From 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d Mon Sep 17 00:00:00 2001 From: Zeng Chi Date: Mon, 21 Sep 2026 18:24:42 +0800 Subject: KVM: Don't pre-reserve xarray entries when storing empty/NULL attributes Skip the xarray reservation loop when clearing all memory attributes, as storing NULL only erases the entry and never needs to allocate, so no reservation (and no cleanup of a failed one) is required in that case. Suggested-by: Sean Christopherson Cc: David Ballesteros Signed-off-by: Zeng Chi Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com [sean: split to separate patch] Signed-off-by: Sean Christopherson --- Documentation/gpu/meson.rst | 55 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 Documentation/gpu/meson.rst (limited to 'Documentation/gpu/meson.rst') diff --git a/Documentation/gpu/meson.rst b/Documentation/gpu/meson.rst new file mode 100644 index 000000000..b9e2f9aa3 --- /dev/null +++ b/Documentation/gpu/meson.rst @@ -0,0 +1,55 @@ +============================================= +drm/meson AmLogic Meson Video Processing Unit +============================================= + +.. kernel-doc:: drivers/gpu/drm/meson/meson_drv.c + :doc: Video Processing Unit + +Video Processing Unit +===================== + +The Amlogic Meson Display controller is composed of several components +that are going to be documented below: + +.. code:: + + DMC|---------------VPU (Video Processing Unit)----------------|------HHI------| + | vd1 _______ _____________ _________________ | | + D |-------| |----| | | | | HDMI PLL | + D | vd2 | VIU | | Video Post | | Video Encoders |<---|-----VCLK | + R |-------| |----| Processing | | | | | + | osd2 | | | |---| Enci ----------|----|-----VDAC------| + R |-------| CSC |----| Scalers | | Encp ----------|----|----HDMI-TX----| + A | osd1 | | | Blenders | | Encl ----------|----|---------------| + M |-------|______|----|____________| |________________| | | + ___|__________________________________________________________|_______________| + +Video Input Unit +================ + +.. kernel-doc:: drivers/gpu/drm/meson/meson_viu.c + :doc: Video Input Unit + +Video Post Processing +===================== + +.. kernel-doc:: drivers/gpu/drm/meson/meson_vpp.c + :doc: Video Post Processing + +Video Encoder +============= + +.. kernel-doc:: drivers/gpu/drm/meson/meson_venc.c + :doc: Video Encoder + +Video Clocks +============ + +.. kernel-doc:: drivers/gpu/drm/meson/meson_vclk.c + :doc: Video Clocks + +HDMI Video Output +================= + +.. kernel-doc:: drivers/gpu/drm/meson/meson_dw_hdmi.c + :doc: HDMI Output -- cgit v1.3.1