diff options
| author | Gustavo Sousa <gustavo.sousa@intel.com> | 2023-09-12 12:59:23 -0300 |
|---|---|---|
| committer | Matt Roper <matthew.d.roper@intel.com> | 2023-09-18 10:04:43 -0700 |
| commit | e356289680321c39036847b5967c26716d285c3e (patch) | |
| tree | 650e88bdc9a8be1b96c06eacd700385492c37da9 /drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h | |
| parent | 4ed2b53b463f23a578e5948062f51a63f4d30fbe (diff) | |
drm/i915/cx0: Add step for programming msgbus timer
There was a recent update in the BSpec adding an extra step to the PLL
enable sequence, which is for programming the msgbus timer. Since we
also touch PHY registers during hw readout, let's do the programming
when starting a transaction rather than only when doing the PLL enable
sequence.
This might be the missing step that was causing the timeouts
that we have recently seen during C20 SRAM register programming
sequences. With this in place, we shouldn't need the logic to bump the
timer thresholds, since now we have a documented value that should be
set peform programming the registers. As such, let's also remove
intel_cx0_bus_check_and_bump_timer(), but keep the part that checks if
hardware really detected a timeout, which might be useful debugging
information.
v2:
- Use debug level instead of warning for the message notifying that
the hardware did not detect the timeout. (Mika)
- Got a new BSpec update clarifying that we need to program the msgbus
timer of both PHY lanes. Update the changes to reflect that.
(Gustavo)
BSpec: 64568
Cc: Mika Kahola <mika.kahola@intel.com>
Signed-off-by: Gustavo Sousa <gustavo.sousa@intel.com>
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230912155923.39494-1-gustavo.sousa@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h b/drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h index b2db4cc366d6..adf8f4ce0d49 100644 --- a/drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h +++ b/drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h @@ -121,7 +121,7 @@ _XELPDP_PORT_MSGBUS_TIMER_LN0_USBC2) + (lane) * 4) #define XELPDP_PORT_MSGBUS_TIMER_TIMED_OUT REG_BIT(31) #define XELPDP_PORT_MSGBUS_TIMER_VAL_MASK REG_GENMASK(23, 0) -#define XELPDP_PORT_MSGBUS_TIMER_VAL(val) REG_FIELD_PREP(XELPDP_PORT_MSGBUS_TIMER_VAL_MASK, val) +#define XELPDP_PORT_MSGBUS_TIMER_VAL REG_FIELD_PREP(XELPDP_PORT_MSGBUS_TIMER_VAL_MASK, 0xa000) #define _XELPDP_PORT_CLOCK_CTL_A 0x640E0 #define _XELPDP_PORT_CLOCK_CTL_B 0x641E0 |