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2d37d291
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2019-09-06T08:44:46
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KMSDRM_GLES_SwapWindow: fix non-vsync case
If KMSDRM_drmModeSetCrtc is called when the swap interval is
set to 0, the driver behaves as though vertical sync is engaged by
limiting framerate to the refresh rate, but performance is much worse
than with vertical sync enabled.
Resolve this issue by ensuring that the Crtc is only set up once,
and KMSDRM_drmModePageFlip is called, albeit without any followup
queueing or waiting for flips.
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5e13087b
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2019-01-04T22:01:14
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Updated copyright for 2019
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3ac9e2aa
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2018-10-05T17:06:05
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Fixed bug 4296 - kmsdrm video driver leaks 1 bo in KMSDRM_GLES_SetupCrtc()
Icenowy Zheng
One front buffer is locked in GLES_SetupCrtc() and overrides the next_bo just locked in KMSDRM_GLES_SwapWindow, then the next_bo gets lost and is not released even when quitting the video.
It may leads to problems with GLES drivers that doesn't clean up GBM correctly if there's any bo left (e.g. the Mali Utgard r6p2 blob). In the case of Mali Utgard r6p2 blob, the DRM device file is still hold by the blob, and if you try to SDL_Quit to let another program to run (this is done by EmulationStation), the new program will fail to open DRM device.
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5febdfce
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2018-09-24T11:49:25
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Fixed whitespace
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e3cc5b2c
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2018-01-03T10:03:25
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Updated copyright for 2018
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2ac567b7
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2017-10-26T16:37:20
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Fixed bug 3902 - Add a specific KMSDRM hint for low latency video
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10376eb9
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2017-10-21T04:20:57
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Fixed bug 3901 - Fix vsync-ed pageflips on the KMSDRM video driver
Manuel
I noticed that, at least on Intel GPU hardware, passing SDL_RENDERER_PRESENTVSYNC would result on a static console instead of the program graphics.
That was due to the fact that calling drmModePageFlip() only works if we have previously set up CRTC to one of the GBM buffers with a drmModeSetCrtc() call, so now it's done and things work as expected.
The KMSDRM_GLES_SetupCrtc() call is done only one time, only when needed (when egl_swapinterval is not 0: when it's 0, there's no need for it because we flip by calling drmModePageFlip() anyway).
The place where KMSDRM_GLES_SetupCrtc() call is done may look strange, but it's right: it needs EGL completely ready because it needs to call eglSwapBuffers() internally to work (see more comments about it in the code).
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11717184
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2017-08-21T17:20:50
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kmsdrm: Cleanup unused headers, rename SDL_kmsdrmevents_c.h -> SDL_kmsdrmevents.h
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f216b446
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2017-08-05T22:10:36
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kmsdrm: Fixed crashes if allocating memory failed.
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86e95a60
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2017-08-02T17:45:15
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kmsdrm: Fix tearing in neverputt/ball
https://gfycat.com/FatalFarawayHeron
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56363ebf
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2017-08-02T10:22:48
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Fixed bug 3690 - SDL2 KMS/DRM render context support
Manuel
The attached patch adds support for KMS/DRM context graphics.
It builds with no problem on X86_64 GNU/Linux systems, provided the needed libraries are present, and on ARM GNU/Linux systems that have KMS/DRM support and a GLES2 implementation.
Tested on Raspberry Pi: KMS/DRM is what the Raspberry Pi will use as default in the near future, once the propietary DispmanX API by Broadcom is overtaken by open graphics stack, it's possible to boot current Raspbian system in KMS mode by adding "dtoverlay=vc4-kms-v3d" to config.txt on Raspbian's boot partition.
X86 systems use KMS right away in every current GNU/Linux system.
Simple build instructions:
$./autogen.sh
$./configure --enable-video-kmsdrm
$make
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