diff options
Diffstat (limited to 'samsung/exynos_drm_bts.c')
| -rw-r--r-- | samsung/exynos_drm_bts.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/samsung/exynos_drm_bts.c b/samsung/exynos_drm_bts.c index 8bed570..7fc453a 100644 --- a/samsung/exynos_drm_bts.c +++ b/samsung/exynos_drm_bts.c @@ -882,6 +882,16 @@ static void dpu_bts_update_resources(struct decon_device *decon, bool shadow_upd DPU_DEBUG_BTS(" peak = %u, rt = %u, read = %u, write = %u\n", bw.peak, bw.rt, bw.read, bw.write); + /* When concurrent writeback is enabled, writeback instant off may occur if the outfifo + * for writeback is full meanwhile the outfifo for LCD is not full yet. + * We can limit max_disp_freq to avoid it when concurrent writeback is enabled. + * Currently, the issue only occurs when all layers are solid color layers (read = 0). + */ + if ((decon->bts.max_dfs_lv_for_wb > 0) && (bw.read == 0) && (bw.write > 0)) { + decon->bts.max_disp_freq = + min(decon->bts.max_disp_freq, decon->bts.max_dfs_lv_for_wb); + } + if (shadow_updated) { /* after DECON h/w configs are updated to shadow SFR */ if (decon->bts.total_bw < decon->bts.prev_total_bw || |