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[Video/KMSDRM] Comment out some debug info, adjust comments for future work.

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This commit is contained in:
Manuel Alfayate Corchete 2020-12-19 02:08:59 +01:00
parent 6b81cac420
commit 436499f3ec
2 changed files with 11 additions and 7 deletions
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2
src/video/kmsdrm/SDL_kmsdrmvideo.c
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@ -682,7 +682,9 @@ int drm_atomic_commit(_THIS, SDL_bool blocking)
if (ret) {
SDL_SetError("Atomic commit failed, returned %d.", ret);
/* Uncomment this for fast-debugging */
#if 0
printf("ATOMIC COMMIT FAILED: %s.\n", strerror(errno));
#endif
goto out;
}

16
src/video/kmsdrm/SDL_kmsdrmvulkan.c
View File

@ -275,11 +275,15 @@ SDL_bool KMSDRM_Vulkan_CreateSurface(_THIS,
physical_devices = malloc(sizeof(VkPhysicalDevice) * gpu_count);
vkEnumeratePhysicalDevices(instance, &gpu_count, physical_devices);
/* For now, just grab the first physical device (gpu = physical_device in vkcube example).*/
/* TODO What happens on video systems with multiple display ports like the Rpi4 ? */
/* A GPU (or physical_device, in vkcube terms) is a GPU. A machine with more
than one video output doen't need to have more than one GPU, like the Pi4
which has 1 GPU and 2 video outputs.
For now, just grab the first GPU/physical_device.
TODO Manage multiple GPUs? Maybe just use the first one supporting Vulkan? */
gpu = physical_devices[0];
/* Get the display count of the phsysical device. */
/* A display is a video output. 1 GPU can have N displays.
Get the display count of the GPU. */
vkGetPhysicalDeviceDisplayPropertiesKHR(gpu, &display_count, NULL);
if (display_count == 0) {
SDL_SetError("Vulkan can't find any displays.");
@ -293,7 +297,6 @@ SDL_bool KMSDRM_Vulkan_CreateSurface(_THIS,
displays_props);
/* Get the videomode count for the first display. */
/* TODO What happens on video systems with multiple display ports like the Rpi4 ? */
vkGetDisplayModePropertiesKHR(gpu,
displays_props[0].display,
&mode_count, NULL);
@ -311,7 +314,6 @@ SDL_bool KMSDRM_Vulkan_CreateSurface(_THIS,
&mode_count, modes_props);
/* Get the planes count of the physical device. */
/* TODO: find out if we need other planes. */
vkGetPhysicalDeviceDisplayPlanePropertiesKHR(gpu, &plane_count, NULL);
if (plane_count == 0) {
SDL_SetError("Vulkan can't find any planes.");
@ -322,8 +324,8 @@ SDL_bool KMSDRM_Vulkan_CreateSurface(_THIS,
planes_props = malloc(sizeof(VkDisplayPlanePropertiesKHR) * plane_count);
vkGetPhysicalDeviceDisplayPlanePropertiesKHR(gpu, &plane_count, planes_props);
/* Get a video mode matching the window size.
REMEMBER: We have to get a small enough videomode for the window size,
/* Get a video mode equal or smaller than the window size. REMEMBER:
We have to get a small enough videomode for the window size,
because videomode determines how big the scanout region is and we can't
scanout a region bigger than the window (we would be reading past the
buffer, and Vulkan would give us a confusing VK_ERROR_SURFACE_LOST_KHR). */