From: Swati Sharma <swati2.sharma@xxxxxxxxx>
If force_dsc_fractional_bpp_en is set through debugfs allow DSC iff
compressed bpp is fractional. Continue if we computed compressed bpp is
computed as integer.
Signed-off-by: Swati Sharma <swati2.sharma@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_dp.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 011bcfe2ecc5..9098febf0c07 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1905,6 +1905,9 @@ xelpd_dsc_compute_link_config(struct intel_dp *intel_dp,
for (compressed_bppx16 = dsc_max_bpp;
compressed_bppx16 >= dsc_min_bpp;
compressed_bppx16 -= bppx16_step) {
+ if (intel_dp->force_dsc_fractional_bpp_en &&
+ !dsc_fractional_compressed_bpp(compressed_bppx16))
+ continue;
ret = dsc_compute_link_config(intel_dp,
pipe_config,
limits,
@@ -1912,6 +1915,11 @@ xelpd_dsc_compute_link_config(struct intel_dp *intel_dp,
timeslots);
if (ret == 0) {
pipe_config->dsc.compressed_bpp = compressed_bppx16;
+
+ if (intel_dp->force_dsc_fractional_bpp_en &&
+ dsc_fractional_compressed_bpp(compressed_bppx16))
+ drm_dbg_kms(&i915->drm, "Forcing DSC fractional bpp\n");
+
return 0;
}
}
--
2.40.1
