[Intel-gfx] [PATCH v3 1/1] drm/i915: Add modular FIA
Ville Syrjälä
ville.syrjala at linux.intel.com
Fri Jul 12 12:55:01 UTC 2019
On Thu, Jul 11, 2019 at 04:49:07PM -0700, Lucas De Marchi wrote:
> On Thu, Jul 11, 2019 at 04:15:42PM -0700, Summers, Stuart wrote:
> >On Thu, 2019-07-11 at 13:58 -0700, Lucas De Marchi wrote:
> >> From: Anusha Srivatsa <anusha.srivatsa at intel.com>
> >>
> >> Some platforms may have Modular FIA. If Modular FIA is used in the
> >> SOC,
> >> then Display Driver will access the additional instances of
> >> FIA based on pre-assigned offset in GTTMADDR space.
> >>
> >> Each Modular FIA instance has its own IOSF Sideband Port ID
> >> and it houses only 2 Type-C Port. In SOC that has more than
> >> two Type-C Ports, there are multiple instances of Modular FIA.
> >> Gunit will need to use different destination ID when it access
> >> different pair of Type-C Port.
> >>
> >> The DFLEXDPSP register has Modular FIA bit starting on Tiger
> >> Lake. If
> >> Modular FIA is used in the SOC, this register bit exists in all the
> >> instances of Modular FIA. IOM FW is required to program only the MF
> >> bit
> >> in first FIA instance that houses the Type-C Port 0 and Port 1, for
> >> Display Driver to read from.
> >>
> >> v2 (Lucas):
> >> - Move all accesses to FIA to be contained in intel_tc.c, along
> >> with
> >> display_fia that is now called tc_phy_fia
> >> - Save the fia instance number on intel_digital_port, so we don't
> >> have
> >> to query if modular FIA is used on every access
> >> v3 (Lucas): Make function static
> >> v4 (Lucas): Move enum phy_fia to the header and use it in
> >> intel_digital_port (suggested by Ville)
> >>
> >> Cc: Jani Nikula <jani.nikula at intel.com>
> >> Signed-off-by: Anusha Srivatsa <anusha.srivatsa at intel.com>
> >> Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
> >> Acked-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> >> ---
> >> drivers/gpu/drm/i915/display/intel_display.h | 6 +++
> >> drivers/gpu/drm/i915/display/intel_tc.c | 43 ++++++++++++++++
> >> ----
> >> drivers/gpu/drm/i915/i915_reg.h | 13 ++++--
> >> drivers/gpu/drm/i915/intel_device_info.h | 1 +
> >> drivers/gpu/drm/i915/intel_drv.h | 1 +
> >> 5 files changed, 52 insertions(+), 12 deletions(-)
> >>
> >> diff --git a/drivers/gpu/drm/i915/display/intel_display.h
> >> b/drivers/gpu/drm/i915/display/intel_display.h
> >> index 8a4a57ef82a2..8b048976f7b4 100644
> >> --- a/drivers/gpu/drm/i915/display/intel_display.h
> >> +++ b/drivers/gpu/drm/i915/display/intel_display.h
> >> @@ -243,6 +243,12 @@ enum phy {
> >>
> >> #define phy_name(a) ((a) + 'A')
> >>
> >> +enum phy_fia {
> >> + FIA1,
> >> + FIA2,
> >> + FIA3,
> >> +};
> >> +
> >> #define for_each_pipe(__dev_priv, __p) \
> >> for ((__p) = 0; (__p) < INTEL_INFO(__dev_priv)->num_pipes;
> >> (__p)++)
> >>
> >> diff --git a/drivers/gpu/drm/i915/display/intel_tc.c
> >> b/drivers/gpu/drm/i915/display/intel_tc.c
> >> index f44ee4bfe7c8..9400da4f7916 100644
> >> --- a/drivers/gpu/drm/i915/display/intel_tc.c
> >> +++ b/drivers/gpu/drm/i915/display/intel_tc.c
> >> @@ -22,6 +22,24 @@ static const char *tc_port_mode_name(enum
> >> tc_port_mode mode)
> >> return names[mode];
> >> }
> >>
> >> +static bool has_modular_fia(struct drm_i915_private *i915)
> >> +{
> >> + if (!INTEL_INFO(i915)->display.has_modular_fia)
> >> + return false;
> >> +
> >> + return intel_uncore_read(&i915->uncore,
> >> + PORT_TX_DFLEXDPSP(FIA1)) &
> >> MODULAR_FIA_MASK;
> >> +}
> >> +
> >> +static enum phy_fia tc_port_to_fia(struct drm_i915_private *i915,
> >> + enum tc_port tc_port)
> >> +{
> >> + if (!has_modular_fia(i915))
> >> + return FIA1;
> >> +
> >> + return tc_port / 2;
> >
> >I realize this is described in the commit message, but would be nice to
> >have a brief comment describing why we need this conversion.
> >
> >> +}
> >> +
> >> u32 intel_tc_port_get_lane_mask(struct intel_digital_port *dig_port)
> >> {
> >> struct drm_i915_private *i915 = to_i915(dig_port-
> >> >base.base.dev);
> >> @@ -29,7 +47,8 @@ u32 intel_tc_port_get_lane_mask(struct
> >> intel_digital_port *dig_port)
> >> struct intel_uncore *uncore = &i915->uncore;
> >> u32 lane_mask;
> >>
> >> - lane_mask = intel_uncore_read(uncore, PORT_TX_DFLEXDPSP);
> >> + lane_mask = intel_uncore_read(uncore,
> >> + PORT_TX_DFLEXDPSP(dig_port-
> >> >tc_phy_fia));
> >>
> >> WARN_ON(lane_mask == 0xffffffff);
> >>
> >> @@ -78,7 +97,8 @@ void intel_tc_port_set_fia_lane_count(struct
> >> intel_digital_port *dig_port,
> >>
> >> WARN_ON(lane_reversal && dig_port->tc_mode != TC_PORT_LEGACY);
> >>
> >> - val = intel_uncore_read(uncore, PORT_TX_DFLEXDPMLE1);
> >> + val = intel_uncore_read(uncore,
> >> + PORT_TX_DFLEXDPMLE1(dig_port-
> >> >tc_phy_fia));
> >> val &= ~DFLEXDPMLE1_DPMLETC_MASK(tc_port);
> >>
> >> switch (required_lanes) {
> >> @@ -97,7 +117,8 @@ void intel_tc_port_set_fia_lane_count(struct
> >> intel_digital_port *dig_port,
> >> MISSING_CASE(required_lanes);
> >> }
> >>
> >> - intel_uncore_write(uncore, PORT_TX_DFLEXDPMLE1, val);
> >> + intel_uncore_write(uncore,
> >> + PORT_TX_DFLEXDPMLE1(dig_port->tc_phy_fia),
> >> val);
> >> }
> >>
> >> static void tc_port_fixup_legacy_flag(struct intel_digital_port
> >> *dig_port,
> >> @@ -129,7 +150,8 @@ static u32 tc_port_live_status_mask(struct
> >> intel_digital_port *dig_port)
> >> u32 mask = 0;
> >> u32 val;
> >>
> >> - val = intel_uncore_rea
> >> d(uncore, PORT_TX_DFLEXDPSP);
> >> + val = intel_uncore_read(uncore,
> >> + PORT_TX_DFLEXDPSP(dig_port-
> >> >tc_phy_fia));
> >>
> >> if (val == 0xffffffff) {
> >> DRM_DEBUG_KMS("Port %s: PHY in TCCOLD, nothing
> >> connected\n",
> >> @@ -159,7 +181,8 @@ static bool icl_tc_phy_status_complete(struct
> >> intel_digital_port *dig_port)
> >> struct intel_uncore *uncore = &i915->uncore;
> >> u32 val;
> >>
> >> - val = intel_uncore_read(uncore, PORT_TX_DFLEXDPPMS);
> >> + val = intel_uncore_read(uncore,
> >> + PORT_TX_DFLEXDPPMS(dig_port-
> >> >tc_phy_fia));
> >> if (val == 0xffffffff) {
> >> DRM_DEBUG_KMS("Port %s: PHY in TCCOLD, assuming not
> >> complete\n",
> >> dig_port->tc_port_name);
> >> @@ -177,7 +200,8 @@ static bool icl_tc_phy_set_safe_mode(struct
> >> intel_digital_port *dig_port,
> >> struct intel_uncore *uncore = &i915->uncore;
> >> u32 val;
> >>
> >> - val = intel_uncore_read(uncore, PORT_TX_DFLEXDPCSSS);
> >> + val = intel_uncore_read(uncore,
> >> + PORT_TX_DFLEXDPCSSS(dig_port-
> >> >tc_phy_fia));
> >> if (val == 0xffffffff) {
> >> DRM_DEBUG_KMS("Port %s: PHY in TCCOLD, can't set safe-
> >> mode to %s\n",
> >> dig_port->tc_port_name,
> >> @@ -190,7 +214,8 @@ static bool icl_tc_phy_set_safe_mode(struct
> >> intel_digital_port *dig_port,
> >> if (!enable)
> >> val |= DP_PHY_MODE_STATUS_NOT_SAFE(tc_port);
> >>
> >> - intel_uncore_write(uncore, PORT_TX_DFLEXDPCSSS, val);
> >> + intel_uncore_write(uncore,
> >> + PORT_TX_DFLEXDPCSSS(dig_port->tc_phy_fia),
> >> val);
> >>
> >> if (enable && wait_for(!icl_tc_phy_status_complete(dig_port),
> >> 10))
> >> DRM_DEBUG_KMS("Port %s: PHY complete clear timed
> >> out\n",
> >> @@ -206,7 +231,8 @@ static bool icl_tc_phy_is_in_safe_mode(struct
> >> intel_digital_port *dig_port)
> >> struct intel_uncore *uncore = &i915->uncore;
> >> u32 val;
> >>
> >> - val = intel_uncore_read(uncore, PORT_TX_DFLEXDPCSSS);
> >> + val = intel_uncore_read(uncore,
> >> + PORT_TX_DFLEXDPCSSS(dig_port-
> >> >tc_phy_fia));
> >> if (val == 0xffffffff) {
> >> DRM_DEBUG_KMS("Port %s: PHY in TCCOLD, assume safe
> >> mode\n",
> >> dig_port->tc_port_name);
> >> @@ -503,4 +529,5 @@ void intel_tc_port_init(struct intel_digital_port
> >> *dig_port, bool is_legacy)
> >> mutex_init(&dig_port->tc_lock);
> >> dig_port->tc_legacy_port = is_legacy;
> >> dig_port->tc_link_refcount = 0;
> >> + dig_port->tc_phy_fia = tc_port_to_fia(i915, tc_port);
> >> }
> >> diff --git a/drivers/gpu/drm/i915/i915_reg.h
> >> b/drivers/gpu/drm/i915/i915_reg.h
> >> index 95b9ca1fda2e..d0510022013c 100644
> >> --- a/drivers/gpu/drm/i915/i915_reg.h
> >> +++ b/drivers/gpu/drm/i915/i915_reg.h
> >> @@ -2203,9 +2203,13 @@ enum i915_power_well_id {
> >> #define DW6_OLDO_DYN_PWR_DOWN_EN (1 << 28)
> >>
> >> #define FIA1_BASE 0x163000
> >> +#define FIA2_BASE 0x16E000
> >> +#define FIA3_BASE 0x16F000
> >> +#define _FIA(fia) _PICK((fia), FIA1_BASE,
> >> FIA2_BASE, FIA3_BASE)
> >> +#define _MMIO_FIA(fia, off) _MMIO(_FIA(fia) + (off))
> >>
> >> /* ICL PHY DFLEX registers */
> >> -#define PORT_TX_DFLEXDPMLE1 _MMIO(FIA1_BASE + 0x008C0)
> >> +#define PORT_TX_DFLEXDPMLE1(fia) _MMIO_FIA((fia), 0x008C0)
> >> #define DFLEXDPMLE1_DPMLETC_MASK(tc_port) (0xf << (4 *
> >> (tc_port)))
> >> #define DFLEXDPMLE1_DPMLETC_ML0(tc_port) (1 << (4 * (tc_port)))
> >> #define DFLEXDPMLE1_DPMLETC_ML1_0(tc_port) (3 << (4 * (tc_port)))
> >> @@ -11484,17 +11488,18 @@ enum skl_power_gate {
> >> _ICL_DSC1_RC_BUF_THRESH
> >> _1_UDW_PB, \
> >> _ICL_DSC1_RC_BUF_THRESH
> >> _1_UDW_PC)
> >>
> >> -#define PORT_TX_DFLEXDPSP _MMIO(FIA1_BASE +
> >> 0x008A0)
> >> +#define PORT_TX_DFLEXDPSP(fia) _MMIO_FIA((fia)
> >> , 0x008A0)
> >> +#define MODULAR_FIA_MASK (1 << 4)
> >> #define TC_LIVE_STATE_TBT(tc_port) (1 << ((tc_port) * 8 +
> >> 6))
> >> #define TC_LIVE_STATE_TC(tc_port) (1 << ((tc_port) * 8 +
> >> 5))
> >> #define DP_LANE_ASSIGNMENT_SHIFT(tc_port) ((tc_port) * 8)
> >> #define DP_LANE_ASSIGNMENT_MASK(tc_port) (0xf << ((tc_port) *
> >> 8))
> >> #define DP_LANE_ASSIGNMENT(tc_port, x) ((x) << ((tc_port) *
> >> 8))
> >>
> >> -#define PORT_TX_DFLEXDPPMS _MMIO(FIA1_BASE
> >> + 0x00890)
> >> +#define PORT_TX_DFLEXDPPMS(fia) _MMIO_FIA((fia)
> >> , 0x00890)
> >> #define DP_PHY_MODE_STATUS_COMPLETED(tc_port) (1 <<
> >> (tc_port))
> >>
> >> -#define PORT_TX_DFLEXDPCSSS _MMIO(FIA1_BASE +
> >> 0x00894)
> >> +#define PORT_TX_DFLEXDPCSSS(fia) _MMIO_FIA((fia),
> >> 0x00894)
> >> #define DP_PHY_MODE_STATUS_NOT_SAFE(tc_port) (1 <<
> >> (tc_port))
> >>
> >> #endif /* _I915_REG_H_ */
> >> diff --git a/drivers/gpu/drm/i915/intel_device_info.h
> >> b/drivers/gpu/drm/i915/intel_device_info.h
> >> index ddafc819bf30..e9dc86ed517b 100644
> >> --- a/drivers/gpu/drm/i915/intel_device_info.h
> >> +++ b/drivers/gpu/drm/i915/intel_device_info.h
> >> @@ -136,6 +136,7 @@ enum intel_ppgtt_type {
> >> func(has_gmch); \
> >> func(has_hotplug); \
> >> func(has_ipc); \
> >> + func(has_modular_fia); \
> >
> >If we have a register to tell us whether the platform supports this,
> >why do we need this feature flag?
>
> because the platform may not have the register bit that tells if the we
> have modular FIA, as is the case with Ice Lake. The bit is reserved
> there. This is actually "may_have_modular_fia" rather than
> "has_modular_fia", but the name is pretty bad to make it that way.
Are we expecting this to ping-pong between various gen12+ platforms?
If not then IMO a flag is overkill.
>
> Lucas De Marchi
>
> >
> >Thanks,
> >Stuart
> >
> >> func(has_overlay); \
> >> func(has_psr); \
> >> func(overlay_needs_physical); \
> >> diff --git a/drivers/gpu/drm/i915/intel_drv.h
> >> b/drivers/gpu/drm/i915/intel_drv.h
> >> index 770f9f6aad84..e8ecbd55476e 100644
> >> --- a/drivers/gpu/drm/i915/intel_drv.h
> >> +++ b/drivers/gpu/drm/i915/intel_drv.h
> >> @@ -1245,6 +1245,7 @@ struct intel_digital_port {
> >> bool tc_legacy_port:1;
> >> char tc_port_name[8];
> >> enum tc_port_mode tc_mode;
> >> + enum phy_fia tc_phy_fia;
> >>
> >> void (*write_infoframe)(struct intel_encoder *encoder,
> >> const struct intel_crtc_state
> >> *crtc_state,
>
>
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--
Ville Syrjälä
Intel
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