[Intel-xe] [PATCH 21/42] drm/i915/xe2lpd: Add display power well
Matt Roper
matthew.d.roper at intel.com
Wed Aug 23 19:44:53 UTC 2023
On Wed, Aug 23, 2023 at 10:07:19AM -0700, Lucas De Marchi wrote:
> From: Ravi Kumar Vodapalli <ravi.kumar.vodapalli at intel.com>
>
> Add Display Power Well for LNL platform, mostly it is same as MTL
> platform so reused the code
>
> Changes are:
> 1. AUX_CH_CTL and AUX_CH_DATA1 are different from MTL so added extra
> logic xelpdp_aux_power_well_ops functions.
> 2. PGPICA1 contains type-C capable port slices which requires the well
> to power powered up, so added new power well definition for PGPICA1
>
> BSpec: 68886
> Signed-off-by: Ravi Kumar Vodapalli <ravi.kumar.vodapalli at intel.com>
> Signed-off-by: Gustavo Sousa <gustavo.sousa at intel.com>
> Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
> ---
> .../i915/display/intel_display_power_map.c | 36 ++++++++++-
> .../i915/display/intel_display_power_well.c | 63 ++++++++++++++++++-
> .../i915/display/intel_display_power_well.h | 1 +
> .../gpu/drm/i915/display/intel_dp_aux_regs.h | 27 ++++++++
> 4 files changed, 123 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display_power_map.c b/drivers/gpu/drm/i915/display/intel_display_power_map.c
> index 5ad04cd42c15..cef3b313c9f5 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_power_map.c
> +++ b/drivers/gpu/drm/i915/display/intel_display_power_map.c
> @@ -1545,6 +1545,38 @@ static const struct i915_power_well_desc_list xelpdp_power_wells[] = {
> I915_PW_DESCRIPTORS(xelpdp_power_wells_main),
> };
>
> +I915_DECL_PW_DOMAINS(xe2lpd_pwdoms_pica_tc,
> + POWER_DOMAIN_PORT_DDI_LANES_TC1,
> + POWER_DOMAIN_PORT_DDI_LANES_TC2,
> + POWER_DOMAIN_PORT_DDI_LANES_TC3,
> + POWER_DOMAIN_PORT_DDI_LANES_TC4,
> + POWER_DOMAIN_AUX_USBC1,
> + POWER_DOMAIN_AUX_USBC2,
> + POWER_DOMAIN_AUX_USBC3,
> + POWER_DOMAIN_AUX_USBC4,
> + POWER_DOMAIN_AUX_TBT1,
> + POWER_DOMAIN_AUX_TBT2,
> + POWER_DOMAIN_AUX_TBT3,
> + POWER_DOMAIN_AUX_TBT4,
> + POWER_DOMAIN_INIT);
> +
> +static const struct i915_power_well_desc xe2lpd_power_wells_pica[] = {
> + {
> + .instances = &I915_PW_INSTANCES(I915_PW("PICA_TC",
> + &xe2lpd_pwdoms_pica_tc,
> + .id = DISP_PW_ID_NONE),
> + ),
> + .ops = &xe2lpd_pica_power_well_ops,
> + },
> +};
> +
> +static const struct i915_power_well_desc_list xe2lpd_power_wells[] = {
> + I915_PW_DESCRIPTORS(i9xx_power_wells_always_on),
> + I915_PW_DESCRIPTORS(icl_power_wells_pw_1),
> + I915_PW_DESCRIPTORS(xelpdp_power_wells_main),
> + I915_PW_DESCRIPTORS(xe2lpd_power_wells_pica),
> +};
Are we missing a "dc_off" power well here? This patch might have
originally been written before we separated dc_off out from main.
Assuming the DC state requirements are the same for Xe2_LPD as they were
for Xe_LPD and Xe_LPD+ (I haven't checked), then adding
I915_PW_DESCRIPTORS(xelpd_power_wells_dc_off),
immediately before xelpdp_power_wells_main should be sufficient.
> +
> static void init_power_well_domains(const struct i915_power_well_instance *inst,
> struct i915_power_well *power_well)
> {
> @@ -1652,7 +1684,9 @@ int intel_display_power_map_init(struct i915_power_domains *power_domains)
> return 0;
> }
>
> - if (DISPLAY_VER(i915) >= 14)
> + if (DISPLAY_VER(i915) >= 20)
> + return set_power_wells(power_domains, xe2lpd_power_wells);
> + else if (DISPLAY_VER(i915) >= 14)
> return set_power_wells(power_domains, xelpdp_power_wells);
> else if (IS_DG2(i915))
> return set_power_wells(power_domains, xehpd_power_wells);
> diff --git a/drivers/gpu/drm/i915/display/intel_display_power_well.c b/drivers/gpu/drm/i915/display/intel_display_power_well.c
> index 916009894d89..e1fb0bd7b3bf 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_power_well.c
> +++ b/drivers/gpu/drm/i915/display/intel_display_power_well.c
> @@ -1795,7 +1795,11 @@ static void xelpdp_aux_power_well_enable(struct drm_i915_private *dev_priv,
> {
> enum aux_ch aux_ch = i915_power_well_instance(power_well)->xelpdp.aux_ch;
>
> - intel_de_rmw(dev_priv, XELPDP_DP_AUX_CH_CTL(aux_ch),
> + i915_reg_t aux_ch_ctl = DISPLAY_VER(dev_priv) >= 20 ?
> + XE2LPD_DP_AUX_CH_CTL(aux_ch) :
> + XELPDP_DP_AUX_CH_CTL(aux_ch);
> +
> + intel_de_rmw(dev_priv, aux_ch_ctl,
> XELPDP_DP_AUX_CH_CTL_POWER_REQUEST,
> XELPDP_DP_AUX_CH_CTL_POWER_REQUEST);
>
> @@ -1813,7 +1817,11 @@ static void xelpdp_aux_power_well_disable(struct drm_i915_private *dev_priv,
> {
> enum aux_ch aux_ch = i915_power_well_instance(power_well)->xelpdp.aux_ch;
>
> - intel_de_rmw(dev_priv, XELPDP_DP_AUX_CH_CTL(aux_ch),
> + i915_reg_t aux_ch_ctl = DISPLAY_VER(dev_priv) >= 20 ?
> + XE2LPD_DP_AUX_CH_CTL(aux_ch) :
> + XELPDP_DP_AUX_CH_CTL(aux_ch);
> +
> + intel_de_rmw(dev_priv, aux_ch_ctl,
> XELPDP_DP_AUX_CH_CTL_POWER_REQUEST,
> 0);
> usleep_range(10, 30);
> @@ -1823,11 +1831,53 @@ static bool xelpdp_aux_power_well_enabled(struct drm_i915_private *dev_priv,
> struct i915_power_well *power_well)
> {
> enum aux_ch aux_ch = i915_power_well_instance(power_well)->xelpdp.aux_ch;
> + i915_reg_t aux_ch_ctl;
>
> - return intel_de_read(dev_priv, XELPDP_DP_AUX_CH_CTL(aux_ch)) &
> + aux_ch_ctl = DISPLAY_VER(dev_priv) >= 20 ?
> + XE2LPD_DP_AUX_CH_CTL(aux_ch) :
> + XELPDP_DP_AUX_CH_CTL(aux_ch);
> +
> + return intel_de_read(dev_priv, aux_ch_ctl) &
> XELPDP_DP_AUX_CH_CTL_POWER_STATUS;
> }
>
> +static void xe2lpd_pica_power_well_enable(struct drm_i915_private *dev_priv,
> + struct i915_power_well *power_well)
> +{
> + intel_de_rmw(dev_priv, XE2LPD_PICA_PW_CTL,
> + XE2LPD_PICA_CTL_POWER_REQUEST,
> + XE2LPD_PICA_CTL_POWER_REQUEST);
> +
> + if (intel_de_wait_for_set(dev_priv, XE2LPD_PICA_PW_CTL,
> + XE2LPD_PICA_CTL_POWER_STATUS, 1)) {
> + drm_dbg_kms(&dev_priv->drm, "pica power well enable timeout\n");
> +
> + drm_WARN(&dev_priv->drm, 1, "Power well PICA timeout when enabled");
> + }
> +}
> +
> +static void xe2lpd_pica_power_well_disable(struct drm_i915_private *dev_priv,
> + struct i915_power_well *power_well)
> +{
> + intel_de_rmw(dev_priv, XE2LPD_PICA_PW_CTL,
> + XE2LPD_PICA_CTL_POWER_REQUEST,
> + 0);
> +
> + if (intel_de_wait_for_clear(dev_priv, XE2LPD_PICA_PW_CTL,
> + XE2LPD_PICA_CTL_POWER_STATUS, 1)) {
> + drm_dbg_kms(&dev_priv->drm, "pica power well disable timeout\n");
> +
> + drm_WARN(&dev_priv->drm, 1, "Power well PICA timeout when disabled");
> + }
> +}
> +
> +static bool xe2lpd_pica_power_well_enabled(struct drm_i915_private *dev_priv,
> + struct i915_power_well *power_well)
> +{
> + return intel_de_read(dev_priv, XE2LPD_PICA_PW_CTL) &
> + XE2LPD_PICA_CTL_POWER_STATUS;
> +}
> +
> const struct i915_power_well_ops i9xx_always_on_power_well_ops = {
> .sync_hw = i9xx_power_well_sync_hw_noop,
> .enable = i9xx_always_on_power_well_noop,
> @@ -1947,3 +1997,10 @@ const struct i915_power_well_ops xelpdp_aux_power_well_ops = {
> .disable = xelpdp_aux_power_well_disable,
> .is_enabled = xelpdp_aux_power_well_enabled,
> };
> +
> +const struct i915_power_well_ops xe2lpd_pica_power_well_ops = {
> + .sync_hw = i9xx_power_well_sync_hw_noop,
> + .enable = xe2lpd_pica_power_well_enable,
> + .disable = xe2lpd_pica_power_well_disable,
> + .is_enabled = xe2lpd_pica_power_well_enabled,
> +};
> diff --git a/drivers/gpu/drm/i915/display/intel_display_power_well.h b/drivers/gpu/drm/i915/display/intel_display_power_well.h
> index a8736588314d..9357a9a73c06 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_power_well.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_power_well.h
> @@ -176,5 +176,6 @@ extern const struct i915_power_well_ops icl_aux_power_well_ops;
> extern const struct i915_power_well_ops icl_ddi_power_well_ops;
> extern const struct i915_power_well_ops tgl_tc_cold_off_ops;
> extern const struct i915_power_well_ops xelpdp_aux_power_well_ops;
> +extern const struct i915_power_well_ops xe2lpd_pica_power_well_ops;
>
> #endif
> diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux_regs.h b/drivers/gpu/drm/i915/display/intel_dp_aux_regs.h
> index 5185345277c7..d855f3730381 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp_aux_regs.h
> +++ b/drivers/gpu/drm/i915/display/intel_dp_aux_regs.h
> @@ -83,4 +83,31 @@
> #define DP_AUX_CH_CTL_SYNC_PULSE_SKL_MASK REG_GENMASK(4, 0) /* skl+ */
> #define DP_AUX_CH_CTL_SYNC_PULSE_SKL(c) REG_FIELD_PREP(DP_AUX_CH_CTL_SYNC_PULSE_SKL_MASK, (c) - 1)
>
> +#define _XE2LPD_DPA_AUX_CH_CTL 0x16FA10
> +#define _XE2LPD_DPB_AUX_CH_CTL 0x16FC10
> +#define _XE2LPD_DPA_AUX_CH_DATA1 0x16FA14
> +#define _XE2LPD_DPB_AUX_CH_DATA1 0x16FC14
We're generally trying to standardize on lowercase hex for register
offsets these days.
> +#define XE2LPD_DP_AUX_CH_CTL(aux_ch) _MMIO(_PICK(aux_ch, \
> + _XE2LPD_DPA_AUX_CH_CTL, \
> + _XE2LPD_DPB_AUX_CH_CTL, \
> + 0, /* port/aux_ch C is non-existent */ \
> + _XELPDP_USBC1_AUX_CH_CTL, \
> + _XELPDP_USBC2_AUX_CH_CTL, \
> + _XELPDP_USBC3_AUX_CH_CTL, \
> + _XELPDP_USBC4_AUX_CH_CTL))
> +#define XE2LPD_DP_AUX_CH_DATA(aux_ch, i) _MMIO(_PICK(aux_ch, \
> + _XE2LPD_DPA_AUX_CH_DATA1, \
> + _XE2LPD_DPB_AUX_CH_DATA1, \
> + 0, /* port/aux_ch C is non-existent */ \
> + _XELPDP_USBC1_AUX_CH_DATA1, \
> + _XELPDP_USBC2_AUX_CH_DATA1, \
> + _XELPDP_USBC3_AUX_CH_DATA1, \
> + _XELPDP_USBC4_AUX_CH_DATA1) + (i) * 4)
It looks like these PICA registers are following the same general layout
change as the ones we modified a couple patches ago ("drm/i915/xe2lpd:
Move registers to PICA"). We should probably handle these the same way
for consistency (or maybe even squash the register movement here into
that previous patch?).
> +
> +/* PICA Power Well Control register for Xe2 platforms*/
> +#define XE2LPD_PICA_PW_CTL _MMIO(0x16FE04)
> +
Unwanted blank line?
Matt
> +#define XE2LPD_PICA_CTL_POWER_REQUEST BIT(31)
> +#define XE2LPD_PICA_CTL_POWER_STATUS BIT(30)
> +
> #endif /* __INTEL_DP_AUX_REGS_H__ */
> --
> 2.40.1
>
--
Matt Roper
Graphics Software Engineer
Linux GPU Platform Enablement
Intel Corporation
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