Quoting Clint Taylor (2024-10-25 17:47:38-03:00) >C10 phy timeouts occur on xe3lpd if the c10 bus is reset every >transaction. Starting with xe3lpd this is bus reset not necessary I provided a r-b with minor suggestions to this patch in the v4 series: https://lore.kernel.org/intel-xe/172986437914.1548.2518455286416273948@gjsousa-mobl2/ -- Gustavo Sousa > >Signed-off-by: Clint Taylor <clinton.a.taylor@xxxxxxxxx> >--- > drivers/gpu/drm/i915/display/intel_cx0_phy.c | 6 ++++-- > 1 file changed, 4 insertions(+), 2 deletions(-) > >diff --git a/drivers/gpu/drm/i915/display/intel_cx0_phy.c b/drivers/gpu/drm/i915/display/intel_cx0_phy.c >index 4d6e1c135bdc..c6e0cbff5201 100644 >--- a/drivers/gpu/drm/i915/display/intel_cx0_phy.c >+++ b/drivers/gpu/drm/i915/display/intel_cx0_phy.c >@@ -224,7 +224,8 @@ static int __intel_cx0_read_once(struct intel_encoder *encoder, > * down and let the message bus to end up > * in a known state > */ >- intel_cx0_bus_reset(encoder, lane); >+ if (DISPLAY_VER(i915) < 30) >+ intel_cx0_bus_reset(encoder, lane); > > return REG_FIELD_GET(XELPDP_PORT_P2M_DATA_MASK, val); > } >@@ -313,7 +314,8 @@ static int __intel_cx0_write_once(struct intel_encoder *encoder, > * down and let the message bus to end up > * in a known state > */ >- intel_cx0_bus_reset(encoder, lane); >+ if (DISPLAY_VER(i915) < 30) >+ intel_cx0_bus_reset(encoder, lane); > > return 0; > } >-- >2.25.1 >
