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| author | Kumar, Mahesh <mahesh1.kumar@intel.com> | 2017-08-17 19:15:25 +0530 |
|---|---|---|
| committer | Maarten Lankhorst <maarten.lankhorst@linux.intel.com> | 2017-09-07 13:34:24 +0200 |
| commit | 446e850c38d9092688df3f1e5d610f3bff2a4152 (patch) | |
| tree | 37350e0e8c55c9ff483d8a1ec1d31ab3945189e4 /drivers/gpu/drm/i915/intel_pm.c | |
| parent | ca47667f523e588318f89c735e127c256de6cb16 (diff) | |
| download | op-kernel-dev-446e850c38d9092688df3f1e5d610f3bff2a4152.zip op-kernel-dev-446e850c38d9092688df3f1e5d610f3bff2a4152.tar.gz | |
drm/i915/glk: IPC linetime watermark workaround for GLK
IF IPC is enabled LINETIME_WM value should be half of calculated value
line time = ROUNDDOWN(1/2 * Calculated Line Time)
Earlier code was rounding-up the value, But updated Bspec says we should
take the ROUNDDOWN. This patch corrects that as well.
Signed-off-by: Mahesh Kumar <mahesh1.kumar@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170817134529.2839-5-mahesh1.kumar@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_pm.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 3168a55..629ad54 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -4622,9 +4622,10 @@ skl_compute_linetime_wm(struct intel_crtc_state *cstate) linetime_wm = fixed16_to_u32_round_up(mul_u32_fixed16(8, linetime_us)); - /* Display WA #1135: bxt. */ - if (IS_BROXTON(dev_priv) && dev_priv->ipc_enabled) - linetime_wm = DIV_ROUND_UP(linetime_wm, 2); + /* Display WA #1135: bxt:ALL GLK:ALL */ + if ((IS_BROXTON(dev_priv) || IS_GEMINILAKE(dev_priv)) && + dev_priv->ipc_enabled) + linetime_wm /= 2; return linetime_wm; } |
