined Rust plus helpers bitcode emits LLVM bitcode (again) -- the final code generation happens in the linker's LTO step, which the `-mllvm` trap options passed to Clang do not reach. This, in turn, means that unreachable traps are missing, and the impossible paths do not merely fallthrough to the next symbol, but past the end of their own section, since LTO builds place each function in its own section. Thus filter `CC_FLAGS_LTO` out of the Clang invocation, so that it always emits machine code directly, with the traps in place. Assisted-by: LLM Cc: Gary Guo Cc: Boqun Feng Cc: Alice Ryhl Cc: Matthew Maurer Cc: Josh Poimboeuf Cc: Peter Zijlstra Cc: stable@vger.kernel.org Fixes: 3a2486cc1da5 ("kbuild: rust: provide an option to inline C helpers into Rust") Acked-by: Gary Guo Link: https://patch.msgid.link/20260816133233.197500-2-ojeda@kernel.org Signed-off-by: Miguel Ojeda --- Documentation/gpu/intel-display/async-flip.rst | 8 +++++ Documentation/gpu/intel-display/atomic.rst | 11 ++++++ Documentation/gpu/intel-display/audio.rst | 23 ++++++++++++ Documentation/gpu/intel-display/casf.rst | 8 +++++ Documentation/gpu/intel-display/cdclk.rst | 11 ++++++ Documentation/gpu/intel-display/cmtg.rst | 8 +++++ Documentation/gpu/intel-display/dmc.rst | 26 ++++++++++++++ Documentation/gpu/intel-display/dpio.rst | 8 +++++ Documentation/gpu/intel-display/dpll.rst | 14 ++++++++ Documentation/gpu/intel-display/drrs.rst | 11 ++++++ Documentation/gpu/intel-display/dsb.rst | 11 ++++++ Documentation/gpu/intel-display/fbc.rst | 11 ++++++ Documentation/gpu/intel-display/fifo-underrun.rst | 11 ++++++ Documentation/gpu/intel-display/frontbuffer.rst | 14 ++++++++ Documentation/gpu/intel-display/hotplug.rst | 11 ++++++ Documentation/gpu/intel-display/index.rst | 44 +++++++++++++++++++++++ Documentation/gpu/intel-display/plane.rst | 11 ++++++ Documentation/gpu/intel-display/psr.rst | 11 ++++++ Documentation/gpu/intel-display/snps-phy.rst | 8 +++++ Documentation/gpu/intel-display/vbt.rst | 14 ++++++++ 20 files changed, 274 insertions(+) create mode 100644 Documentation/gpu/intel-display/async-flip.rst create mode 100644 Documentation/gpu/intel-display/atomic.rst create mode 100644 Documentation/gpu/intel-display/audio.rst create mode 100644 Documentation/gpu/intel-display/casf.rst create mode 100644 Documentation/gpu/intel-display/cdclk.rst create mode 100644 Documentation/gpu/intel-display/cmtg.rst create mode 100644 Documentation/gpu/intel-display/dmc.rst create mode 100644 Documentation/gpu/intel-display/dpio.rst create mode 100644 Documentation/gpu/intel-display/dpll.rst create mode 100644 Documentation/gpu/intel-display/drrs.rst create mode 100644 Documentation/gpu/intel-display/dsb.rst create mode 100644 Documentation/gpu/intel-display/fbc.rst create mode 100644 Documentation/gpu/intel-display/fifo-underrun.rst create mode 100644 Documentation/gpu/intel-display/frontbuffer.rst create mode 100644 Documentation/gpu/intel-display/hotplug.rst create mode 100644 Documentation/gpu/intel-display/index.rst create mode 100644 Documentation/gpu/intel-display/plane.rst create mode 100644 Documentation/gpu/intel-display/psr.rst create mode 100644 Documentation/gpu/intel-display/snps-phy.rst create mode 100644 Documentation/gpu/intel-display/vbt.rst (limited to 'Documentation/gpu/intel-display') diff --git a/Documentation/gpu/intel-display/async-flip.rst b/Documentation/gpu/intel-display/async-flip.rst new file mode 100644 index 000000000..40f93e885 --- /dev/null +++ b/Documentation/gpu/intel-display/async-flip.rst @@ -0,0 +1,8 @@ +.. SPDX-License-Identifier: MIT +.. Copyright © 2026 Intel Corporation + +Asynchronous Page Flip +====================== + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_display.c + :doc: asynchronous flip implementation diff --git a/Documentation/gpu/intel-display/atomic.rst b/Documentation/gpu/intel-display/atomic.rst new file mode 100644 index 000000000..43a473181 --- /dev/null +++ b/Documentation/gpu/intel-display/atomic.rst @@ -0,0 +1,11 @@ +.. SPDX-License-Identifier: MIT +.. Copyright © 2026 Intel Corporation + +Atomic Modeset Support +====================== + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_atomic.c + :doc: atomic modeset support + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_atomic.c + :internal: diff --git a/Documentation/gpu/intel-display/audio.rst b/Documentation/gpu/intel-display/audio.rst new file mode 100644 index 000000000..eef95df75 --- /dev/null +++ b/Documentation/gpu/intel-display/audio.rst @@ -0,0 +1,23 @@ +.. SPDX-License-Identifier: MIT +.. Copyright © 2026 Intel Corporation + +High Definition Audio +===================== + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_audio.c + :doc: High Definition Audio over HDMI and Display Port + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_audio.c + :internal: + +.. kernel-doc:: include/drm/intel/i915_component.h + :internal: + +Intel HDMI LPE Audio Support +============================ + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_lpe_audio.c + :doc: LPE Audio integration for HDMI or DP playback + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_lpe_audio.c + :internal: diff --git a/Documentation/gpu/intel-display/casf.rst b/Documentation/gpu/intel-display/casf.rst new file mode 100644 index 000000000..406778ccd --- /dev/null +++ b/Documentation/gpu/intel-display/casf.rst @@ -0,0 +1,8 @@ +.. SPDX-License-Identifier: MIT +.. Copyright © 2026 Intel Corporation + +Content Adaptive Sharpness Filter (CASF) +======================================== + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_casf.c + :doc: Content Adaptive Sharpness Filter (CASF) diff --git a/Documentation/gpu/intel-display/cdclk.rst b/Documentation/gpu/intel-display/cdclk.rst new file mode 100644 index 000000000..a66d623b0 --- /dev/null +++ b/Documentation/gpu/intel-display/cdclk.rst @@ -0,0 +1,11 @@ +.. SPDX-License-Identifier: MIT +.. Copyright © 2026 Intel Corporation + +Display clocks +============== + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_cdclk.c + :doc: CDCLK / RAWCLK + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_cdclk.c + :internal: diff --git a/Documentation/gpu/intel-display/cmtg.rst b/Documentation/gpu/intel-display/cmtg.rst new file mode 100644 index 000000000..04edd0bd1 --- /dev/null +++ b/Documentation/gpu/intel-display/cmtg.rst @@ -0,0 +1,8 @@ +.. SPDX-License-Identifier: MIT +.. Copyright © 2026 Intel Corporation + +Common Primary Timing Generator (CMTG) +====================================== + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_cmtg.c + :doc: Common Primary Timing Generator (CMTG) diff --git a/Documentation/gpu/intel-display/dmc.rst b/Documentation/gpu/intel-display/dmc.rst new file mode 100644 index 000000000..4368da4c7 --- /dev/null +++ b/Documentation/gpu/intel-display/dmc.rst @@ -0,0 +1,26 @@ +.. SPDX-License-Identifier: MIT +.. Copyright © 2026 Intel Corporation + +.. _drm/intel-display/dmc: + +DMC Firmware Support +==================== + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_dmc.c + :doc: DMC Firmware Support + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_dmc.c + :internal: + + +DMC Flip Queue +============== + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_flipq.c + :doc: DMC Flip Queue + +DMC wakelock support +==================== + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_dmc_wl.c + :doc: DMC wakelock support diff --git a/Documentation/gpu/intel-display/dpio.rst b/Documentation/gpu/intel-display/dpio.rst new file mode 100644 index 000000000..84d92ac16 --- /dev/null +++ b/Documentation/gpu/intel-display/dpio.rst @@ -0,0 +1,8 @@ +.. SPDX-License-Identifier: MIT +.. Copyright © 2026 Intel Corporation + +DPIO +==== + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_dpio_phy.c + :doc: DPIO diff --git a/Documentation/gpu/intel-display/dpll.rst b/Documentation/gpu/intel-display/dpll.rst new file mode 100644 index 000000000..c750352e0 --- /dev/null +++ b/Documentation/gpu/intel-display/dpll.rst @@ -0,0 +1,14 @@ +.. SPDX-License-Identifier: MIT +.. Copyright © 2026 Intel Corporation + +Display PLLs +============ + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_dpll_mgr.c + :doc: Display PLLs + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_dpll_mgr.c + :internal: + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_dpll_mgr.h + :internal: diff --git a/Documentation/gpu/intel-display/drrs.rst b/Documentation/gpu/intel-display/drrs.rst new file mode 100644 index 000000000..a5aaba63d --- /dev/null +++ b/Documentation/gpu/intel-display/drrs.rst @@ -0,0 +1,11 @@ +.. SPDX-License-Identifier: MIT +.. Copyright © 2026 Intel Corporation + +Display Refresh Rate Switching (DRRS) +===================================== + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_drrs.c + :doc: Display Refresh Rate Switching (DRRS) + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_drrs.c + :internal: diff --git a/Documentation/gpu/intel-display/dsb.rst b/Documentation/gpu/intel-display/dsb.rst new file mode 100644 index 000000000..857aca599 --- /dev/null +++ b/Documentation/gpu/intel-display/dsb.rst @@ -0,0 +1,11 @@ +.. SPDX-License-Identifier: MIT +.. Copyright © 2026 Intel Corporation + +Display State Buffer +==================== + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_dsb.c + :doc: DSB + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_dsb.c + :internal: diff --git a/Documentation/gpu/intel-display/fbc.rst b/Documentation/gpu/intel-display/fbc.rst new file mode 100644 index 000000000..de9e19021 --- /dev/null +++ b/Documentation/gpu/intel-display/fbc.rst @@ -0,0 +1,11 @@ +.. SPDX-License-Identifier: MIT +.. Copyright © 2026 Intel Corporation + +Frame Buffer Compression (FBC) +============================== + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_fbc.c + :doc: Frame Buffer Compression (FBC) + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_fbc.c + :internal: diff --git a/Documentation/gpu/intel-display/fifo-underrun.rst b/Documentation/gpu/intel-display/fifo-underrun.rst new file mode 100644 index 000000000..5d8f01921 --- /dev/null +++ b/Documentation/gpu/intel-display/fifo-underrun.rst @@ -0,0 +1,11 @@ +.. SPDX-License-Identifier: MIT +.. Copyright © 2026 Intel Corporation + +Display FIFO Underrun Reporting +=============================== + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_fifo_underrun.c + :doc: fifo underrun handling + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_fifo_underrun.c + :internal: diff --git a/Documentation/gpu/intel-display/frontbuffer.rst b/Documentation/gpu/intel-display/frontbuffer.rst new file mode 100644 index 000000000..7ae38e082 --- /dev/null +++ b/Documentation/gpu/intel-display/frontbuffer.rst @@ -0,0 +1,14 @@ +.. SPDX-License-Identifier: MIT +.. Copyright © 2026 Intel Corporation + +Frontbuffer Tracking +==================== + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_frontbuffer.c + :doc: frontbuffer tracking + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_frontbuffer.h + :internal: + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_frontbuffer.c + :internal: diff --git a/Documentation/gpu/intel-display/hotplug.rst b/Documentation/gpu/intel-display/hotplug.rst new file mode 100644 index 000000000..f33bc0087 --- /dev/null +++ b/Documentation/gpu/intel-display/hotplug.rst @@ -0,0 +1,11 @@ +.. SPDX-License-Identifier: MIT +.. Copyright © 2026 Intel Corporation + +Hotplug +======= + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_hotplug.c + :doc: Hotplug + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_hotplug.c + :internal: diff --git a/Documentation/gpu/intel-display/index.rst b/Documentation/gpu/intel-display/index.rst new file mode 100644 index 000000000..01c3d1e57 --- /dev/null +++ b/Documentation/gpu/intel-display/index.rst @@ -0,0 +1,44 @@ +.. SPDX-License-Identifier: MIT +.. Copyright © 2026 Intel Corporation + +.. _drm/intel-display: + +==================== +Intel Display Driver +==================== + +The Intel display driver provides the display, or :ref:`drm-kms`, support for +both the :ref:`drm/xe ` and :ref:`drm/i915 ` Intel GPU +drivers. + +The source code currently resides under ``drivers/gpu/drm/i915/display`` due to +historical reasons, and it's compiled separately into both drm/xe and drm/i915 +kernel modules. + +The drm/xe and drm/i915 drivers are the "core" or "parent" drivers for display, +as they initialize and own the drm device, and pass that on to the display +driver. The display driver isn't an independent driver in that sense. + +.. toctree:: + :maxdepth: 1 + :caption: Detailed display topics + + async-flip + atomic + audio + casf + cdclk + cmtg + dmc + dpio + dpll + drrs + dsb + fbc + fifo-underrun + frontbuffer + hotplug + plane + psr + snps-phy + vbt diff --git a/Documentation/gpu/intel-display/plane.rst b/Documentation/gpu/intel-display/plane.rst new file mode 100644 index 000000000..59932a820 --- /dev/null +++ b/Documentation/gpu/intel-display/plane.rst @@ -0,0 +1,11 @@ +.. SPDX-License-Identifier: MIT +.. Copyright © 2026 Intel Corporation + +Atomic Plane Helpers +==================== + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_plane.c + :doc: atomic plane helpers + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_plane.c + :internal: diff --git a/Documentation/gpu/intel-display/psr.rst b/Documentation/gpu/intel-display/psr.rst new file mode 100644 index 000000000..63e56abcd --- /dev/null +++ b/Documentation/gpu/intel-display/psr.rst @@ -0,0 +1,11 @@ +.. SPDX-License-Identifier: MIT +.. Copyright © 2026 Intel Corporation + +Panel Self Refresh PSR (PSR/SRD) +================================ + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_psr.c + :doc: Panel Self Refresh (PSR/SRD) + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_psr.c + :internal: diff --git a/Documentation/gpu/intel-display/snps-phy.rst b/Documentation/gpu/intel-display/snps-phy.rst new file mode 100644 index 000000000..c9e333fa7 --- /dev/null +++ b/Documentation/gpu/intel-display/snps-phy.rst @@ -0,0 +1,8 @@ +.. SPDX-License-Identifier: MIT +.. Copyright © 2026 Intel Corporation + +Synopsis PHY support +==================== + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_snps_phy.c + :doc: Synopsis PHY support diff --git a/Documentation/gpu/intel-display/vbt.rst b/Documentation/gpu/intel-display/vbt.rst new file mode 100644 index 000000000..be69f7fd7 --- /dev/null +++ b/Documentation/gpu/intel-display/vbt.rst @@ -0,0 +1,14 @@ +.. SPDX-License-Identifier: MIT +.. Copyright © 2026 Intel Corporation + +Video BIOS Table (VBT) +====================== + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_bios.c + :doc: Video BIOS Table (VBT) + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_bios.c + :internal: + +.. kernel-doc:: drivers/gpu/drm/i915/display/intel_vbt_defs.h + :internal: -- cgit v1.3.1