| Message ID | 20240517073005.2414293-2-jouni.hogander@intel.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | LunarLake IO and Fast Wake changes | expand |
> -----Original Message----- > From: Hogander, Jouni <jouni.hogander@intel.com> > Sent: Friday, May 17, 2024 1:00 PM > To: intel-gfx@lists.freedesktop.org > Cc: Shankar, Uma <uma.shankar@intel.com>; Hogander, Jouni > <jouni.hogander@intel.com> > Subject: [PATCH v2 1/3] drm/i915/psr: LunarLake IO and Fast Wake time line > count maximums are 68 > > On LunarLake maximum for IO and Fast Wake time line counts are 68: 6 bits + > 5 lines added by the HW. Take this into account in calculation and when writing > the IO Wake lines. > > v2: maximum line count is 68 (6 bits + 5 lines added by HW) Looks Good to me. Reviewed-by: Uma Shankar <uma.shankar@intel.com> > Signed-off-by: Jouni Högander <jouni.hogander@intel.com> > --- > drivers/gpu/drm/i915/display/intel_psr.c | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/drivers/gpu/drm/i915/display/intel_psr.c > b/drivers/gpu/drm/i915/display/intel_psr.c > index df0d14a5023f..f5d3eb776833 100644 > --- a/drivers/gpu/drm/i915/display/intel_psr.c > +++ b/drivers/gpu/drm/i915/display/intel_psr.c > @@ -1421,8 +1421,9 @@ static bool _compute_alpm_params(struct intel_dp > *intel_dp, > fast_wake_time = precharge + preamble + phy_wake + > tfw_exit_latency; > > - if (DISPLAY_VER(i915) >= 12) > - /* TODO: Check how we can use ALPM_CTL fast wake extended > field */ > + if (DISPLAY_VER(i915) >= 20) > + max_wake_lines = 68; > + else if (DISPLAY_VER(i915) >= 12) > max_wake_lines = 12; > else > max_wake_lines = 8; > -- > 2.34.1
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c index df0d14a5023f..f5d3eb776833 100644 --- a/drivers/gpu/drm/i915/display/intel_psr.c +++ b/drivers/gpu/drm/i915/display/intel_psr.c @@ -1421,8 +1421,9 @@ static bool _compute_alpm_params(struct intel_dp *intel_dp, fast_wake_time = precharge + preamble + phy_wake + tfw_exit_latency; - if (DISPLAY_VER(i915) >= 12) - /* TODO: Check how we can use ALPM_CTL fast wake extended field */ + if (DISPLAY_VER(i915) >= 20) + max_wake_lines = 68; + else if (DISPLAY_VER(i915) >= 12) max_wake_lines = 12; else max_wake_lines = 8;
On LunarLake maximum for IO and Fast Wake time line counts are 68: 6 bits + 5 lines added by the HW. Take this into account in calculation and when writing the IO Wake lines. v2: maximum line count is 68 (6 bits + 5 lines added by HW) Signed-off-by: Jouni Högander <jouni.hogander@intel.com> --- drivers/gpu/drm/i915/display/intel_psr.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)