kc3-lang/SDL/src/video/kmsdrm_legacy/SDL_kmsdrm_legacy_sym.h

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• Hash : f8839289
  Author :
  Date : 2020-12-15T12:22:48
  

  Potential fix for bug 5393 - KMSDRM: using atomic mode setting breaks GPU compatibility
  
  Substring
  
  I was trying the KMSDRM video backend with some very simple programs that were working ok on 2.0.12. The same code won?t work on the current dev branch and I get:
  
  DEBUG: check_modesetting: probing ?/dev/dri/card0?
  DEBUG: /dev/dri/card0 connector, encoder and CRTC counts are: 4 5 6
  DEBUG: check_modesetting: probing ?/dev/dri/card0?
  DEBUG: /dev/dri/card0 connector, encoder and CRTC counts are: 4 5 6
  DEBUG: KMSDRM_VideoInit()
  DEBUG: Opening device /dev/dri/card0
  DEBUG: Opened DRM FD (3)
  DEBUG: no atomic modesetting support.
  DEBUG: Video subsystem has not been initialized
  INFO: Using SDL video driver: (null)
  DEBUG: Video subsystem has not been initialized
  
  After carefully checking, the radeon driver doesn?t support atomic modesetting. That?s not the only problem : the same happens with the amdgpu driver if we disable Display Core (kernel parameter amdgpu.dc=0, which is required to get analogue outputs working).
  
  This is a major regression in the KMSDRM driver.
  
  Using atomic mode setting is great, but having no fallback to the "standard KMS" is bad.
  

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• src/video/kmsdrm_legacy/SDL_kmsdrm_legacy_sym.h

• /*
    Simple DirectMedia Layer
    Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
  
    This software is provided 'as-is', without any express or implied
    warranty.  In no event will the authors be held liable for any damages
    arising from the use of this software.
  
    Permission is granted to anyone to use this software for any purpose,
    including commercial applications, and to alter it and redistribute it
    freely, subject to the following restrictions:
  
    1. The origin of this software must not be misrepresented; you must not
       claim that you wrote the original software. If you use this software
       in a product, an acknowledgment in the product documentation would be
       appreciated but is not required.
    2. Altered source versions must be plainly marked as such, and must not be
       misrepresented as being the original software.
    3. This notice may not be removed or altered from any source distribution.
  */
  
  /* *INDENT-OFF* */
  
  #ifndef SDL_KMSDRM_LEGACY_MODULE
  #define SDL_KMSDRM_LEGACY_MODULE(modname)
  #endif
  
  #ifndef SDL_KMSDRM_LEGACY_SYM
  #define SDL_KMSDRM_LEGACY_SYM(rc,fn,params)
  #endif
  
  #ifndef SDL_KMSDRM_LEGACY_SYM_CONST
  #define SDL_KMSDRM_LEGACY_SYM_CONST(type, name)
  #endif
  
  
  SDL_KMSDRM_LEGACY_MODULE(LIBDRM)
  SDL_KMSDRM_LEGACY_SYM(void,drmModeFreeResources,(drmModeResPtr ptr))
  SDL_KMSDRM_LEGACY_SYM(void,drmModeFreeFB,(drmModeFBPtr ptr))
  SDL_KMSDRM_LEGACY_SYM(void,drmModeFreeCrtc,(drmModeCrtcPtr ptr))
  SDL_KMSDRM_LEGACY_SYM(void,drmModeFreeConnector,(drmModeConnectorPtr ptr))
  SDL_KMSDRM_LEGACY_SYM(void,drmModeFreeEncoder,(drmModeEncoderPtr ptr))
  SDL_KMSDRM_LEGACY_SYM(drmModeResPtr,drmModeGetResources,(int fd))
  SDL_KMSDRM_LEGACY_SYM(int,drmModeAddFB,(int fd, uint32_t width, uint32_t height, uint8_t depth,
                                   uint8_t bpp, uint32_t pitch, uint32_t bo_handle,
                                   uint32_t *buf_id))
  SDL_KMSDRM_LEGACY_SYM(int,drmModeRmFB,(int fd, uint32_t bufferId))
  SDL_KMSDRM_LEGACY_SYM(drmModeFBPtr,drmModeGetFB,(int fd, uint32_t buf))
  SDL_KMSDRM_LEGACY_SYM(drmModeCrtcPtr,drmModeGetCrtc,(int fd, uint32_t crtcId))
  SDL_KMSDRM_LEGACY_SYM(int,drmModeSetCrtc,(int fd, uint32_t crtcId, uint32_t bufferId,
                                     uint32_t x, uint32_t y, uint32_t *connectors, int count,
                                     drmModeModeInfoPtr mode))
  SDL_KMSDRM_LEGACY_SYM(int,drmModeSetCursor,(int fd, uint32_t crtcId, uint32_t bo_handle,
                                       uint32_t width, uint32_t height))
  SDL_KMSDRM_LEGACY_SYM(int,drmModeSetCursor2,(int fd, uint32_t crtcId, uint32_t bo_handle,
                                        uint32_t width, uint32_t height,
                                        int32_t hot_x, int32_t hot_y))
  SDL_KMSDRM_LEGACY_SYM(int,drmModeMoveCursor,(int fd, uint32_t crtcId, int x, int y))
  SDL_KMSDRM_LEGACY_SYM(drmModeEncoderPtr,drmModeGetEncoder,(int fd, uint32_t encoder_id))
  SDL_KMSDRM_LEGACY_SYM(drmModeConnectorPtr,drmModeGetConnector,(int fd, uint32_t connector_id))
  SDL_KMSDRM_LEGACY_SYM(int,drmHandleEvent,(int fd,drmEventContextPtr evctx))
  SDL_KMSDRM_LEGACY_SYM(int,drmModePageFlip,(int fd, uint32_t crtc_id, uint32_t fb_id,
                                      uint32_t flags, void *user_data))
  
  
  SDL_KMSDRM_LEGACY_MODULE(GBM)
  SDL_KMSDRM_LEGACY_SYM(int,gbm_device_get_fd,(struct gbm_device *gbm))
  SDL_KMSDRM_LEGACY_SYM(int,gbm_device_is_format_supported,(struct gbm_device *gbm,
                                                     uint32_t format, uint32_t usage))
  SDL_KMSDRM_LEGACY_SYM(void,gbm_device_destroy,(struct gbm_device *gbm))
  SDL_KMSDRM_LEGACY_SYM(struct gbm_device *,gbm_create_device,(int fd))
  SDL_KMSDRM_LEGACY_SYM(unsigned int,gbm_bo_get_width,(struct gbm_bo *bo))
  SDL_KMSDRM_LEGACY_SYM(unsigned int,gbm_bo_get_height,(struct gbm_bo *bo))
  SDL_KMSDRM_LEGACY_SYM(uint32_t,gbm_bo_get_stride,(struct gbm_bo *bo))
  SDL_KMSDRM_LEGACY_SYM(union gbm_bo_handle,gbm_bo_get_handle,(struct gbm_bo *bo))
  SDL_KMSDRM_LEGACY_SYM(int,gbm_bo_write,(struct gbm_bo *bo, const void *buf, size_t count))
  SDL_KMSDRM_LEGACY_SYM(struct gbm_device *,gbm_bo_get_device,(struct gbm_bo *bo))
  SDL_KMSDRM_LEGACY_SYM(void,gbm_bo_set_user_data,(struct gbm_bo *bo, void *data,
                                            void (*destroy_user_data)(struct gbm_bo *, void *)))
  SDL_KMSDRM_LEGACY_SYM(void *,gbm_bo_get_user_data,(struct gbm_bo *bo))
  SDL_KMSDRM_LEGACY_SYM(void,gbm_bo_destroy,(struct gbm_bo *bo))
  SDL_KMSDRM_LEGACY_SYM(struct gbm_bo *,gbm_bo_create,(struct gbm_device *gbm,
                                                uint32_t width, uint32_t height,
                                                uint32_t format, uint32_t usage))
  SDL_KMSDRM_LEGACY_SYM(struct gbm_surface *,gbm_surface_create,(struct gbm_device *gbm,
                                                          uint32_t width, uint32_t height,
                                                          uint32_t format, uint32_t flags))
  SDL_KMSDRM_LEGACY_SYM(void,gbm_surface_destroy,(struct gbm_surface *surf))
  SDL_KMSDRM_LEGACY_SYM(struct gbm_bo *,gbm_surface_lock_front_buffer,(struct gbm_surface *surf))
  SDL_KMSDRM_LEGACY_SYM(void,gbm_surface_release_buffer,(struct gbm_surface *surf, struct gbm_bo *bo))
  
  
  #undef SDL_KMSDRM_LEGACY_MODULE
  #undef SDL_KMSDRM_LEGACY_SYM
  #undef SDL_KMSDRM_LEGACY_SYM_CONST
  
  /* *INDENT-ON* */
  
  /* vi: set ts=4 sw=4 expandtab: */
  

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