| Message ID | 20210217065519.31081-1-shawn.c.lee@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2] drm/i915/vbt: update DP max link rate table | expand |
On Wed, Feb 17, 2021 at 02:55:19PM +0800, Lee Shawn C wrote: > According to Bspec #20124, max link rate table for DP was updated > at BDB version 230. Max link rate can support upto UHBR. > > After migrate to BDB v230, the definition for LBR, HBR2 and HBR3 > were changed. For backward compatibility. If BDB version was > from 216 to 229. Driver have to follow original rule to configure > DP max link rate value from VBT. > > v2: split the mapping table to two for old and new BDB definition. > > Cc: Ville Syrjala <ville.syrjala@linux.intel.com> > Cc: Imre Deak <imre.deak@intel.com> > Cc: Jani Nikula <jani.nikula@linux.intel.com> > Cc: Cooper Chiou <cooper.chiou@intel.com> > Cc: William Tseng <william.tseng@intel.com> > Signed-off-by: Lee Shawn C <shawn.c.lee@intel.com> > --- > drivers/gpu/drm/i915/display/intel_bios.c | 72 +++++++++++++++---- > drivers/gpu/drm/i915/display/intel_vbt_defs.h | 23 ++++-- > 2 files changed, 74 insertions(+), 21 deletions(-) > > diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c > index 7902d4c2673e..a094c966f37f 100644 > --- a/drivers/gpu/drm/i915/display/intel_bios.c > +++ b/drivers/gpu/drm/i915/display/intel_bios.c > @@ -1759,6 +1759,58 @@ static enum port dvo_port_to_port(struct drm_i915_private *dev_priv, > dvo_port); > } > > +static void parse_bdb_230_dp_max_link_rate(const struct child_device_config *child, > + struct ddi_vbt_port_info *info) > +{ > + switch (child->dp_max_link_rate) { > + case BDB_230_VBT_DP_MAX_LINK_RATE_UHBR20: > + info->dp_max_link_rate = 2000000; > + break; > + case BDB_230_VBT_DP_MAX_LINK_RATE_UHBR13P5: > + info->dp_max_link_rate = 1350000; > + break; > + case BDB_230_VBT_DP_MAX_LINK_RATE_UHBR10: > + info->dp_max_link_rate = 1000000; > + break; > + case BDB_230_VBT_DP_MAX_LINK_RATE_HBR3: > + info->dp_max_link_rate = 810000; > + break; > + case BDB_230_VBT_DP_MAX_LINK_RATE_HBR2: > + info->dp_max_link_rate = 540000; > + break; > + case BDB_230_VBT_DP_MAX_LINK_RATE_HBR: > + info->dp_max_link_rate = 270000; > + break; > + case BDB_230_VBT_DP_MAX_LINK_RATE_LBR: > + info->dp_max_link_rate = 162000; > + break; > + case BDB_230_VBT_DP_MAX_LINK_RATE_DEF: > + default: > + info->dp_max_link_rate = 0; > + break; > + } > +} > + > +static void parse_bdb_216_dp_max_link_rate(const struct child_device_config *child, > + struct ddi_vbt_port_info *info) > +{ > + switch (child->dp_max_link_rate) { > + default: > + case BDB_216_VBT_DP_MAX_LINK_RATE_HBR3: > + info->dp_max_link_rate = 810000; > + break; > + case BDB_216_VBT_DP_MAX_LINK_RATE_HBR2: > + info->dp_max_link_rate = 540000; > + break; > + case BDB_216_VBT_DP_MAX_LINK_RATE_HBR: > + info->dp_max_link_rate = 270000; > + break; > + case BDB_216_VBT_DP_MAX_LINK_RATE_LBR: > + info->dp_max_link_rate = 162000; > + break; > + } > +} Looks pretty good. One minor nit is that I would prefer these to be pure functions. Ie. they should just directly return the link rate instead of assigning it anywhere. Then we can just do: if (bdb_version >= 230) info->dp_max_link_rate = parse_bdb_230_dp_max_link_rate(child) else info->dp_max_link_rate = parse_bdb_216_dp_max_link_rate(child) > + > static void parse_ddi_port(struct drm_i915_private *dev_priv, > struct display_device_data *devdata, > u8 bdb_version) > @@ -1884,21 +1936,11 @@ static void parse_ddi_port(struct drm_i915_private *dev_priv, > > /* DP max link rate for CNL+ */ > if (bdb_version >= 216) { > - switch (child->dp_max_link_rate) { > - default: > - case VBT_DP_MAX_LINK_RATE_HBR3: > - info->dp_max_link_rate = 810000; > - break; > - case VBT_DP_MAX_LINK_RATE_HBR2: > - info->dp_max_link_rate = 540000; > - break; > - case VBT_DP_MAX_LINK_RATE_HBR: > - info->dp_max_link_rate = 270000; > - break; > - case VBT_DP_MAX_LINK_RATE_LBR: > - info->dp_max_link_rate = 162000; > - break; > - } > + if (bdb_version >= 230) > + parse_bdb_230_dp_max_link_rate(child, info); > + else > + parse_bdb_216_dp_max_link_rate(child, info); > + > drm_dbg_kms(&dev_priv->drm, > "Port %c VBT DP max link rate: %d\n", > port_name(port), info->dp_max_link_rate); > diff --git a/drivers/gpu/drm/i915/display/intel_vbt_defs.h b/drivers/gpu/drm/i915/display/intel_vbt_defs.h > index 6d10fa037751..0d80b04b34be 100644 > --- a/drivers/gpu/drm/i915/display/intel_vbt_defs.h > +++ b/drivers/gpu/drm/i915/display/intel_vbt_defs.h > @@ -343,10 +343,21 @@ enum vbt_gmbus_ddi { > #define DP_AUX_H 0x80 > #define DP_AUX_I 0x90 > > -#define VBT_DP_MAX_LINK_RATE_HBR3 0 > -#define VBT_DP_MAX_LINK_RATE_HBR2 1 > -#define VBT_DP_MAX_LINK_RATE_HBR 2 > -#define VBT_DP_MAX_LINK_RATE_LBR 3 > +/* DP max link rate 216+ */ > +#define BDB_216_VBT_DP_MAX_LINK_RATE_HBR3 0 > +#define BDB_216_VBT_DP_MAX_LINK_RATE_HBR2 1 > +#define BDB_216_VBT_DP_MAX_LINK_RATE_HBR 2 > +#define BDB_216_VBT_DP_MAX_LINK_RATE_LBR 3 > + > +/* DP max link rate 230+ */ > +#define BDB_230_VBT_DP_MAX_LINK_RATE_DEF 0 > +#define BDB_230_VBT_DP_MAX_LINK_RATE_LBR 1 > +#define BDB_230_VBT_DP_MAX_LINK_RATE_HBR 2 > +#define BDB_230_VBT_DP_MAX_LINK_RATE_HBR2 3 > +#define BDB_230_VBT_DP_MAX_LINK_RATE_HBR3 4 > +#define BDB_230_VBT_DP_MAX_LINK_RATE_UHBR10 5 > +#define BDB_230_VBT_DP_MAX_LINK_RATE_UHBR13P5 6 > +#define BDB_230_VBT_DP_MAX_LINK_RATE_UHBR20 7 > > /* > * The child device config, aka the display device data structure, provides a > @@ -445,8 +456,8 @@ struct child_device_config { > u16 dp_gpio_pin_num; /* 195 */ > u8 dp_iboost_level:4; /* 196 */ > u8 hdmi_iboost_level:4; /* 196 */ > - u8 dp_max_link_rate:2; /* 216 CNL+ */ > - u8 dp_max_link_rate_reserved:6; /* 216 */ > + u8 dp_max_link_rate:3; /* 230 CNL+ */ > + u8 dp_max_link_rate_reserved:5; /* 230 */ > } __packed; > > struct bdb_general_definitions { > -- > 2.17.1
On Wed, Feb 17, 2021 at 1:22 p.m., Ville Syrjälä wrote: >On Wed, Feb 17, 2021 at 02:55:19PM +0800, Lee Shawn C wrote: >> According to Bspec #20124, max link rate table for DP was updated at >> BDB version 230. Max link rate can support upto UHBR. >> >> After migrate to BDB v230, the definition for LBR, HBR2 and HBR3 were >> changed. For backward compatibility. If BDB version was from 216 to >> 229. Driver have to follow original rule to configure DP max link rate >> value from VBT. >> >> v2: split the mapping table to two for old and new BDB definition. >> >> Cc: Ville Syrjala <ville.syrjala@linux.intel.com> >> Cc: Imre Deak <imre.deak@intel.com> >> Cc: Jani Nikula <jani.nikula@linux.intel.com> >> Cc: Cooper Chiou <cooper.chiou@intel.com> >> Cc: William Tseng <william.tseng@intel.com> >> Signed-off-by: Lee Shawn C <shawn.c.lee@intel.com> >> --- >> drivers/gpu/drm/i915/display/intel_bios.c | 72 +++++++++++++++---- >> drivers/gpu/drm/i915/display/intel_vbt_defs.h | 23 ++++-- >> 2 files changed, 74 insertions(+), 21 deletions(-) >> >> diff --git a/drivers/gpu/drm/i915/display/intel_bios.c >> b/drivers/gpu/drm/i915/display/intel_bios.c >> index 7902d4c2673e..a094c966f37f 100644 >> --- a/drivers/gpu/drm/i915/display/intel_bios.c >> +++ b/drivers/gpu/drm/i915/display/intel_bios.c >> @@ -1759,6 +1759,58 @@ static enum port dvo_port_to_port(struct drm_i915_private *dev_priv, >> dvo_port); >> } >> >> +static void parse_bdb_230_dp_max_link_rate(const struct child_device_config *child, >> + struct ddi_vbt_port_info *info) { >> + switch (child->dp_max_link_rate) { >> + case BDB_230_VBT_DP_MAX_LINK_RATE_UHBR20: >> + info->dp_max_link_rate = 2000000; >> + break; >> + case BDB_230_VBT_DP_MAX_LINK_RATE_UHBR13P5: >> + info->dp_max_link_rate = 1350000; >> + break; >> + case BDB_230_VBT_DP_MAX_LINK_RATE_UHBR10: >> + info->dp_max_link_rate = 1000000; >> + break; >> + case BDB_230_VBT_DP_MAX_LINK_RATE_HBR3: >> + info->dp_max_link_rate = 810000; >> + break; >> + case BDB_230_VBT_DP_MAX_LINK_RATE_HBR2: >> + info->dp_max_link_rate = 540000; >> + break; >> + case BDB_230_VBT_DP_MAX_LINK_RATE_HBR: >> + info->dp_max_link_rate = 270000; >> + break; >> + case BDB_230_VBT_DP_MAX_LINK_RATE_LBR: >> + info->dp_max_link_rate = 162000; >> + break; >> + case BDB_230_VBT_DP_MAX_LINK_RATE_DEF: >> + default: >> + info->dp_max_link_rate = 0; >> + break; >> + } >> +} >> + >> +static void parse_bdb_216_dp_max_link_rate(const struct child_device_config *child, >> + struct ddi_vbt_port_info *info) { >> + switch (child->dp_max_link_rate) { >> + default: >> + case BDB_216_VBT_DP_MAX_LINK_RATE_HBR3: >> + info->dp_max_link_rate = 810000; >> + break; >> + case BDB_216_VBT_DP_MAX_LINK_RATE_HBR2: >> + info->dp_max_link_rate = 540000; >> + break; >> + case BDB_216_VBT_DP_MAX_LINK_RATE_HBR: >> + info->dp_max_link_rate = 270000; >> + break; >> + case BDB_216_VBT_DP_MAX_LINK_RATE_LBR: >> + info->dp_max_link_rate = 162000; >> + break; >> + } >> +} > >Looks pretty good. One minor nit is that I would prefer these >to be pure functions. Ie. they should just directly return >the link rate instead of assigning it anywhere. > >Then we can just do: >if (bdb_version >= 230) > info->dp_max_link_rate = parse_bdb_230_dp_max_link_rate(child) >else > info->dp_max_link_rate = parse_bdb_216_dp_max_link_rate(child) > Just modify the code like this and send patch v3 for review. Thanks for comment! Best regards, Shawn >> + >> static void parse_ddi_port(struct drm_i915_private *dev_priv, >> struct display_device_data *devdata, >> u8 bdb_version) >> @@ -1884,21 +1936,11 @@ static void parse_ddi_port(struct >> drm_i915_private *dev_priv, >> >> /* DP max link rate for CNL+ */ >> if (bdb_version >= 216) { >> - switch (child->dp_max_link_rate) { >> - default: >> - case VBT_DP_MAX_LINK_RATE_HBR3: >> - info->dp_max_link_rate = 810000; >> - break; >> - case VBT_DP_MAX_LINK_RATE_HBR2: >> - info->dp_max_link_rate = 540000; >> - break; >> - case VBT_DP_MAX_LINK_RATE_HBR: >> - info->dp_max_link_rate = 270000; >> - break; >> - case VBT_DP_MAX_LINK_RATE_LBR: >> - info->dp_max_link_rate = 162000; >> - break; >> - } >> + if (bdb_version >= 230) >> + parse_bdb_230_dp_max_link_rate(child, info); >> + else >> + parse_bdb_216_dp_max_link_rate(child, info); >> + >> drm_dbg_kms(&dev_priv->drm, >> "Port %c VBT DP max link rate: %d\n", >> port_name(port), info->dp_max_link_rate); diff --git >> a/drivers/gpu/drm/i915/display/intel_vbt_defs.h >> b/drivers/gpu/drm/i915/display/intel_vbt_defs.h >> index 6d10fa037751..0d80b04b34be 100644 >> --- a/drivers/gpu/drm/i915/display/intel_vbt_defs.h >> +++ b/drivers/gpu/drm/i915/display/intel_vbt_defs.h >> @@ -343,10 +343,21 @@ enum vbt_gmbus_ddi { #define DP_AUX_H 0x80 >> #define DP_AUX_I 0x90 >> >> -#define VBT_DP_MAX_LINK_RATE_HBR3 0 >> -#define VBT_DP_MAX_LINK_RATE_HBR2 1 >> -#define VBT_DP_MAX_LINK_RATE_HBR 2 >> -#define VBT_DP_MAX_LINK_RATE_LBR 3 >> +/* DP max link rate 216+ */ >> +#define BDB_216_VBT_DP_MAX_LINK_RATE_HBR3 0 >> +#define BDB_216_VBT_DP_MAX_LINK_RATE_HBR2 1 >> +#define BDB_216_VBT_DP_MAX_LINK_RATE_HBR 2 >> +#define BDB_216_VBT_DP_MAX_LINK_RATE_LBR 3 >> + >> +/* DP max link rate 230+ */ >> +#define BDB_230_VBT_DP_MAX_LINK_RATE_DEF 0 >> +#define BDB_230_VBT_DP_MAX_LINK_RATE_LBR 1 >> +#define BDB_230_VBT_DP_MAX_LINK_RATE_HBR 2 >> +#define BDB_230_VBT_DP_MAX_LINK_RATE_HBR2 3 >> +#define BDB_230_VBT_DP_MAX_LINK_RATE_HBR3 4 >> +#define BDB_230_VBT_DP_MAX_LINK_RATE_UHBR10 5 >> +#define BDB_230_VBT_DP_MAX_LINK_RATE_UHBR13P5 6 >> +#define BDB_230_VBT_DP_MAX_LINK_RATE_UHBR20 7 >> >> /* >> * The child device config, aka the display device data structure, >> provides a @@ -445,8 +456,8 @@ struct child_device_config { >> u16 dp_gpio_pin_num; /* 195 */ >> u8 dp_iboost_level:4; /* 196 */ >> u8 hdmi_iboost_level:4; /* 196 */ >> - u8 dp_max_link_rate:2; /* 216 CNL+ */ >> - u8 dp_max_link_rate_reserved:6; /* 216 */ >> + u8 dp_max_link_rate:3; /* 230 CNL+ */ >> + u8 dp_max_link_rate_reserved:5; /* 230 */ >> } __packed; >> >> struct bdb_general_definitions { >> -- >> 2.17.1 > >-- >Ville Syrjälä >Intel
diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c index 7902d4c2673e..a094c966f37f 100644 --- a/drivers/gpu/drm/i915/display/intel_bios.c +++ b/drivers/gpu/drm/i915/display/intel_bios.c @@ -1759,6 +1759,58 @@ static enum port dvo_port_to_port(struct drm_i915_private *dev_priv, dvo_port); } +static void parse_bdb_230_dp_max_link_rate(const struct child_device_config *child, + struct ddi_vbt_port_info *info) +{ + switch (child->dp_max_link_rate) { + case BDB_230_VBT_DP_MAX_LINK_RATE_UHBR20: + info->dp_max_link_rate = 2000000; + break; + case BDB_230_VBT_DP_MAX_LINK_RATE_UHBR13P5: + info->dp_max_link_rate = 1350000; + break; + case BDB_230_VBT_DP_MAX_LINK_RATE_UHBR10: + info->dp_max_link_rate = 1000000; + break; + case BDB_230_VBT_DP_MAX_LINK_RATE_HBR3: + info->dp_max_link_rate = 810000; + break; + case BDB_230_VBT_DP_MAX_LINK_RATE_HBR2: + info->dp_max_link_rate = 540000; + break; + case BDB_230_VBT_DP_MAX_LINK_RATE_HBR: + info->dp_max_link_rate = 270000; + break; + case BDB_230_VBT_DP_MAX_LINK_RATE_LBR: + info->dp_max_link_rate = 162000; + break; + case BDB_230_VBT_DP_MAX_LINK_RATE_DEF: + default: + info->dp_max_link_rate = 0; + break; + } +} + +static void parse_bdb_216_dp_max_link_rate(const struct child_device_config *child, + struct ddi_vbt_port_info *info) +{ + switch (child->dp_max_link_rate) { + default: + case BDB_216_VBT_DP_MAX_LINK_RATE_HBR3: + info->dp_max_link_rate = 810000; + break; + case BDB_216_VBT_DP_MAX_LINK_RATE_HBR2: + info->dp_max_link_rate = 540000; + break; + case BDB_216_VBT_DP_MAX_LINK_RATE_HBR: + info->dp_max_link_rate = 270000; + break; + case BDB_216_VBT_DP_MAX_LINK_RATE_LBR: + info->dp_max_link_rate = 162000; + break; + } +} + static void parse_ddi_port(struct drm_i915_private *dev_priv, struct display_device_data *devdata, u8 bdb_version) @@ -1884,21 +1936,11 @@ static void parse_ddi_port(struct drm_i915_private *dev_priv, /* DP max link rate for CNL+ */ if (bdb_version >= 216) { - switch (child->dp_max_link_rate) { - default: - case VBT_DP_MAX_LINK_RATE_HBR3: - info->dp_max_link_rate = 810000; - break; - case VBT_DP_MAX_LINK_RATE_HBR2: - info->dp_max_link_rate = 540000; - break; - case VBT_DP_MAX_LINK_RATE_HBR: - info->dp_max_link_rate = 270000; - break; - case VBT_DP_MAX_LINK_RATE_LBR: - info->dp_max_link_rate = 162000; - break; - } + if (bdb_version >= 230) + parse_bdb_230_dp_max_link_rate(child, info); + else + parse_bdb_216_dp_max_link_rate(child, info); + drm_dbg_kms(&dev_priv->drm, "Port %c VBT DP max link rate: %d\n", port_name(port), info->dp_max_link_rate); diff --git a/drivers/gpu/drm/i915/display/intel_vbt_defs.h b/drivers/gpu/drm/i915/display/intel_vbt_defs.h index 6d10fa037751..0d80b04b34be 100644 --- a/drivers/gpu/drm/i915/display/intel_vbt_defs.h +++ b/drivers/gpu/drm/i915/display/intel_vbt_defs.h @@ -343,10 +343,21 @@ enum vbt_gmbus_ddi { #define DP_AUX_H 0x80 #define DP_AUX_I 0x90 -#define VBT_DP_MAX_LINK_RATE_HBR3 0 -#define VBT_DP_MAX_LINK_RATE_HBR2 1 -#define VBT_DP_MAX_LINK_RATE_HBR 2 -#define VBT_DP_MAX_LINK_RATE_LBR 3 +/* DP max link rate 216+ */ +#define BDB_216_VBT_DP_MAX_LINK_RATE_HBR3 0 +#define BDB_216_VBT_DP_MAX_LINK_RATE_HBR2 1 +#define BDB_216_VBT_DP_MAX_LINK_RATE_HBR 2 +#define BDB_216_VBT_DP_MAX_LINK_RATE_LBR 3 + +/* DP max link rate 230+ */ +#define BDB_230_VBT_DP_MAX_LINK_RATE_DEF 0 +#define BDB_230_VBT_DP_MAX_LINK_RATE_LBR 1 +#define BDB_230_VBT_DP_MAX_LINK_RATE_HBR 2 +#define BDB_230_VBT_DP_MAX_LINK_RATE_HBR2 3 +#define BDB_230_VBT_DP_MAX_LINK_RATE_HBR3 4 +#define BDB_230_VBT_DP_MAX_LINK_RATE_UHBR10 5 +#define BDB_230_VBT_DP_MAX_LINK_RATE_UHBR13P5 6 +#define BDB_230_VBT_DP_MAX_LINK_RATE_UHBR20 7 /* * The child device config, aka the display device data structure, provides a @@ -445,8 +456,8 @@ struct child_device_config { u16 dp_gpio_pin_num; /* 195 */ u8 dp_iboost_level:4; /* 196 */ u8 hdmi_iboost_level:4; /* 196 */ - u8 dp_max_link_rate:2; /* 216 CNL+ */ - u8 dp_max_link_rate_reserved:6; /* 216 */ + u8 dp_max_link_rate:3; /* 230 CNL+ */ + u8 dp_max_link_rate_reserved:5; /* 230 */ } __packed; struct bdb_general_definitions {
According to Bspec #20124, max link rate table for DP was updated at BDB version 230. Max link rate can support upto UHBR. After migrate to BDB v230, the definition for LBR, HBR2 and HBR3 were changed. For backward compatibility. If BDB version was from 216 to 229. Driver have to follow original rule to configure DP max link rate value from VBT. v2: split the mapping table to two for old and new BDB definition. Cc: Ville Syrjala <ville.syrjala@linux.intel.com> Cc: Imre Deak <imre.deak@intel.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Cooper Chiou <cooper.chiou@intel.com> Cc: William Tseng <william.tseng@intel.com> Signed-off-by: Lee Shawn C <shawn.c.lee@intel.com> --- drivers/gpu/drm/i915/display/intel_bios.c | 72 +++++++++++++++---- drivers/gpu/drm/i915/display/intel_vbt_defs.h | 23 ++++-- 2 files changed, 74 insertions(+), 21 deletions(-)