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| author | Rodrigo Vivi | 2017-09-19 23:57:03 +0200 |
|---|---|---|
| committer | Rodrigo Vivi | 2017-09-20 01:04:56 +0200 |
| commit | 3b92e263dd4a38fa168d12a55ea4c8193483b884 (patch) | |
| tree | 1c9fabfa5a9c6bb7a77e3d4a84ae4d4c06a5765c /drivers/gpu/drm/i915/i915_reg.h | |
| parent | drm/i915: Shrink cnl_ddi_buf_trans (diff) | |
| download | kernel-qcow2-linux-3b92e263dd4a38fa168d12a55ea4c8193483b884.tar.gz kernel-qcow2-linux-3b92e263dd4a38fa168d12a55ea4c8193483b884.tar.xz kernel-qcow2-linux-3b92e263dd4a38fa168d12a55ea4c8193483b884.zip | |
drm/i915/cnp: Display Wa #1179: WaHardHangonHotPlug
"CNL PCH chance of hang when software accesses south display
registers after hotplug is enabled.
Workaround: Program 0xC2000 bits 11:8 = 0xF before enabling
south display hotplug detection."
"Workaround only needs to be applied to pre-production steppings
used in graphics capable SKUs, but it is easier to apply to
everything, and does not hurt."
v2: Moving from clock gating to right before enabling
SHOTPLUG_CTL as it should be.
v3: Align with SOUTH_CHICKEN1 (DK) and consequently use proper
spaces on bits definition since other bits around already use
new style. And now that checkpatch is not noise anymore I also
fixed the reg read mask to avoid going over 80 chars.
Suggested-by: Ben Widawsky <ben@bwidawsk.net>
Cc: Ben Widawsky <ben@bwidawsk.net>
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170919215703.25947-1-rodrigo.vivi@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/i915_reg.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 94b40a469afd..82f36dd0cd94 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -7471,6 +7471,8 @@ enum { #define FDI_PHASE_SYNC_OVR(pipe) (1<<(FDIA_PHASE_SYNC_SHIFT_OVR - ((pipe) * 2))) #define FDI_PHASE_SYNC_EN(pipe) (1<<(FDIA_PHASE_SYNC_SHIFT_EN - ((pipe) * 2))) #define FDI_BC_BIFURCATION_SELECT (1 << 12) +#define CHASSIS_CLK_REQ_DURATION_MASK (0xf << 8) +#define CHASSIS_CLK_REQ_DURATION(x) ((x) << 8) #define SPT_PWM_GRANULARITY (1<<0) #define SOUTH_CHICKEN2 _MMIO(0xc2004) #define FDI_MPHY_IOSFSB_RESET_STATUS (1<<13) |