[Intel-gfx] [PATCH v2 40/50] drm/i915/adl_p: Add PLL Support
Imre Deak
imre.deak at intel.com
Fri Mar 26 16:25:50 UTC 2021
On Thu, Mar 25, 2021 at 11:07:10AM -0700, Matt Roper wrote:
> From: Anusha Srivatsa <anusha.srivatsa at intel.com>
>
> The clocks in ALD_P is similar to that of TGL.
> The combo PLLs use the same DPLL0, DPLL1 and TBT_PLL.
>
> This patch adds the helper function intel_mg_pll_enable_reg()
> which is similar to intel_combo_pll_enable_reg() for being lookup
> place for PLL_ENABLE register in combo phy cases.
On TypeC DDIs in dp-alt and legacy mode the DDI_BUF_CTL 'Phy link rate'
field must be also set according to crtc_state->port_clock (in
intel_ddi_init_dp_buf_reg()), see bspec 49533.
> Bspec: 55409,55316
> Cc: Matt Roper <matthew.d.roper at intel.com>
> Cc: Clinton Taylor <clinton.a.taylor at intel.com>
> Cc: Lucas De Marchi <lucas.demarchi at intel.com>
> Cc: José Roberto de Souza <jose.souza at intel.com>
> Signed-off-by: Anusha Srivatsa <anusha.srivatsa at intel.com>
> Signed-off-by: Clinton Taylor <Clinton.A.Taylor at intel.com>
> Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
> ---
> drivers/gpu/drm/i915/display/intel_dpll_mgr.c | 69 ++++++++++++++-----
> drivers/gpu/drm/i915/i915_reg.h | 8 +++
> 2 files changed, 60 insertions(+), 17 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_dpll_mgr.c b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
> index 268ecf1c000f..618c61d4d3b6 100644
> --- a/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
> +++ b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
> @@ -147,6 +147,16 @@ void assert_shared_dpll(struct drm_i915_private *dev_priv,
> pll->info->name, onoff(state), onoff(cur_state));
> }
>
> +static enum tc_port icl_pll_id_to_tc_port(enum intel_dpll_id id)
> +{
> + return TC_PORT_1 + id - DPLL_ID_ICL_MGPLL1;
> +}
> +
> +enum intel_dpll_id icl_tc_port_to_pll_id(enum tc_port tc_port)
> +{
> + return tc_port - TC_PORT_1 + DPLL_ID_ICL_MGPLL1;
> +}
> +
> static i915_reg_t
> intel_combo_pll_enable_reg(struct drm_i915_private *i915,
> struct intel_shared_dpll *pll)
> @@ -159,6 +169,19 @@ intel_combo_pll_enable_reg(struct drm_i915_private *i915,
> return CNL_DPLL_ENABLE(pll->info->id);
> }
>
> +static i915_reg_t
> +intel_tc_pll_enable_reg(struct drm_i915_private *i915,
> + struct intel_shared_dpll *pll)
> +{
> + const enum intel_dpll_id id = pll->info->id;
> + enum tc_port tc_port = icl_pll_id_to_tc_port(id);
> +
> + if (IS_ALDERLAKE_P(i915))
> + return ADLP_PORTTC_PLL_ENABLE(tc_port);
> +
> + return MG_PLL_ENABLE(tc_port);
> +}
> +
> /**
> * intel_prepare_shared_dpll - call a dpll's prepare hook
> * @crtc_state: CRTC, and its state, which has a shared dpll
> @@ -3118,16 +3141,6 @@ static void icl_calc_dpll_state(struct drm_i915_private *i915,
> pll_state->cfgcr1 |= DPLL_CFGCR1_CENTRAL_FREQ_8400;
> }
>
> -static enum tc_port icl_pll_id_to_tc_port(enum intel_dpll_id id)
> -{
> - return id - DPLL_ID_ICL_MGPLL1;
> -}
> -
> -enum intel_dpll_id icl_tc_port_to_pll_id(enum tc_port tc_port)
> -{
> - return tc_port + DPLL_ID_ICL_MGPLL1;
> -}
> -
> static bool icl_mg_pll_find_divisors(int clock_khz, bool is_dp, bool use_ssc,
> u32 *target_dco_khz,
> struct intel_dpll_hw_state *state,
> @@ -3726,12 +3739,14 @@ static bool mg_pll_get_hw_state(struct drm_i915_private *dev_priv,
> bool ret = false;
> u32 val;
>
> + i915_reg_t enable_reg = intel_tc_pll_enable_reg(dev_priv, pll);
> +
> wakeref = intel_display_power_get_if_enabled(dev_priv,
> POWER_DOMAIN_DISPLAY_CORE);
> if (!wakeref)
> return false;
>
> - val = intel_de_read(dev_priv, MG_PLL_ENABLE(tc_port));
> + val = intel_de_read(dev_priv, enable_reg);
> if (!(val & PLL_ENABLE))
> goto out;
>
> @@ -3795,7 +3810,7 @@ static bool dkl_pll_get_hw_state(struct drm_i915_private *dev_priv,
> if (!wakeref)
> return false;
>
> - val = intel_de_read(dev_priv, MG_PLL_ENABLE(tc_port));
> + val = intel_de_read(dev_priv, intel_tc_pll_enable_reg(dev_priv, pll));
> if (!(val & PLL_ENABLE))
> goto out;
>
> @@ -4167,8 +4182,7 @@ static void tbt_pll_enable(struct drm_i915_private *dev_priv,
> static void mg_pll_enable(struct drm_i915_private *dev_priv,
> struct intel_shared_dpll *pll)
> {
> - i915_reg_t enable_reg =
> - MG_PLL_ENABLE(icl_pll_id_to_tc_port(pll->info->id));
> + i915_reg_t enable_reg = intel_tc_pll_enable_reg(dev_priv, pll);
>
> icl_pll_power_enable(dev_priv, pll, enable_reg);
>
> @@ -4247,8 +4261,7 @@ static void tbt_pll_disable(struct drm_i915_private *dev_priv,
> static void mg_pll_disable(struct drm_i915_private *dev_priv,
> struct intel_shared_dpll *pll)
> {
> - i915_reg_t enable_reg =
> - MG_PLL_ENABLE(icl_pll_id_to_tc_port(pll->info->id));
> + i915_reg_t enable_reg = intel_tc_pll_enable_reg(dev_priv, pll);
>
> icl_pll_disable(dev_priv, pll, enable_reg);
> }
> @@ -4414,6 +4427,26 @@ static const struct intel_dpll_mgr adls_pll_mgr = {
> .dump_hw_state = icl_dump_hw_state,
> };
>
> +static const struct dpll_info adlp_plls[] = {
> + { "DPLL 0", &combo_pll_funcs, DPLL_ID_ICL_DPLL0, 0 },
> + { "DPLL 1", &combo_pll_funcs, DPLL_ID_ICL_DPLL1, 0 },
> + { "TBT PLL", &tbt_pll_funcs, DPLL_ID_ICL_TBTPLL, 0 },
> + { "TC PLL 1", &dkl_pll_funcs, DPLL_ID_ICL_MGPLL1, 0 },
> + { "TC PLL 2", &dkl_pll_funcs, DPLL_ID_ICL_MGPLL2, 0 },
> + { "TC PLL 3", &dkl_pll_funcs, DPLL_ID_ICL_MGPLL3, 0 },
> + { "TC PLL 4", &dkl_pll_funcs, DPLL_ID_ICL_MGPLL4, 0 },
> + { },
> +};
> +
> +static const struct intel_dpll_mgr adlp_pll_mgr = {
> + .dpll_info = adlp_plls,
> + .get_dplls = icl_get_dplls,
> + .put_dplls = icl_put_dplls,
> + .update_active_dpll = icl_update_active_dpll,
> + .update_ref_clks = icl_update_dpll_ref_clks,
> + .dump_hw_state = icl_dump_hw_state,
> +};
> +
> /**
> * intel_shared_dpll_init - Initialize shared DPLLs
> * @dev: drm device
> @@ -4427,7 +4460,9 @@ void intel_shared_dpll_init(struct drm_device *dev)
> const struct dpll_info *dpll_info;
> int i;
>
> - if (IS_ALDERLAKE_S(dev_priv))
> + if (IS_ALDERLAKE_P(dev_priv))
> + dpll_mgr = &adlp_pll_mgr;
> + else if (IS_ALDERLAKE_S(dev_priv))
> dpll_mgr = &adls_pll_mgr;
> else if (IS_DG1(dev_priv))
> dpll_mgr = &dg1_pll_mgr;
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 393071cde6d4..017bd4817c5b 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -10539,6 +10539,14 @@ enum skl_power_gate {
> #define DG1_DPLL_ENABLE(pll) _MMIO_PLL3(pll, DPLL0_ENABLE, DPLL1_ENABLE, \
> _MG_PLL1_ENABLE, _MG_PLL2_ENABLE)
>
> +/* ADL-P Type C PLL */
> +#define PORTTC1_PLL_ENABLE 0x46038
> +#define PORTTC2_PLL_ENABLE 0x46040
> +
> +#define ADLP_PORTTC_PLL_ENABLE(tc_port) _MMIO_PORT((tc_port), \
> + PORTTC1_PLL_ENABLE, \
> + PORTTC2_PLL_ENABLE)
> +
> #define _MG_REFCLKIN_CTL_PORT1 0x16892C
> #define _MG_REFCLKIN_CTL_PORT2 0x16992C
> #define _MG_REFCLKIN_CTL_PORT3 0x16A92C
> --
> 2.25.4
>
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