From: Su Sung Chung <su.ch...@amd.com>
[why]
during It's possible to call dcn_validate_bandwidth with no plane.
In that case, as we are only intersted in if output timing is supported or not,
even if we cannot support native resolution, we still want to support lower
resolution if it is valid
[how]
if there exist no surface, make viewport/rec_out size at max 1080p. It is
already known that 1080p x 6(max # of pipes) is supported, so if we fail
validation, it is because of the stream
Signed-off-by: Su Sung Chung <su.ch...@amd.com>
Reviewed-by: Dmytro Laktyushkin <dmytro.laktyush...@amd.com>
Acked-by: Leo Li <sunpeng...@amd.com>
---
drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c
b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c
index 0a336c8..5c1e0ad 100644
--- a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c
+++ b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c
@@ -872,8 +872,19 @@ bool dcn_validate_bandwidth(
v->lb_bit_per_pixel[input_idx] = 30;
v->viewport_width[input_idx] =
pipe->stream->timing.h_addressable;
v->viewport_height[input_idx] =
pipe->stream->timing.v_addressable;
- v->scaler_rec_out_width[input_idx] =
pipe->stream->timing.h_addressable;
- v->scaler_recout_height[input_idx] =
pipe->stream->timing.v_addressable;
+ /*
+ * for cases where we have no plane, we want to
validate up to 1080p
+ * source size because here we are only interested in
if the output
+ * timing is supported or not. if we cannot support
native resolution
+ * of the high res display, we still want to support
lower res up scale
+ * to native
+ */
+ if (v->viewport_width[input_idx] > 1920)
+ v->viewport_width[input_idx] = 1920;
+ if (v->viewport_height[input_idx] > 1080)
+ v->viewport_height[input_idx] = 1080;
+ v->scaler_rec_out_width[input_idx] =
v->viewport_width[input_idx];
+ v->scaler_recout_height[input_idx] =
v->viewport_height[input_idx];
v->override_hta_ps[input_idx] = 1;
v->override_vta_ps[input_idx] = 1;
v->override_hta_pschroma[input_idx] = 1;
--
2.7.4
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