diff options
| author |   Matt Roper <matthew.d.roper@intel.com> | 2019-11-27 14:13:14 -0800 |
|---|---|---|
| committer | Matt Roper <matthew.d.roper@intel.com> | 2019-12-02 08:18:54 -0800 |
| commit | f49108d0e0e7e46a2fcf7322ab8f6753f3934aa1 (patch) | |
| tree | a099e9a84a1a8716716b790091dfe1c93a91d861 /drivers/gpu/drm/i915/i915_reg.h | |
| parent | drm/i915/ehl: Make icp_digital_port_connected() use phy instead of port (diff) | |
| download | linux-dev-f49108d0e0e7e46a2fcf7322ab8f6753f3934aa1.tar.xz linux-dev-f49108d0e0e7e46a2fcf7322ab8f6753f3934aa1.zip | |
drm/i915: Program SHPD_FILTER_CNT on CNP+
The bspec tells us 'Program SHPD_FILTER_CNT with the "500 microseconds
adjusted" value before enabling hotplug detection' on CNP+. We haven't
been touching this register at all thus far, but we should probably
follow the bspec's guidance.
The register also exists on LPT and SPT, but there isn't any specific
guidance I can find on how we should be programming it there so let's
leave it be for now.
Bspec: 4342
Bspec: 31297
Bspec: 8407
Bspec: 49305
Bspec: 50473
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191127221314.575575-3-matthew.d.roper@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/i915_reg.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index a99fdf8ea53b..1a6376a97d48 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -8114,6 +8114,10 @@ enum { #define SHOTPLUG_CTL_TC _MMIO(0xc4034) #define ICP_TC_HPD_ENABLE(tc_port) (8 << (tc_port) * 4) + +#define SHPD_FILTER_CNT _MMIO(0xc4038) +#define SHPD_FILTER_CNT_500_ADJ 0x001D9 + /* Icelake DSC Rate Control Range Parameter Registers */ #define DSCA_RC_RANGE_PARAMETERS_0 _MMIO(0x6B240) #define DSCA_RC_RANGE_PARAMETERS_0_UDW _MMIO(0x6B240 + 4) |