This patchset fixes an issue on LNL+, where the TypeC PHY's mode/state
is detected incorrectly during HW readout for a DP-alt sink that got
enabled by BIOS/GOP, but later the sink got disconnected by the user
before the driver got loaded.
The issue in the driver is due to overlooking a change on LNL+ in the
way the PHY ready flag and pin assignment is set/cleared in the PHY
registers by the HW/FW wrt. how this works on all the earlier (ICL-MTL)
TypeC platforms.
The first 5 patches fix the issue, the rest refactor the PHY's max lane
count and pin assignment query functions, sanitizing the code, removing
duplications and validating the register values read out from the HW.
Reported-by: Charlton Lin <charlton....@intel.com>
Tested-by: Khaled Almahallawy <khaled.almahall...@intel.com>
Imre Deak (19):
drm/i915/lnl+/tc: Fix handling of an enabled/disconnected dp-alt sink
drm/i915/icl+/tc: Cache the max lane count value
drm/i915/lnl+/tc: Fix max lane count HW readout
drm/i915/lnl+/tc: Use the cached max lane count value
drm/i915/icl+/tc: Convert AUX powered WARN to a debug message
drm/i915/tc: Use the cached max lane count value
drm/i915/tc: Move getting the power domain before reading DFLEX
registers
drm/i915/tc: Move asserting the power state after reading
TCSS_DDI_STATUS
drm/i915/tc: Add an enum for the TypeC pin assignment
drm/i915/tc: Pass pin assignment value around using the pin assignment
enum
drm/i915/tc: Handle pin assignment NONE on all platforms
drm/i915/tc: Validate the pin assignment on all platforms
drm/i915/tc: Unify the way to get the pin assignment on all platforms
drm/i915/tc: Unify the way to get the max lane count value on MTL+
drm/i915/tc: Handle non-TC encoders when getting the pin assignment
drm/i915/tc: Pass intel_tc_port to internal lane mask/count helpers
dmc/i915/tc: Report pin assignment NONE in TBT-alt mode
drm/i915/tc: Cache the pin assignment value
drm/i915/tc: Debug print the pin assignment and max lane count
drivers/gpu/drm/i915/display/intel_ddi.c | 19 +-
.../gpu/drm/i915/display/intel_display_regs.h | 2 +
drivers/gpu/drm/i915/display/intel_tc.c | 217 ++++++++++++------
drivers/gpu/drm/i915/display/intel_tc.h | 72 +++++-
4 files changed, 225 insertions(+), 85 deletions(-)
--
2.49.1
