On Thu, Apr 13, 2017 at 09:13:02AM -0700, Rodrigo Vivi wrote:
> From: Ville Syrjälä <ville.syrj...@linux.intel.com>
>
> Implement the CNL display init/uninit sequence as outlined in Bspec.
>
> Quite similar to SKL/BXT. The main complicaiton is probably the extra
> procmon setup we must do based on the process/voltage information we
> can read out from some register.
>
> For now we assume DMC will handle the AUX wells, and we'll just enable
> all of them during the init sequence. Even if DMC will handle them, we
> should perhaps trim the set of enabled wells based on which DDI ports
> are actually present.
The above needs to be aligned with the current version of the code.
Yes, looks like DMC saves/restores the state of both AUX and DDI power
wells. The spec says to enable the AUX wells during init, but I think
it's ok to do this on-demand.
>
> v2: s/skl_dbuf/gen9_dbuf/ to follow upstream
> bxt needed a cdclk sanitize step, so let's add it for cnl too
> v3: s/CHICKEN_MISC_1/CHICKEN_MISC_2/ (Ander)
> v4: Rebased by Rodrigo after Ville's cdclk rework
> v5: Removed unecessary Aux IO forced enable/disable, Fix DW10 setup
> Fix procpon Mask. (Credits-to Paulo and Clint)
> Remove A0 workaround.
> v6: Rebased on top of recent code (Rodrigo).
> v7: Respect the order of sanitize_ after set_
> (Done by Rodrigo, Requested by Ville)
> v8: (Rodrigo) Remove CHICKEN_MISC_2 double definition.
>
> Cc: Paulo Zanoni <paulo.r.zan...@intel.com>
> Cc: Clint Taylor <clinton.a.tay...@intel.com>
> Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
> Signed-off-by: Rodrigo Vivi <rodrigo.v...@intel.com>
> ---
> drivers/gpu/drm/i915/i915_reg.h | 23 +++++++
> drivers/gpu/drm/i915/intel_cdclk.c | 108 ++++++++++++++++++++++++++++++
> drivers/gpu/drm/i915/intel_drv.h | 2 +
> drivers/gpu/drm/i915/intel_runtime_pm.c | 113
> +++++++++++++++++++++++++++++++-
> 4 files changed, 244 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 8353892..9b2d8c0 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -1655,6 +1655,9 @@ enum skl_disp_power_wells {
> #define PHY_RESERVED (1 << 7)
> #define BXT_PORT_CL1CM_DW0(phy) _BXT_PHY((phy),
> _PORT_CL1CM_DW0_BC)
>
> +#define CNL_PORT_CL1CM_DW5 _MMIO(0x162014)
> +#define CL_POWER_DOWN_ENABLE (1 << 4)
> +
> #define _PORT_CL1CM_DW9_A 0x162024
> #define _PORT_CL1CM_DW9_BC 0x6C024
> #define IREF0RC_OFFSET_SHIFT 8
> @@ -1687,6 +1690,25 @@ enum skl_disp_power_wells {
> #define BXT_PORT_CL2CM_DW6(phy) _BXT_PHY((phy),
> _PORT_CL2CM_DW6_BC)
> #define DW6_OLDO_DYN_PWR_DOWN_EN (1 << 28)
>
> +#define CNL_PORT_COMP_DW0 _MMIO(0x162100)
> +#define COMP_INIT (1 << 31)
> +#define CNL_PORT_COMP_DW1 _MMIO(0x162104)
> +#define CNL_PORT_COMP_DW3 _MMIO(0x16210c)
> +#define PROCESS_INFO_DOT_0 (0 << 26)
> +#define PROCESS_INFO_DOT_1 (1 << 26)
> +#define PROCESS_INFO_DOT_4 (2 << 26)
> +#define PROCESS_INFO_MASK (7 << 26)
> +#define PROCESS_INFO_SHIFT 26
> +#define VOLTAGE_INFO_0_85V (0 << 24)
> +#define VOLTAGE_INFO_0_95V (1 << 24)
> +#define VOLTAGE_INFO_1_05V (2 << 24)
> +#define VOLTAGE_INFO_MASK (3 << 24)
> +#define VOLTAGE_INFO_SHIFT 24
> +#define CNL_PORT_COMP_DW8 _MMIO(0x162120)
> +#define PRDIC_ICOMP_DIS (1 << 14)
DW8 looks to be unused.
> +#define CNL_PORT_COMP_DW9 _MMIO(0x162124)
> +#define CNL_PORT_COMP_DW10 _MMIO(0x162128)
> +
> /* BXT PHY Ref registers */
> #define _PORT_REF_DW3_A 0x16218C
> #define _PORT_REF_DW3_BC 0x6C18C
> @@ -6513,6 +6535,7 @@ enum {
> #define KVM_CONFIG_CHANGE_NOTIFICATION_SELECT (1 << 14)
>
> #define CHICKEN_MISC_2 _MMIO(0x42084)
> +#define COMP_PWR_DOWN (1 << 23)
> #define GLK_CL0_PWR_DOWN (1 << 10)
> #define GLK_CL1_PWR_DOWN (1 << 11)
> #define GLK_CL2_PWR_DOWN (1 << 12)
> diff --git a/drivers/gpu/drm/i915/intel_cdclk.c
> b/drivers/gpu/drm/i915/intel_cdclk.c
> index bee4394..f9ba1e7 100644
> --- a/drivers/gpu/drm/i915/intel_cdclk.c
> +++ b/drivers/gpu/drm/i915/intel_cdclk.c
> @@ -1555,6 +1555,114 @@ static void cnl_set_cdclk(struct drm_i915_private
> *dev_priv,
> intel_update_cdclk(dev_priv);
> }
>
> +static int cnl_cdclk_pll_vco(struct drm_i915_private *dev_priv, int cdclk)
> +{
> + int ratio;
> +
> + if (cdclk == dev_priv->cdclk.hw.ref)
> + return 0;
> +
> + switch (cdclk) {
> + default:
> + MISSING_CASE(cdclk);
> + case 168000:
> + case 336000:
> + ratio = dev_priv->cdclk.hw.ref == 19200 ? 35 : 28;
> + break;
> + case 528000:
> + ratio = dev_priv->cdclk.hw.ref == 19200 ? 55 : 44;
> + break;
> + }
> +
> + return dev_priv->cdclk.hw.ref * ratio;
> +}
> +
> +static void cnl_sanitize_cdclk(struct drm_i915_private *dev_priv)
> +{
> + u32 cdctl, expected;
> +
> + intel_update_cdclk(dev_priv);
> +
> + if (dev_priv->cdclk.hw.vco == 0 ||
> + dev_priv->cdclk.hw.cdclk == dev_priv->cdclk.hw.ref)
> + goto sanitize;
> +
> + /* DPLL okay; verify the cdclock
> + *
> + * Some BIOS versions leave an incorrect decimal frequency value and
> + * set reserved MBZ bits in CDCLK_CTL at least during exiting from S4,
> + * so sanitize this register.
> + */
> + cdctl = I915_READ(CDCLK_CTL);
> + /*
> + * Let's ignore the pipe field, since BIOS could have configured the
> + * dividers both synching to an active pipe, or asynchronously
> + * (PIPE_NONE).
> + */
> + cdctl &= ~BXT_CDCLK_CD2X_PIPE_NONE;
> +
> + expected = (cdctl & BXT_CDCLK_CD2X_DIV_SEL_MASK) |
> + skl_cdclk_decimal(dev_priv->cdclk.hw.cdclk);
> +
> + if (cdctl == expected)
> + /* All well; nothing to sanitize */
> + return;
> +
> +sanitize:
> + DRM_DEBUG_KMS("Sanitizing cdclk programmed by pre-os\n");
> +
> + /* force cdclk programming */
> + dev_priv->cdclk.hw.cdclk = 0;
> +
> + /* force full PLL disable + enable */
> + dev_priv->cdclk.hw.vco = -1;
> +}
> +
> +/**
> + * cnl_init_cdclk - Initialize CDCLK on CNL
> + * @dev_priv: i915 device
> + *
> + * Initialize CDCLK for CNL. This is generally
> + * done only during the display core initialization sequence,
> + * after which the DMC will take care of turning CDCLK off/on
> + * as needed.
> + */
> +
Extra w/s.
Looks ok:
Reviewed-by: Imre Deak <imre.d...@intel.com>
> +void cnl_init_cdclk(struct drm_i915_private *dev_priv)
> +{
> + struct intel_cdclk_state cdclk_state;
> +
> + cnl_sanitize_cdclk(dev_priv);
> +
> + if (dev_priv->cdclk.hw.cdclk != 0 &&
> + dev_priv->cdclk.hw.vco != 0)
> + return;
> +
> + cdclk_state = dev_priv->cdclk.hw;
> +
> + cdclk_state.cdclk = 168000;
> + cdclk_state.vco = cnl_cdclk_pll_vco(dev_priv, cdclk_state.cdclk);
> +
> + cnl_set_cdclk(dev_priv, &cdclk_state);
> +}
> +
> +/**
> + * cnl_uninit_cdclk - Uninitialize CDCLK on CNL
> + * @dev_priv: i915 device
> + *
> + * Uninitialize CDCLK for CNL. This is done only
> + * during the display core uninitialization sequence.
> + */
> +void cnl_uninit_cdclk(struct drm_i915_private *dev_priv)
> +{
> + struct intel_cdclk_state cdclk_state = dev_priv->cdclk.hw;
> +
> + cdclk_state.cdclk = cdclk_state.ref;
> + cdclk_state.vco = 0;
> +
> + cnl_set_cdclk(dev_priv, &cdclk_state);
> +}
> +
> /**
> * intel_cdclk_state_compare - Determine if two CDCLK states differ
> * @a: first CDCLK state
> diff --git a/drivers/gpu/drm/i915/intel_drv.h
> b/drivers/gpu/drm/i915/intel_drv.h
> index 7bc0c25..a526e6e 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -1280,6 +1280,8 @@ void intel_audio_codec_enable(struct intel_encoder
> *encoder,
> /* intel_cdclk.c */
> void skl_init_cdclk(struct drm_i915_private *dev_priv);
> void skl_uninit_cdclk(struct drm_i915_private *dev_priv);
> +void cnl_init_cdclk(struct drm_i915_private *dev_priv);
> +void cnl_uninit_cdclk(struct drm_i915_private *dev_priv);
> void bxt_init_cdclk(struct drm_i915_private *dev_priv);
> void bxt_uninit_cdclk(struct drm_i915_private *dev_priv);
> void intel_init_cdclk_hooks(struct drm_i915_private *dev_priv);
> diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c
> b/drivers/gpu/drm/i915/intel_runtime_pm.c
> index 1797c91..5c3c6ec 100644
> --- a/drivers/gpu/drm/i915/intel_runtime_pm.c
> +++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
> @@ -2698,6 +2698,111 @@ void bxt_display_core_uninit(struct drm_i915_private
> *dev_priv)
> mutex_unlock(&power_domains->lock);
> }
>
> +#define CNL_PROCMON_IDX(val) \
> + (((val) & (PROCESS_INFO_MASK | VOLTAGE_INFO_MASK)) >>
> VOLTAGE_INFO_SHIFT)
> +#define NUM_CNL_PROCMON \
> + (CNL_PROCMON_IDX(VOLTAGE_INFO_MASK | PROCESS_INFO_MASK) + 1)
> +
> +static const struct cnl_procmon {
> + u32 dw1, dw9, dw10;
> +} cnl_procmon_values[NUM_CNL_PROCMON] = {
> + [CNL_PROCMON_IDX(VOLTAGE_INFO_0_85V | PROCESS_INFO_DOT_0)] =
> + { .dw1 = 0x00 << 16, .dw9 = 0x62AB67BB, .dw10 = 0x51914F96, },
> + [CNL_PROCMON_IDX(VOLTAGE_INFO_0_95V | PROCESS_INFO_DOT_0)] =
> + { .dw1 = 0x00 << 16, .dw9 = 0x86E172C7, .dw10 = 0x77CA5EAB, },
> + [CNL_PROCMON_IDX(VOLTAGE_INFO_0_95V | PROCESS_INFO_DOT_1)] =
> + { .dw1 = 0x00 << 16, .dw9 = 0x93F87FE1, .dw10 = 0x8AE871C5, },
> + [CNL_PROCMON_IDX(VOLTAGE_INFO_1_05V | PROCESS_INFO_DOT_0)] =
> + { .dw1 = 0x00 << 16, .dw9 = 0x98FA82DD, .dw10 = 0x89E46DC1, },
> + [CNL_PROCMON_IDX(VOLTAGE_INFO_1_05V | PROCESS_INFO_DOT_1)] =
> + { .dw1 = 0x44 << 16, .dw9 = 0x9A00AB25, .dw10 = 0x8AE38FF1, },
> +};
> +
> +static void cnl_display_core_init(struct drm_i915_private *dev_priv, bool
> resume)
> +{
> + struct i915_power_domains *power_domains = &dev_priv->power_domains;
> + const struct cnl_procmon *procmon;
> + struct i915_power_well *well;
> + u32 val;
> +
> + gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
> +
> + /* 1. Enable PCH Reset Handshake */
> + val = I915_READ(HSW_NDE_RSTWRN_OPT);
> + val |= RESET_PCH_HANDSHAKE_ENABLE;
> + I915_WRITE(HSW_NDE_RSTWRN_OPT, val);
> +
> + /* 2. Enable Comp */
> + val = I915_READ(CHICKEN_MISC_2);
> + val &= ~COMP_PWR_DOWN;
> + I915_WRITE(CHICKEN_MISC_2, val);
> +
> + val = I915_READ(CNL_PORT_COMP_DW3);
> + procmon = &cnl_procmon_values[CNL_PROCMON_IDX(val)];
> +
> + WARN_ON(procmon->dw10 == 0);
> +
> + val = I915_READ(CNL_PORT_COMP_DW1);
> + val &= ~((0xff << 16) | 0xff);
> + val |= procmon->dw1;
> + I915_WRITE(CNL_PORT_COMP_DW1, val);
> +
> + I915_WRITE(CNL_PORT_COMP_DW9, procmon->dw9);
> + I915_WRITE(CNL_PORT_COMP_DW10, procmon->dw10);
> +
> + val = I915_READ(CNL_PORT_COMP_DW0);
> + val |= COMP_INIT;
> + I915_WRITE(CNL_PORT_COMP_DW0, val);
> +
> + /* 3. */
> + val = I915_READ(CNL_PORT_CL1CM_DW5);
> + val |= CL_POWER_DOWN_ENABLE;
> + I915_WRITE(CNL_PORT_CL1CM_DW5, val);
> +
> + /* 4. Enable Power Well 1 (PG1) and Aux IO Power */
> + mutex_lock(&power_domains->lock);
> + well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
> + intel_power_well_enable(dev_priv, well);
> + mutex_unlock(&power_domains->lock);
> +
> + /* 5. Enable CD clock */
> + cnl_init_cdclk(dev_priv);
> +
> + /* 6. Enable DBUF */
> + gen9_dbuf_enable(dev_priv);
> +}
> +
> +#undef CNL_PROCMON_IDX
> +#undef NUM_CNL_PROCMON
> +
> +static void cnl_display_core_uninit(struct drm_i915_private *dev_priv)
> +{
> + struct i915_power_domains *power_domains = &dev_priv->power_domains;
> + struct i915_power_well *well;
> + u32 val;
> +
> + gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
> +
> + /* 1. Disable all display engine functions -> aready done */
> +
> + /* 2. Disable DBUF */
> + gen9_dbuf_disable(dev_priv);
> +
> + /* 3. Disable CD clock */
> + cnl_uninit_cdclk(dev_priv);
> +
> + /* 4. Disable Power Well 1 (PG1) and Aux IO Power */
> + mutex_lock(&power_domains->lock);
> + well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
> + intel_power_well_disable(dev_priv, well);
> + mutex_unlock(&power_domains->lock);
> +
> + /* 5. Disable Comp */
> + val = I915_READ(CHICKEN_MISC_2);
> + val |= COMP_PWR_DOWN;
> + I915_WRITE(CHICKEN_MISC_2, val);
> +}
> +
> static void chv_phy_control_init(struct drm_i915_private *dev_priv)
> {
> struct i915_power_well *cmn_bc =
> @@ -2830,7 +2935,9 @@ void intel_power_domains_init_hw(struct
> drm_i915_private *dev_priv, bool resume)
>
> power_domains->initializing = true;
>
> - if (IS_GEN9_BC(dev_priv)) {
> + if (IS_CANNONLAKE(dev_priv)) {
> + cnl_display_core_init(dev_priv, resume);
> + } else if (IS_GEN9_BC(dev_priv)) {
> skl_display_core_init(dev_priv, resume);
> } else if (IS_GEN9_LP(dev_priv)) {
> bxt_display_core_init(dev_priv, resume);
> @@ -2869,7 +2976,9 @@ void intel_power_domains_suspend(struct
> drm_i915_private *dev_priv)
> if (!i915.disable_power_well)
> intel_display_power_put(dev_priv, POWER_DOMAIN_INIT);
>
> - if (IS_GEN9_BC(dev_priv))
> + if (IS_CANNONLAKE(dev_priv))
> + cnl_display_core_uninit(dev_priv);
> + else if (IS_GEN9_BC(dev_priv))
> skl_display_core_uninit(dev_priv);
> else if (IS_GEN9_LP(dev_priv))
> bxt_display_core_uninit(dev_priv);
> --
> 1.9.1
>
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