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onscreen/native: Increase secondary GPU dumb_fbs from 2 to 3

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So that they don't get overwritten prematurely during triple buffering
causing tearing.

https://launchpad.net/bugs/1999216

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1441>
This commit is contained in:
Daniel van Vugt 2022-12-09 14:22:31 +08:00 committed by Marge Bot
parent ffc2a7d3cd
commit c681b6977c
1 changed files with 10 additions and 5 deletions
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15
src/backends/native/meta-onscreen-native.c
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@ -78,7 +78,7 @@ typedef struct _MetaOnscreenNativeSecondaryGpuState
struct { struct {
MetaDrmBufferDumb *current_dumb_fb; MetaDrmBufferDumb *current_dumb_fb;
MetaDrmBufferDumb *dumb_fbs[2]; MetaDrmBufferDumb *dumb_fbs[3];
} cpu; } cpu;
gboolean noted_primary_gpu_copy_ok; gboolean noted_primary_gpu_copy_ok;
@ -1054,12 +1054,17 @@ static MetaDrmBufferDumb *
secondary_gpu_get_next_dumb_buffer (MetaOnscreenNativeSecondaryGpuState *secondary_gpu_state) secondary_gpu_get_next_dumb_buffer (MetaOnscreenNativeSecondaryGpuState *secondary_gpu_state)
{ {
MetaDrmBufferDumb *current_dumb_fb; MetaDrmBufferDumb *current_dumb_fb;
const int n_dumb_fbs = G_N_ELEMENTS (secondary_gpu_state->cpu.dumb_fbs);
int i;
current_dumb_fb = secondary_gpu_state->cpu.current_dumb_fb; current_dumb_fb = secondary_gpu_state->cpu.current_dumb_fb;
if (current_dumb_fb == secondary_gpu_state->cpu.dumb_fbs[0]) for (i = 0; i < n_dumb_fbs; i++)
return secondary_gpu_state->cpu.dumb_fbs[1]; {
else if (current_dumb_fb == secondary_gpu_state->cpu.dumb_fbs[i])
return secondary_gpu_state->cpu.dumb_fbs[0]; return secondary_gpu_state->cpu.dumb_fbs[(i + 1) % n_dumb_fbs];
}
return secondary_gpu_state->cpu.dumb_fbs[0];
} }
static MetaDrmBuffer * static MetaDrmBuffer *