Falling back to the lowest value is likely the only thing we can do, but
doing it silently seems like a bad thing to do. Catch it early and make
loud noises.
Cc: Alex Deucher <alexander.deuc...@amd.com>
Cc: Thierry Reding <tred...@nvidia.com>
Cc: Rob Clark <robdcl...@gmail.com>
Cc: Sean Paul <seanp...@chromium.org>
Cc: Manasi Navare <manasi.d.nav...@intel.com>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Jani Nikula <jani.nik...@intel.com>
---
drivers/gpu/drm/drm_dp_helper.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
index 08af8d6b844b..dca21b5a03ec 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -137,8 +137,10 @@ EXPORT_SYMBOL(drm_dp_link_train_channel_eq_delay);
u8 drm_dp_link_rate_to_bw_code(int link_rate)
{
switch (link_rate) {
- case 162000:
default:
+ WARN(1, "unknown DP link rate %d, using %x\n", link_rate,
+ DP_LINK_BW_1_62);
+ case 162000:
return DP_LINK_BW_1_62;
case 270000:
return DP_LINK_BW_2_7;
@@ -151,8 +153,9 @@ EXPORT_SYMBOL(drm_dp_link_rate_to_bw_code);
int drm_dp_bw_code_to_link_rate(u8 link_bw)
{
switch (link_bw) {
- case DP_LINK_BW_1_62:
default:
+ WARN(1, "unknown DP link bw code %x, using 162000\n", link_bw);
+ case DP_LINK_BW_1_62:
return 162000;
case DP_LINK_BW_2_7:
return 270000;
--
2.11.0
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