Messages in this thread | | | Date | Sat, 20 May 2023 19:57:50 +0800 | Subject | Re: [v13,1/2] drm: add kms driver for loongson display controller | From | Sui Jingfeng <> |
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Hi,
On 2023/5/19 18:04, Liu Peibao wrote: > I test this on my 3A5000 + 7A1000 and 3A5000 + 7A2000 desktop, > and this works well, so: > > Tested-by: Liu Peibao <liupeibao@loongson.cn>
Thanks a lot.
> Br, > Peibao > > On 5/15/23 11:57 PM, Sui Jingfeng wrote: >> Loongson display controller IP has been integrated in both Loongson north >> bridge chipset(ls7a1000/ls7a2000) and Loongson SoCs(ls2k1000/ls2k2000), it >> has been even included in Loongson self-made BMC products. >> >> This display controller is a PCI device. It has two display pipes and each >> display pipe support a primary plane and a cursor plane. For the DC in the >> ls7a1000 and ls2k1000, each display pipe has a DVO output interface which >> provide RGB888 signals, vertical & horizontal synchronisations and pixel >> clock. Each CRTC is able to support 1920x1080@60Hz, the maximum resolution >> of each display pipe is 2048x2048 according to the hardware spec. >> >> For the DC in LS7A2000, each display pipe is equipped with a built-in HDMI >> encoder which is compliant with the HDMI 1.4 specification, thus it support >> 3840x2160@30Hz. The first display pipe is also equipped with a transparent >> vga encoder which is parallel with the HDMI encoder. The DC in LS7A2000 is >> more complete compare with the one in old chips, besides above feature, it >> has two hardware cursors, two hardware vblank counter and two scanout >> position recorders unit. It also support tiled framebuffer format which >> can be scanout the tiled framebuffer rendered by the LoongGPU directly. >> >> v1 -> v2: >> 1) Use hpd status reg when polling for ls7a2000 >> 2) Fix all warnings emerged when compile with W=1 >> >> v2 -> v3: >> 1) Add COMPILE_TEST in Kconfig and make the driver off by default >> 2) Alphabetical sorting headers (Thomas) >> 3) Untangle register access functions as much as possible (Thomas) >> 4) Switch to TTM based memory manager and prefer cached mapping >> for Loongson SoC (Thomas) >> 5) Add chip id detection method, now all models are distinguishable. >> 6) Revise builtin HDMI phy driver, nearly all main stream mode >> below 4K@30Hz is tested, this driver supported these mode very >> well including clone display mode and extend display mode. >> >> v3 -> v4: >> 1) Quickly fix a small mistake. >> >> v4 -> v5: >> 1) Drop potential support for Loongson 2K series SoC temporary, >> this part should be resend with the DT binding patch in the future. >> 2) Add per display pipe debugfs support to the builtin HDMI encoder. >> 3) Rewrite atomic_update() for hardware cursors plane(Thomas) >> 4) Rewrite encoder and connector initialization part, untangle it >> according to the chip(Thomas). >> >> v5 -> v6: >> 1) Remove stray code which didn't get used, say lsdc_of_get_reserved_ram >> 2) Fix all typos I could found, make sentences and code more readable >> 3) Untangle lsdc_hdmi*_connector_detect() function according to the pipe >> 4) After a serious consideration, we rename this driver as loongson. >> Because we also have drivers toward the LoongGPU IP in LS7A2000 and >> LS2K2000. Besides, there are also drivers about the external encoder, >> HDMI audio driver and vbios support etc. This patch only provide DC >> driver part, my teammate Li Yi believe that loongson will be more >> suitable for loongson graphics than lsdc in the long run. >> >> loongson.ko = LSDC + LoongGPU + encoders driver + vbios/DT ... >> >> v6 -> v7: >> 1) Add prime support, self-sharing is works. sharing buffer with etnaviv >> is also tested, and its works with limitation. >> 2) Implement buffer objects tracking with list_head. >> 3) S3(sleep to RAM) is tested on ls3a5000+ls7a2000 evb and it works. >> 4) Rewrite lsdc_bo_move, since ttm core stop allocating resources >> during BO creation. Patch V1 ~ V6 of this series no longer works >> on latest kernel. Thus, we send V7 to revival them. >> >> v7 -> v8: >> 1) Zero a compile warnnings on 32-bit platform, compile with W=1 >> 2) Revise lsdc_bo_gpu_offset() and minor cleanup >> 3) Pageflip tested on the virtual terminal with following commands >> >> modetest -M loongson -s 32:1920x1080 -v >> modetest -M loongson -s 34:1920x1080 -v -F tiles >> >> It works like a charm, when running pageflip test with dual screnn >> configuration, another two additional bo created by the modetest >> emerged, VRAM usage up to 40+MB, well we have at least 64MB, still >> enough. >> >> # cat bos >> >> bo[0000]: size: 8112kB VRAM >> bo[0001]: size: 16kB VRAM >> bo[0002]: size: 16kB VRAM >> bo[0003]: size: 16208kB VRAM >> bo[0004]: size: 8112kB VRAM >> bo[0005]: size: 8112kB VRAM >> >> v8 -> v9: >> 1) Select I2C and I2C_ALGOBIT in Kconfig and should depend on MMU. >> 2) Using pci_get_domain_bus_and_slot to get the GPU device. >> 3) Other minor improvements. >> >> Those patches are tested on ls3a5000 + ls7a1000 CRB, ls3a5000 + ls7a2000 >> evb, and lemote a1901 board(ls3a4000 + ls7a1000). On loongson mips CPU, >> the write combine support should be enabled, to get a decent performance >> for writing framebuffer data to the VRAM. >> >> v9 -> v10: >> 1) Revise lsdc_drm_freeze() to implement S3 completely and correctly. >> I suddenly realized that pinned buffer can not move and VRAM lost >> power when sleep to RAM. Thus, the data in the buffer who is pinned >> in VRAM will get lost when resume. Yet it's not big problem because >> we are software rendering solution which relay on the CPU update the >> front framebuffer. We can see the garbage data when resume from S3, >> but the screen will show correct image as I move the cursor. This is >> due to the cpu repaint. v10 of this patch make S3 perfect by unpin >> all of BOs in VRAM, evict them all to system RAM. >> >> v10 -> v11: >> 1) On double screen case, the single giant framebuffer is referenced by >> two GEM object, hence, it will be pinned by prepare_fb() at lease two >> times. This cause its pin count > 1. V10 of this patch only unpin VRAM >> BOs once when suspend, which is not correct on double screen case. V11 >> of this patch unpin BOs until its pin count reach to zero when suspend. >> Then, we make the S3 support complete finally. With v11, I can't see >> any garbage data after resume. Tested on both ls7a1000 and ls7a2000 >> platform, with single screen and double screen configuration. >> 2) Fix vblank wait timeout when disable CRTC. >> 3) Test against IGT, at least fbdev test and kms_flip test passed. >> 4) Rewrite pixel PLL update function, magic numbers eliminated (Emil) >> 5) Drop a few common hardware features description in lsdc_desc (Emil) >> 6) Drop lsdc_mode_config_mode_valid(), instead add restrictions in dumb >> create function. (Emil) >> 7) Untangle the ls7a1000 case and ls7a2000 case completely (Thomas) >> >> v11 -> v12: >> none >> >> v12 -> v13: >> 1) Add benchmark to figure out the bandwidth of the hardware platform. >> Usage: >> # cd /sys/kernel/debug/dri/0/ >> # cat benchmark >> >> 2) VRAM is filled with garbage data if uninitialized, add a buffer >> clearing procedure, clear it on the BO creation time. >> 3) Update copyrights and adjust coding style (Huacai) >> >> Signed-off-by: Li Yi <liyi@loongson.cn> >> Signed-off-by: Sui Jingfeng <suijingfeng@loongson.cn> >> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> >> Cc: Maxime Ripard <mripard@kernel.org> >> Cc: Thomas Zimmermann <tzimmermann@suse.de> >> Cc: David Airlie <airlied@gmail.com> >> Cc: Daniel Vetter <daniel@ffwll.ch> >> Cc: Sumit Semwal <sumit.semwal@linaro.org> >> Cc: "Christian König" <christian.koenig@amd.com> >> --- >> drivers/gpu/drm/Kconfig | 2 + >> drivers/gpu/drm/Makefile | 1 + >> drivers/gpu/drm/loongson/Kconfig | 17 + >> drivers/gpu/drm/loongson/Makefile | 21 + >> drivers/gpu/drm/loongson/ls7a1000_outputs.c | 161 +++ >> drivers/gpu/drm/loongson/ls7a2000_outputs.c | 531 +++++++++ >> drivers/gpu/drm/loongson/lsdc_benchmark.c | 132 +++ >> drivers/gpu/drm/loongson/lsdc_benchmark.h | 13 + >> drivers/gpu/drm/loongson/lsdc_crtc.c | 1068 +++++++++++++++++++ >> drivers/gpu/drm/loongson/lsdc_debugfs.c | 91 ++ >> drivers/gpu/drm/loongson/lsdc_device.c | 104 ++ >> drivers/gpu/drm/loongson/lsdc_drv.c | 484 +++++++++ >> drivers/gpu/drm/loongson/lsdc_drv.h | 452 ++++++++ >> drivers/gpu/drm/loongson/lsdc_gem.c | 324 ++++++ >> drivers/gpu/drm/loongson/lsdc_gem.h | 37 + >> drivers/gpu/drm/loongson/lsdc_gfxpll.c | 199 ++++ >> drivers/gpu/drm/loongson/lsdc_gfxpll.h | 52 + >> drivers/gpu/drm/loongson/lsdc_i2c.c | 179 ++++ >> drivers/gpu/drm/loongson/lsdc_i2c.h | 29 + >> drivers/gpu/drm/loongson/lsdc_irq.c | 81 ++ >> drivers/gpu/drm/loongson/lsdc_irq.h | 16 + >> drivers/gpu/drm/loongson/lsdc_output.h | 21 + >> drivers/gpu/drm/loongson/lsdc_pixpll.c | 481 +++++++++ >> drivers/gpu/drm/loongson/lsdc_pixpll.h | 86 ++ >> drivers/gpu/drm/loongson/lsdc_plane.c | 639 +++++++++++ >> drivers/gpu/drm/loongson/lsdc_probe.c | 56 + >> drivers/gpu/drm/loongson/lsdc_probe.h | 12 + >> drivers/gpu/drm/loongson/lsdc_regs.h | 400 +++++++ >> drivers/gpu/drm/loongson/lsdc_ttm.c | 610 +++++++++++ >> drivers/gpu/drm/loongson/lsdc_ttm.h | 99 ++ >> 30 files changed, 6398 insertions(+) >> create mode 100644 drivers/gpu/drm/loongson/Kconfig >> create mode 100644 drivers/gpu/drm/loongson/Makefile >> create mode 100644 drivers/gpu/drm/loongson/ls7a1000_outputs.c >> create mode 100644 drivers/gpu/drm/loongson/ls7a2000_outputs.c >> create mode 100644 drivers/gpu/drm/loongson/lsdc_benchmark.c >> create mode 100644 drivers/gpu/drm/loongson/lsdc_benchmark.h >> create mode 100644 drivers/gpu/drm/loongson/lsdc_crtc.c >> create mode 100644 drivers/gpu/drm/loongson/lsdc_debugfs.c >> create mode 100644 drivers/gpu/drm/loongson/lsdc_device.c >> create mode 100644 drivers/gpu/drm/loongson/lsdc_drv.c >> create mode 100644 drivers/gpu/drm/loongson/lsdc_drv.h >> create mode 100644 drivers/gpu/drm/loongson/lsdc_gem.c >> create mode 100644 drivers/gpu/drm/loongson/lsdc_gem.h >> create mode 100644 drivers/gpu/drm/loongson/lsdc_gfxpll.c >> create mode 100644 drivers/gpu/drm/loongson/lsdc_gfxpll.h >> create mode 100644 drivers/gpu/drm/loongson/lsdc_i2c.c >> create mode 100644 drivers/gpu/drm/loongson/lsdc_i2c.h >> create mode 100644 drivers/gpu/drm/loongson/lsdc_irq.c >> create mode 100644 drivers/gpu/drm/loongson/lsdc_irq.h >> create mode 100644 drivers/gpu/drm/loongson/lsdc_output.h >> create mode 100644 drivers/gpu/drm/loongson/lsdc_pixpll.c >> create mode 100644 drivers/gpu/drm/loongson/lsdc_pixpll.h >> create mode 100644 drivers/gpu/drm/loongson/lsdc_plane.c >> create mode 100644 drivers/gpu/drm/loongson/lsdc_probe.c >> create mode 100644 drivers/gpu/drm/loongson/lsdc_probe.h >> create mode 100644 drivers/gpu/drm/loongson/lsdc_regs.h >> create mode 100644 drivers/gpu/drm/loongson/lsdc_ttm.c >> create mode 100644 drivers/gpu/drm/loongson/lsdc_ttm.h
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