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[Video/KMSDRM] Honor the device index in Vulkan. Add notes about the display index.

This commit is contained in:
Manuel Alfayate Corchete 2020-12-19 20:15:50 +01:00
parent ab3a390e26
commit cf48955680
1 changed files with 21 additions and 11 deletions
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32
src/video/kmsdrm/SDL_kmsdrmvulkan.c
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@ -202,8 +202,18 @@ SDL_bool KMSDRM_Vulkan_CreateSurface(_THIS,
VkResult result;
SDL_bool ret = SDL_FALSE;
/* We don't receive a display index in KMSDRM_CreateDevice(), only
a device index, which determines the GPU to use, but not the output.
So we simply use the first connected output (ie, the first connected
video output) for now.
In other words, change this index to select a different input. Easy! */
int display_index = 0;
int i;
SDL_VideoData *viddata = ((SDL_VideoData *)_this->driverdata);
/* Get the function pointers for the functions we will use. */
PFN_vkGetInstanceProcAddr vkGetInstanceProcAddr =
(PFN_vkGetInstanceProcAddr)_this->vulkan_config.vkGetInstanceProcAddr;
@ -278,11 +288,11 @@ SDL_bool KMSDRM_Vulkan_CreateSurface(_THIS,
/* 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];
We grab the GPU/physical_device with the index we got in KMSDR_CreateDevice(). */
gpu = physical_devices[viddata->devindex];
/* A display is a video output. 1 GPU can have N displays.
Vulkan only counts the connected displays.
Get the display count of the GPU. */
vkGetPhysicalDeviceDisplayPropertiesKHR(gpu, &display_count, NULL);
if (display_count == 0) {
@ -298,19 +308,19 @@ SDL_bool KMSDRM_Vulkan_CreateSurface(_THIS,
/* Get the videomode count for the first display. */
vkGetDisplayModePropertiesKHR(gpu,
displays_props[0].display,
displays_props[display_index].display,
&mode_count, NULL);
if (mode_count == 0) {
SDL_SetError("Vulkan can't find any video modes for display %i (%s)\n", 0,
displays_props[0].displayName);
displays_props[display_index].displayName);
goto clean;
}
/* Get the props of the videomodes for the first display. */
modes_props = (VkDisplayModePropertiesKHR *) malloc(mode_count * sizeof(*modes_props));
vkGetDisplayModePropertiesKHR(gpu,
displays_props[0].display,
displays_props[display_index].display,
&mode_count, modes_props);
/* Get the planes count of the physical device. */
@ -349,7 +359,7 @@ SDL_bool KMSDRM_Vulkan_CreateSurface(_THIS,
display_mode_create_info.sType = VK_STRUCTURE_TYPE_DISPLAY_MODE_CREATE_INFO_KHR;
display_mode_create_info.parameters = display_mode_props.parameters;
result = vkCreateDisplayModeKHR(gpu,
displays_props[0].display,
displays_props[display_index].display,
&display_mode_create_info,
NULL, &display_mode);
if (result != VK_SUCCESS) {
@ -364,17 +374,17 @@ SDL_bool KMSDRM_Vulkan_CreateSurface(_THIS,
display_plane_surface_create_info.sType = VK_STRUCTURE_TYPE_DISPLAY_SURFACE_CREATE_INFO_KHR;
display_plane_surface_create_info.displayMode = display_mode;
display_plane_surface_create_info.planeIndex = 0; /* For now, simply use the first plane. */
/* For now, simply use the first plane. */
display_plane_surface_create_info.planeIndex = 0;
display_plane_surface_create_info.imageExtent = image_size;
result = vkCreateDisplayPlaneSurfaceKHR(instance,
&display_plane_surface_create_info,
NULL,
surface);
if(result != VK_SUCCESS)
{
SDL_SetError("vkCreateKMSDRMSurfaceKHR failed: %s", SDL_Vulkan_GetResultString(result));
SDL_SetError("vkCreateKMSDRMSurfaceKHR failed: %s",
SDL_Vulkan_GetResultString(result));
goto clean;
}