src/video/kmsdrm/SDL_kmsdrmvideo.c


Log

Author Commit Date CI Message
Manuel Alfayate Corchete 2756b0f3 2020-12-20T14:29:58 [Video/KMSDRM] Init and deinit mouse stuff at the same time that GBM stuff.
Manuel Alfayate Corchete cf71e017 2020-12-19T23:32:09 [Video/KMSDRM] Remove auxiliary AMDGPU compatibility workarounds not needed anymore.
Manuel Alfayate Corchete ab3a390e 2020-12-19T17:35:04 [Video/KMSDRM] Better ATOMIC caps testing: patch by Oskan Sezer.
Manuel Alfayate Corchete 436499f3 2020-12-19T02:08:59 [Video/KMSDRM] Comment out some debug info, adjust comments for future work.
Ozkan Sezer 6b81cac4 2020-12-19T01:25:50 remove duplicated SDL_SetError after calling check_atomic_modesetting()
Manuel Alfayate Corchete 8952a613 2020-12-18T23:17:42 [Video/KMSDRM] Re-arrange display members setup.
Manuel Alfayate Corchete f60f8d5d 2020-12-18T22:53:51 [Video/KMSDRM]: Add Vulkan support to the KMSDRM backend.
Ozkan Sezer 6c4ab484 2020-12-18T17:50:02 SDL_kmsdrmvideo.c: check atomic modesetting in check_modesetting() .. so that KMSDRM_CreateDevice() can fail and SDL_VideoInit() would move on to next bootstrap member which is kmsdrm_legacy. hopefully fixes bug #5393.
Ozkan Sezer 90456670 2020-12-17T14:11:00 more "'for' loop initial declarations are only allowed in C99 mode" fixes
Ryan C. Gordon 010d5fba 2020-10-26T09:49:09 kmsdrm: Make this build with significantly older system libraries. This allows one to build Raspberry Pi versions on an ancient version of Raspbian and get both the KMSDRM and RPI video targets built into SDL, giving maximum binary compatibility from linking against an older glibc, etc, but also making one library that can access video on all RPi models and OS releases.
Manuel Alfayate Corchete 5682b066 2020-10-22T19:51:57 kmsdrm: Add comment about KMSDRM_VideoQuit() changes.
Manuel Alfayate Corchete 63b78277 2020-10-22T19:44:38 kmsdrm: properly exit with an error when ATOMIC interface is not yet available, instead of just segfaulting.
Manuel Alfayate Corchete a3262205 2020-10-22T17:55:45 kmsdrm: rearrange init function so we try ATOMIC compatibility first.
Manuel Alfayate Corchete b1ea0be8 2020-10-22T17:06:34 kmsdrm: Add missing checks after SDL_calloc() calls.
Manuel Alfayate Corchete ad9ec8b3 2020-10-22T16:15:34 kmsdrm: Small fix, missing bracket.
Manuel Alfayate Corchete 87a86675 2020-10-22T16:01:51 kmsdrm: Always use spaces for indentation. Always use SDL_calloc() for calloc.
Manuel Alfayate Corchete cca16c9c 2020-10-15T17:56:19 kmsdrm: merge GetDisplayDPI implementation by bms20 <brett@mynah-software.com>
Sam Lantinga 76980e30 2020-10-08T16:42:20 Added events for dynamically connecting and disconnecting displays, with an iOS implementation
Manuel Alfayate Corchete 78c274cb 2020-09-26T19:18:09 kmsdrm: merge patches from Ozkan Sezer for removing c-99'isms and raising libgbm version reqeriments.
Manuel Alfayate Corchete 9c342e76 2020-09-13T21:41:10 kmsdrm: merge heap buffer overflow and cursor creation patches from meyraud705.
Manuel Alfayate Corchete 0cb9bfa5 2020-09-12T15:58:47 kmsdrm: less excessive error checkhing
Manuel Alfayate Corchete 9e9227ad 2020-09-12T04:52:56 kmsdrm: reimplement modesetting for fullscreen window scaling and AR-correction.
Manuel Alfayate Corchete 01b0cf1c 2020-09-12T00:47:00 Backed out changeset 4a45d1a30d25 kmsdrm: Fake KMSDRM_SetDisplayMode() is needed for some programs after all.
Manuel Alfayate Corchete 7b676548 2020-09-12T00:16:08 kmsdrm: don't fool SDL into thinking that changing the physical videomode is done.
Ryan C. Gordon 3c6004fe 2020-09-10T15:07:23 kmsdrm: Choose how to swap buffers based on EGL extension availability.
Ryan C. Gordon 224aa45b 2020-09-10T15:04:35 kmsdrm: Implement GL_DefaultProfileConfig for Raspberry Pi compatibility. If we think this might be a Raspberry Pi device, default to ES2. Otherwise, accept SDL's higher-level defaults.
Manuel Alfayate Corchete 351219bf 2020-09-09T03:18:26 kmsdrm: On VideoQuit(), only destroy dumb buffer if it exists.
Manuel Alfayate Corchete 244d0ad8 2020-09-08T15:30:45 kmsdrm: Tell SDL that mouse has entered the window via artificial event. Fixes sticky mouse in Scummvm.
Manuel Alfayate Corchete 550e1533 2020-09-08T02:42:32 kmsdrm: No need to test for display driverdata when freeing a plane.
Manuel Alfayate Corchete 6e03fab9 2020-09-07T23:15:33 kmsdrm: add temporary RPI4_COMPAT define to try RPI4+current Rasbian compatibility.
Manuel Alfayate Corchete 0f807fd6 2020-09-07T22:54:15 kmsdrm: use a black dumb buffer for keeping the PRIMARY PLANE occupied when we destroy the KMS buffers, instead of using the TTY buffer, to avoid flickering.
Manuel Alfayate Corchete cce6c605 2020-09-07T01:33:04 kmsdrm: fix errors when trying to free up videomode driverdata pointers on quit.
Manuel Alfayate Corchete 9501b1c6 2020-09-07T00:18:13 kmsdrm: fix scaling for SDL_WINDOW_FULLSCREEN windows.
Manuel Alfayate Corchete daa752b1 2020-09-06T23:19:54 kmsdrm: fix first frame display: no need to wait for SwapWindow() for EGL surface creation.
Manuel Alfayate Corchete 68ac9349 2020-09-06T12:48:39 kmsdrm: more coherent returns for SwapWindow.
Manuel Alfayate Corchete d7aebbd5 2020-09-06T12:08:22 kmsdrm: Don't create surfaces until EGL context is available.
Manuel Alfayate Corchete f4e02a5c 2020-08-31T19:17:17 kmsdrm: Do NOT modify window size manually from the backend: doing so caused renderer scaling params miscalculation.
Manuel Alfayate Corchete c09d1cee 2020-08-28T23:04:00 kmsdrm: Apply window reconfiguration in SetWindowSize(), too.
Manuel Alfayate Corchete 31b17945 2020-08-28T22:38:26 kmsdrm: use PLANE and CRTC to do hardware-driven window scaling and AR-correction.
Manuel Alfayate Corchete fe3f9796 2020-08-26T01:37:30 kmsdrm: unload EGL and GL lib only if using them.
Manuel Alfayate Corchete 9b43464d 2020-08-25T16:30:23 kmsdrm: Add programmer credits to the Atomic KMSDRM driver.
Manuel Alfayate Corchete 9316a8d9 2020-08-25T16:18:49 kmsdrm: move FENCE FD props setting to SwapWindow(), where it belongs.
Manuel Alfayate Corchete 3f38009b 2020-08-25T15:40:36 kmsdrm: comment out atomic commit fast-debugging printf.
Manuel Alfayate Corchete 0d16761c 2020-08-25T05:53:13 kmsdrm: fix segfault on quit beacuse of freed _this->egl_data.
Manuel Alfayate Corchete d43e666e 2020-08-25T04:05:36 kmsdrm: Buffer management refactoring. Fixes for compatibility with more video drivers.
Manuel Alfayate Corchete eade05ca 2020-08-24T12:51:20 kmsdrm: Finetune integer type usage. Add some comments.
Manuel Alfayate Corchete 0d593d7e 2020-08-23T23:44:07 kmsdrm: Add error control to plane prop setting function. Do most plane prop setting with a single function.
Manuel Alfayate Corchete e06e9c35 2020-08-23T11:26:55 kmsdrm: move cursor-related atomic helper functions and related struct typedefs to the SDL_kmsdrmmouse unit.
Manuel Alfayate Corchete 0b7b7721 2020-08-23T03:13:50 kmsdrm: remove redundant function, use drm_atomic_setbuffers() for disconnecting planes instead.
Manuel Alfayate Corchete 16c04f26 2020-08-23T02:58:57 kmsdrm: Init cursor surface on SetCursor() ONLY. Removal of dynamic modeset because it causes A LOT of problems with some kernel video drivers. Some refactoring and cleanups.
Manuel Alfayate Corchete 5d32eda9 2020-08-19T01:31:22 kmsdrm: implement smarter surface recreation function to be used in videomode changes. Other minor arrangements.
Manuel Alfayate Corchete f79da817 2020-08-18T01:52:15 kmsdrm: free all connector, crtc and plane memory on KMSDRM_VideoQuit().
Manuel Alfayate Corchete 92cb9192 2020-08-17T18:35:04 kmsdrm: move hardware cursor functionality to the ATOMIC interface. Disconnect the display plane from the GBM surface buffers before destroying the GBM surface.
Manuel Alfayate Corchete c437729b 2020-08-08T14:27:55 kmsdrm: separate requests in different functions so we only need one atomic commit for everything, as expected by atomic design.
Manuel Alfayate Corchete 3b9f1073 2020-08-07T11:53:04 kmsdrm: wait for possible pending atomic commits before destroying surfaces, and before restoring video on quit. Move messages to the SDL_Log* functions.
Manuel Alfayate Corchete 96c99693 2020-08-06T01:36:56 kmsdrm: wait for pending atomic commits before restoring videomode and crtc->buffer on VideoQuit, and simplify double-buffer SwapWindow() implementation.
Manuel Alfayate Corchete 09692b61 2020-08-05T18:55:22 kmsdrm: move videomode restoration on VideoQuit() to using the atomic interface instead of the legacy drmModeSetCrtc() function. Refactoring of get_plane_id().
Manuel Alfayate Corchete fc722b2d 2020-08-05T15:28:51 kmsdrm: free memory for plane, crtc and connector property tables on VideoQuit.
Manuel Alfayate Corchete 2d69ce08 2020-08-05T02:06:59 kmsdrm: double and triple buffered versions of SwapWindow() are now both reimplemented in atomic pageflipping versions, and can be selected via SDL_VIDEO_DOUBLE_BUFFER env variable.
Manuel Alfayate Corchete 8996ee17 2020-08-03T22:24:49 kmsdrm: update SwapWindow fn, moving it to triple-buffer.
Manuel Alfayate Corchete 1a5503ce 2020-07-28T21:11:25 kmsdrm: Moved to the ATOMIC KMS/DRM interface for buffer swapping, leaving DRM-legacy behind.
RALOVICH, Kristof c7eb557d 2020-07-20T10:09:07 kmsdrm: do not leak drmModeConnector Previously conn was leaked on the success path (when available was set to SDL_TRUE).
Manuel Alfayate Corchete 412b21b0 2020-07-20T11:42:23 Rename the gbm device struct from gbm to gbm_dev for better readabilty.
RALOVICH, Kristof 155fdc7a 2020-07-19T21:48:17 kmsdrm: settle with first card that has a connected connector Previously the first card with non-empty connectors, encoders and crtcs would be selected, however KMSDRM_VideoInit could still reject it if the connector was not connected. This allow finding the first card (in a multi GPU setup) that is actually connected to a display.
RALOVICH, Kristof b78b88f7 2020-07-19T21:46:41 kmsdrm: fix typo
Manuel Alfayate Corchete 75fe4b14 2020-07-19T19:53:57 Added comment about window creation behaviour in KMSDRM.
Manuel Alfayate Corchete 2f660c4f 2020-07-19T19:11:02 Delete windata variable no longer needed in KMSDR_SetDisplayMode().
Manuel Alfayate Corchete 3a1d7d9c 2020-07-19T19:09:15 Surfaces have to be recreated immediately from KMSDRM_SetDisplayMode().
Manuel Alfayate Corchete b6a818b6 2020-07-19T18:45:29 Fix SDL_Window recreation: drmModeSetCrtc() has to be called everytime the EGL and GBM surfaces are recreated.
M Stoeckl 052a1373 2020-07-12T19:11:15 Merge VideoBootStrap::available into VideoBootStrap::create The two are only ever called together, and combining them makes it possible to eliminate redundant symbol loading and redundant attempts to connect to a display server.
Sam Lantinga b9f55b6d 2020-06-19T10:37:14 Fixed bug 5199 - Fix KMSDRM_CreateWindow() segfault when starting L?VE2D engine. Manuel Alfayate Corchete This small patch fixes the KMSDRM_CreateSurfaces() call in KMSDRM_CreateWindow(), that was segfaulting deeper into SDL internals because the windata->viddata pointer wasn't set before the KMSDRM_CreateSurfaces() call. So that's what this small patch does. Now, L?VE2D works perfectly well on the Raspberry Pi 3, instead of just segfaulting.
Sam Lantinga d48c97c4 2020-06-02T16:57:20 Fixed bug 5147 - KMSDRM: SetWindowFullscreen() failing with SDL_WINDOW_FULLSCREEN_DESKTOP Manuel Alfayate Corchete This patch is needed so programs that do this work as expected: 1) Start in a different video mode than the mode used by the system and then... 2) Try to go fullscreen with the mode originally used by the system via SetWindowFullScreen() with the SDL_WINDOW_FULLSCREEN_DESKTOP flag. An example would be pt2-clone in https://github.com/8bitbubsy/pt2-clone. This program does this: Starts with: video.window = SDL_CreateWindow("", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, screenW, screenH, windowFlags); and then, *IF* the user has configured it in fullscreen mode in its .ini, it tries to go fullscreen with the desktop mode: SDL_SetWindowFullscreen(video.window, SDL_WINDOW_FULLSCREEN_DESKTOP); This sequence of operations is currently failing because SDL_SetDisplayModeForDisplay() in SDL_video.c fails because display->desktop_mode is not being initialized with its correct value: SetDisplayMode() in SDL_kmsdrmvideo.c will not be able to set the mode because it detects the mode to have a driverdata of 0x0 ("if (!modedata)") and rightfully returns an error. So, the included patch fixes this small problem, and programs that first change the video mode and then try to go fullscreen with the system video mode will now work. The patch simply fixes an small omission, but its really needed now that dynamic video mode changing was implemented on the KMSDRM backend.
Sam Lantinga 1df0a1e4 2020-05-26T16:27:00 Fixed bug 5140 - KMSDRM: Dynamic vsync toggle does not work Manuel Alfayate Corchete The KMSDRM backend was doing things wrong because of some small (but important) misconceptions on how KMS/DRM works: to implement a largely broken non-vsync refresh mechanism, the SwapWindow() function was issuing new pageflips before previous ones had completed, thus causing EBUSY returns, buffer mismanagement, etc... resulting in general breakage on vsync disabling from apps, that would not allow vsync to work again without KMSDRM video re-initialization. To further clarify, on most DRM drivers async pageflips are NOT working nowadays, so all issued pageflips will complete on next VBLANK, NOT ASAP (calling drmModePageFlip() with the DRM_MODE_PAGE_FLIP_ASYNC flag will return error). The old code was assuming that can just issue a synchronous (=on VBLANK) pageflip and then pass a 0 timeout to the pull() function so we do not wait for the pageflip event, thinking that this will lead to correct non-vsynced screen updates from the program: That is plain wrong. Each pageflip has to be waite before issuing a new one, ALWAYS. And if we do not support ASYNC pageflips on the DRM driver level, then we are forced to wait for the next VBLANK. There is no way around it. I have also added many comments on the KMSDRM code. This is needed for future reference for me or others who may need to look at this code: KMS/DRM terminology regarding what SYNC and ASYNC mean in pageflip terms, and where to do certain things and why, is not trivial. It is not desirable or possible to invest time on researching the same concepts every time there is need to dive into this code. So please leave all these comments in the patch.
Sam Lantinga b6afbe63 2020-04-07T09:38:57 Added SDL_log.h to SDL_internal.h so logging is available everywhere
Fabrice Fontaine 9354aea1 2020-03-25T09:38:45 src/video/kmsdrm/SDL_kmsdrmvideo.c: fix build Build is broken without EGL since version 2.0.12 and https://hg.libsdl.org/SDL/rev/72cc4740dec2: /home/giuliobenetti/autobuild/run/instance-1/output-1/build/sdl2-2.0.12/src/video/kmsdrm/SDL_kmsdrmvideo.c: In function 'KMSDRM_CreateSurfaces': /home/giuliobenetti/autobuild/run/instance-1/output-1/build/sdl2-2.0.12/src/video/kmsdrm/SDL_kmsdrmvideo.c:394:5: error: unknown type name 'EGLContext' EGLContext egl_context; ^ Fixes: - http://autobuild.buildroot.org/results/fafd20a01591032662f9ca025fcea3478239cf3c Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Sam Lantinga 82be6dd7 2020-03-07T08:48:04 Fixed regression in bug 4966 - KMSDRM: Add dynamic modeset support Anthony Pesch I was just communicating with one of the Retropie developers regarding this. This change removed the forced window focus change on creation (https://github.com/inolen/SDL-mirror/commit/3534cb3793f4744509f020f1267f510ec7099366) as part of the change no longer assumes there's only a single window being created. This was perhaps an over-aggressive removal. Due to that change, joystick events are only received if SDL_SetKeyboardFocus is called explicitly, or if the app has specified SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS. I think that part of my change should be reverted to continue setting mouse / keyboard focus to the window being created. If SDL_WINDOW_INPUT_FOCUS is to be used as an input flag the code could be conditional, but that would still leave existing software broken.
Sam Lantinga a19757ac 2020-03-02T14:55:40 Fixed bug 5007 - Segfault in KMSDRM_VideoQuit() on Raspberry Pi Zero with no display attached Charles Huber This patch fixes the segfault on my Pi, though the valid display index range reported by the CHECK_DISPLAY_INDEX() macro in src/video/SDL_video.c is a little weird: $ SDL_VIDEO_EGL_DRIVER=libEGL.so SDL_VIDEO_GL_DRIVER=libGLESv2.so ./a.out SDL_Init(): displayIndex must be in the range 0 - -1
Sam Lantinga 9013c916 2020-02-27T08:20:34 Fixed bug 5005 - warnings in kmsdrm Malte Kie?ling At the moment i get following warnings from kmsdrm: * in SDL_kmsdrmvideo.c KMSDRM_DestroySurfaces is return type int, but thats never returned or checked against * in SDL_kmsdrmvideo.c KMSDRM_DestroySurfaces the variable viddata is not used * in SDL_kmsdrmopengles.c KMSDRM_GLES_LoadLibrary a cast to NativeDisplayType is missing I attached a patch for them :)
Sam Lantinga 35704c98 2020-02-14T16:17:17 Fixed bug 4980 - Build fails for SDL_kmsdrm*.c Malte Kie?ling Since https://hg.libsdl.org/SDL/rev/f908bd722523 / bug 4966 i cannot build SDL anymore. The error i get is, essentially, caused by -Werror=declaration-after-statement in SDL_kmsdrmvideo.c and SDL_kmsdrmopengles.c
Sam Lantinga 3e935aec 2020-02-09T11:44:22 Fixed bug 4966 - KMSDRM: Add dynamic modeset support Anthony Pesch * Remove triple buffering support. As far as I can tell, this goes against the libdrm API; the EGL implementations themselves control the buffering. Removing it isn't absolutely necessary as it seemingly works on the Pi at least, but I noticed this while doing my work and explained my reasoning in the commit. * Replace the crtc_ready logic which allocates an extra bo to perform the initial CRTC configuration (which is required before calling drmModePageFlip) with a call to drmModeSetCrtc after the front and back buffers are allocated, avoiding this allocation. * Standardized the SDL_*Data variable names and null checks to improve readability. Given that there were duplicate fields in each SDL_*Data structure, having generic names such as "data" at times was very confusing. * Removed unused fields from the SDL_*Data structures and moves all display related fields out of SDL_VideoData and into SDL_DisplayData. Not required since the code only supports a single display right now, but this was helpful in reading and understanding the code initially. * Implement KMSDRM_GetDisplayModes / KMSDRM_SetDisplayMode to provide dynamic modeset support. These changes have been tested on a Raspberry Pi 4 and a Dell XPS laptop with an HD 520. As an update, I went back over the triple buffer changes and left them in. I didn't entirely get the code originally, I had just seen it calling KMSDRM_gbm_surface_lock_front_buffer twice for a single swap and had removed it because I was paranoid of bugs stemming from it while working on the modeset changes. I've made a few small changes to the logic that had thrown me off originally and rebased the changes: * The condition wrapping the call to release buffer was incorrect. * The first call to KMSDRM_gbm_surface_lock_front_buffer has been removed. I don't understand why it existed. * Added additional comments describing what was going on in the code (as it does fix the buffer release pattern of the original code before it).
Sam Lantinga a8780c6a 2020-01-16T20:49:25 Updated copyright date for 2020
Sam Lantinga bd952900 2019-06-19T06:40:50 Use SDL C runtime functions
Sylvain Becker faed7f83 2019-06-19T10:11:38 KMSDRM: fix inverted strcmp, remove useless if test (Bug 4624)
Sylvain Becker 5998c513 2019-06-19T09:16:53 KMSDRM: fix compilation on linux, no d_namlen (Bug 4624)
Sam Lantinga 99abcbb2 2019-06-18T14:15:10 Fixed bug 4624 - KMS/DRM fails on FreeBSD because /dev/dri/card* nodes are symlinks Jan Martin Mikkelsen Patch to scan /dev/dri based on names rather than file type Loading KMS/DRM on FreeBSD fails because the "available" code in the driver checks for character device nodes under /dev/dri and the /dev/dri/card* files are symlinks rather than device nodes nodes on FreeBSD. The symlink points to /dev/drm/0. The attached patch counts /dev/dri/card* entries rather than directory entries which are character devices.
Sylvain Becker cbe80d47 2019-03-13T14:54:51 KMSDRM: valid file descriptors could positive or 0. -1 is invalid. (Bug 4530)
Sylvain Becker 7b275942 2019-03-11T15:27:42 KMSDRM: missing return value in VideoInit() (Bug 4530)
Sylvain Becker 3b49ee52 2019-03-11T15:22:40 KMSDRM: change calls free() to SDL_free() (Bug 4529)
Sam Lantinga 5e13087b 2019-01-04T22:01:14 Updated copyright for 2019
Sergey Zhuravlevich 583f61b2 2018-12-01T16:31:56 kmsdrm: Check for resources when validating KMSDRM device in check_modesetting. Fixes Bugzilla #4403.
Sergey Zhuravlevich b3ac87d5 2018-12-01T13:09:00 kmsdrm: uninitialized KMSDRM fixes * Search for valid encoder in connector when it doesn't have an encoder ID set. * Search for valid CRTC in resources and encoder's possible CRTCs when encoder doesn't have one set. * Select default mode if CRTC doesn't have a valid one. * Pick current_mode's W/H/Refresh Rate basing on current and valid CRTC mode, not the saved one.
Sam Lantinga aeee424f 2018-10-31T15:16:51 Fixed bug 4349 - SDL_CreateWindow fails with KMS/DRM after upgrading Mesa to 18.2.3 Rainer Sabelka After I did an upgrade of my arch Linux installation (resulting in an update of Mesa to version 18.2.3), all my SDL2 applications which use the KMS/DRM driver stopped working. Reason: Creating a Window with SDL_CreateWindow failed because the call to EGL eglCreateWindowSurface() returns an error "EGL_BAD_MATCH". After investigating with the debugger I figured, that the configuration, which has been selected from the output of eglChooseConfig(), has an "EGL_NATIVE_VISUAL_ID" which does not match the "format" of the underlying gbm surface. The attached patch fixes the problem. It does so, by mimicking Weston's behavior. All configurations returned from eglChooseConfig() which have an visual_id different from the gbm format are discarded, and only from the remaining ones the "best" match is selected.
Ryan C. Gordon 88b32525 2018-10-09T00:27:55 kmsdrm: find available card if called without index. This work was done by Michael Grzeschik, I just cleaned up the patch a little. Fixes Bugzilla #4241.
Sam Lantinga 3ac9e2aa 2018-10-05T17:06:05 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.
Sam Lantinga e3cc5b2c 2018-01-03T10:03:25 Updated copyright for 2018
Sam Lantinga 8758b7bf 2017-11-24T12:03:28 Fixed bug 3980 - Fix for KMSDRM driver where cursor would not be shown on some gfx hardware because of unsupported cursor size Manuel Alfayate Corchete This fixes a problem with KMSDRM on some graphics hardware where only bigger cursor sizes are supported, such as current Intel gfx. (The kernel-side driver is what limits this: had to look for failing IOCTLs...) That caused SDL_SetCursor() to fail silently, and we were left with a missing cursor without further explanation. With this patch, different "standard" sizes are tried and a bigger one is used (with an intermediate and clean buffer only used to write the new cursor to the BO where it will live after) if we get, let's say, 16x16 which is pretty common but our hardware does not support that.
Brandon Schaefer 9f4e4be8 2017-11-07T09:10:32 Fixed bug 3943 - General SDL_HINT_VIDEO_DOUBLE_BUFFER hint support
Brandon Schaefer 2ac567b7 2017-10-26T16:37:20 Fixed bug 3902 - Add a specific KMSDRM hint for low latency video
Sam Lantinga 10376eb9 2017-10-21T04:20:57 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).
Sam Lantinga c26946e9 2017-09-01T12:54:38 Fixed bug 3792 - [KMS/DRM] Wrong GBM format Romain Tisserand Using KMS/DRM driver from WIP SDL2.0.6 on Linux/ARM SoC RockChip RK3328 (ARM Mali 450 MP2 GPU). The current code is using GBM_BO_FORMAT_XRGB8888 as GBM buffer format specifier. The Mali driver (it has been confirmed some other vendor implementations too) expects GBM_FORMAT_XRGB8888. The Mesa implementation is actually handling both values as the same, but it's not implemented like this into every gbm.h vendor header. https://github.com/ideak/mesa/blob/master/src/gbm/backends/dri/gbm_dri.c So with stock SDL2 on my card (Mali vendor implementation), it does not work, eglCreateWindowSurface fails, and gbm_is_format_supported fails too (with the BO variant). It runs fine with GBM_FORMAT_XRGB8888. Here is a link of the gbm.h from Mali user-space driver : https://github.com/rockchip-linux/libmali/blob/rockchip/include/gbm.h