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| author |   José Roberto de Souza <jose.souza@intel.com> | 2020-04-14 12:49:54 -0700 |
|---|---|---|
| committer | José Roberto de Souza <jose.souza@intel.com> | 2020-04-17 15:01:34 -0700 |
| commit | 3c02934b24e37344b8c1c6f9df55efc8891e6251 (patch) | |
| tree | 3c545bb5dde8fd9107df3a01e91c4f61eac3ca8a /drivers/gpu/drm/i915/i915_reg.h | |
| parent | drm/i915/tc: Skip ref held check for TC legacy aux power wells (diff) | |
| download | linux-dev-3c02934b24e37344b8c1c6f9df55efc8891e6251.tar.xz linux-dev-3c02934b24e37344b8c1c6f9df55efc8891e6251.zip | |
drm/i915/tc/tgl: Implement TC cold sequences
TC ports can enter in TCCOLD to save power and is required to request
to PCODE to exit this state before use or read to TC registers.
For TGL there is a new MBOX command to do that with a parameter to ask
PCODE to exit and block TCCOLD entry or unblock TCCOLD entry.
So adding a new power domain to reuse the refcount and only allow
TC cold when all TC ports are not in use.
v2:
- fixed missing case in intel_display_power_domain_str()
- moved tgl_tc_cold_request to intel_display_power.c
- renamed TGL_TC_COLD_OFF to TGL_TC_COLD_OFF_POWER_DOMAINS
- added all TC and TBT aux power domains to
TGL_TC_COLD_OFF_POWER_DOMAINS
v3:
- added one msec sleep when PCODE returns -EAGAIN
- added timeout of 5msec to not loop forever if
sandybridge_pcode_write_timeout() keeps returning -EAGAIN
v4:
- Made failure to block or unblock TC cold a error
- removed 5msec timeout, instead giving PCODE 1msec by up 3 times to
recover from the internal error
v5:
- only sleeping 1msec when ret is -EAGAIN
BSpec: 49294
Cc: Imre Deak <imre.deak@intel.com>
Cc: Cooper Chiou <cooper.chiou@intel.com>
Cc: Kai-Heng Feng <kai.heng.feng@canonical.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200414194956.164323-6-jose.souza@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 ab4dafb163a2..9e192629d5e5 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -9111,6 +9111,10 @@ enum { #define ICL_PCODE_EXIT_TCCOLD 0x12 #define HSW_PCODE_DE_WRITE_FREQ_REQ 0x17 #define DISPLAY_IPS_CONTROL 0x19 +#define TGL_PCODE_TCCOLD 0x26 +#define TGL_PCODE_EXIT_TCCOLD_DATA_L_EXIT_FAILED REG_BIT(0) +#define TGL_PCODE_EXIT_TCCOLD_DATA_H_BLOCK_REQ 0 +#define TGL_PCODE_EXIT_TCCOLD_DATA_H_UNBLOCK_REQ REG_BIT(0) /* See also IPS_CTL */ #define IPS_PCODE_CONTROL (1 << 30) #define HSW_PCODE_DYNAMIC_DUTY_CYCLE_CONTROL 0x1A |