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kmsdrm: Restore atomic support.

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This commit is contained in:
Ryan C. Gordon
2024-11-20 20:05:54 -05:00
parent e4c60c05bf
commit 1fe926769c
7 changed files with 1109 additions and 82 deletions
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22
include/SDL3/SDL_hints.h
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@@ -2473,6 +2473,28 @@ extern "C" {
*/
#define SDL_HINT_KMSDRM_REQUIRE_DRM_MASTER "SDL_KMSDRM_REQUIRE_DRM_MASTER"
/**
* A variable that controls whether KMSDRM will use "atomic" functionality.
*
* The KMSDRM backend can use atomic commits, if both DRM_CLIENT_CAP_ATOMIC
* and DRM_CLIENT_CAP_UNIVERSAL_PLANES is supported by the system. As of
* SDL 3.4.0, it will favor this functionality, but in case this doesn't
* work well on a given system or other surprises, this hint can be used
* to disable it.
*
* This hint can not enable the functionality if it isn't available.
*
* The variable can be set to the following values:
*
* - "0": SDL will not use the KMSDRM "atomic" functionality.
* - "1": SDL will allow usage of the KMSDRM "atomic" functionality. (default)
*
* This hint should be set before SDL is initialized.
*
* \since This hint is available since SDL 3.4.0.
*/
#define SDL_HINT_KMSDRM_ATOMIC "SDL_KMSDRM_ATOMIC"
/**
* A variable controlling the default SDL log levels.
*