From 51c83cfaf96382ab65717d694f80af86482ba795 Mon Sep 17 00:00:00 2001 From: Manasi Navare Date: Wed, 23 May 2018 15:44:44 -0700 Subject: [PATCH] drm/i915/icl: Get DDI clock for ICL based on PLLs. PLLs are the source clocks for the DDIs so in order to determine the ddi clock we need to check the PLL configuration. This gets a little tricky for ICL since there is no register bit that maps directly to the link clock. So this patch creates a separate function in intel_dpll_mgr.c to obtain the write array PLL Params and compares the set pll_params with the table to get the corresponding link clock. v2: - Fix the encoder type check (DK). - Improve our error checking, return a sane value (Mika, Paulo). - Fix table entries (Paulo). Cc: Rodrigo Vivi Cc: Mika Kahola Cc: Paulo Zanoni Cc: Dhinakaran Pandiyan Reviewed-by: Mika Kahola Signed-off-by: Manasi Navare Signed-off-by: Lucas De Marchi [Paulo: implement v2] Signed-off-by: Paulo Zanoni Link: https://patchwork.freedesktop.org/patch/msgid/20180523224444.19017-1-paulo.r.zanoni@intel.com --- drivers/gpu/drm/i915/i915_reg.h | 3 ++ drivers/gpu/drm/i915/intel_ddi.c | 26 ++++++++++ drivers/gpu/drm/i915/intel_dpll_mgr.c | 70 +++++++++++++++++++++++++++ drivers/gpu/drm/i915/intel_dpll_mgr.h | 2 + 4 files changed, 101 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 5866b7d0ad81..f0317bde3aab 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -9127,13 +9127,16 @@ enum skl_power_gate { #define DPLL_CFGCR1_QDIV_RATIO_MASK (0xff << 10) #define DPLL_CFGCR1_QDIV_RATIO_SHIFT (10) #define DPLL_CFGCR1_QDIV_RATIO(x) ((x) << 10) +#define DPLL_CFGCR1_QDIV_MODE_SHIFT (9) #define DPLL_CFGCR1_QDIV_MODE(x) ((x) << 9) #define DPLL_CFGCR1_KDIV_MASK (7 << 6) +#define DPLL_CFGCR1_KDIV_SHIFT (6) #define DPLL_CFGCR1_KDIV(x) ((x) << 6) #define DPLL_CFGCR1_KDIV_1 (1 << 6) #define DPLL_CFGCR1_KDIV_2 (2 << 6) #define DPLL_CFGCR1_KDIV_4 (4 << 6) #define DPLL_CFGCR1_PDIV_MASK (0xf << 2) +#define DPLL_CFGCR1_PDIV_SHIFT (2) #define DPLL_CFGCR1_PDIV(x) ((x) << 2) #define DPLL_CFGCR1_PDIV_2 (1 << 2) #define DPLL_CFGCR1_PDIV_3 (2 << 2) diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c index c33b19705e39..3f042c505430 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -1422,6 +1422,30 @@ static void ddi_dotclock_get(struct intel_crtc_state *pipe_config) pipe_config->base.adjusted_mode.crtc_clock = dotclock; } +static void icl_ddi_clock_get(struct intel_encoder *encoder, + struct intel_crtc_state *pipe_config) +{ + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); + enum port port = encoder->port; + int link_clock = 0; + uint32_t pll_id; + + pll_id = intel_get_shared_dpll_id(dev_priv, pipe_config->shared_dpll); + if (port == PORT_A || port == PORT_B) { + if (intel_crtc_has_type(pipe_config, INTEL_OUTPUT_HDMI)) + link_clock = cnl_calc_wrpll_link(dev_priv, pll_id); + else + link_clock = icl_calc_dp_combo_pll_link(dev_priv, + pll_id); + } else { + /* FIXME - Add for MG PLL */ + WARN(1, "MG PLL clock_get code not implemented yet\n"); + } + + pipe_config->port_clock = link_clock; + ddi_dotclock_get(pipe_config); +} + static void cnl_ddi_clock_get(struct intel_encoder *encoder, struct intel_crtc_state *pipe_config) { @@ -1615,6 +1639,8 @@ static void intel_ddi_clock_get(struct intel_encoder *encoder, bxt_ddi_clock_get(encoder, pipe_config); else if (IS_CANNONLAKE(dev_priv)) cnl_ddi_clock_get(encoder, pipe_config); + else if (IS_ICELAKE(dev_priv)) + icl_ddi_clock_get(encoder, pipe_config); } void intel_ddi_set_pipe_settings(const struct intel_crtc_state *crtc_state) diff --git a/drivers/gpu/drm/i915/intel_dpll_mgr.c b/drivers/gpu/drm/i915/intel_dpll_mgr.c index 383fbc15113d..07bdbf2582ba 100644 --- a/drivers/gpu/drm/i915/intel_dpll_mgr.c +++ b/drivers/gpu/drm/i915/intel_dpll_mgr.c @@ -2525,6 +2525,76 @@ static bool icl_calc_dpll_state(struct intel_crtc_state *crtc_state, return true; } +int icl_calc_dp_combo_pll_link(struct drm_i915_private *dev_priv, + uint32_t pll_id) +{ + uint32_t cfgcr0, cfgcr1; + uint32_t pdiv, kdiv, qdiv_mode, qdiv_ratio, dco_integer, dco_fraction; + const struct skl_wrpll_params *params; + int index, n_entries, link_clock; + + /* Read back values from DPLL CFGCR registers */ + cfgcr0 = I915_READ(ICL_DPLL_CFGCR0(pll_id)); + cfgcr1 = I915_READ(ICL_DPLL_CFGCR1(pll_id)); + + dco_integer = cfgcr0 & DPLL_CFGCR0_DCO_INTEGER_MASK; + dco_fraction = (cfgcr0 & DPLL_CFGCR0_DCO_FRACTION_MASK) >> + DPLL_CFGCR0_DCO_FRACTION_SHIFT; + pdiv = (cfgcr1 & DPLL_CFGCR1_PDIV_MASK) >> DPLL_CFGCR1_PDIV_SHIFT; + kdiv = (cfgcr1 & DPLL_CFGCR1_KDIV_MASK) >> DPLL_CFGCR1_KDIV_SHIFT; + qdiv_mode = (cfgcr1 & DPLL_CFGCR1_QDIV_MODE(1)) >> + DPLL_CFGCR1_QDIV_MODE_SHIFT; + qdiv_ratio = (cfgcr1 & DPLL_CFGCR1_QDIV_RATIO_MASK) >> + DPLL_CFGCR1_QDIV_RATIO_SHIFT; + + params = dev_priv->cdclk.hw.ref == 24000 ? + icl_dp_combo_pll_24MHz_values : + icl_dp_combo_pll_19_2MHz_values; + n_entries = ARRAY_SIZE(icl_dp_combo_pll_24MHz_values); + + for (index = 0; index < n_entries; index++) { + if (dco_integer == params[index].dco_integer && + dco_fraction == params[index].dco_fraction && + pdiv == params[index].pdiv && + kdiv == params[index].kdiv && + qdiv_mode == params[index].qdiv_mode && + qdiv_ratio == params[index].qdiv_ratio) + break; + } + + /* Map PLL Index to Link Clock */ + switch (index) { + default: + MISSING_CASE(index); + case 0: + link_clock = 540000; + break; + case 1: + link_clock = 270000; + break; + case 2: + link_clock = 162000; + break; + case 3: + link_clock = 324000; + break; + case 4: + link_clock = 216000; + break; + case 5: + link_clock = 432000; + break; + case 6: + link_clock = 648000; + break; + case 7: + link_clock = 810000; + break; + } + + return link_clock; +} + static enum port icl_mg_pll_id_to_port(enum intel_dpll_id id) { return id - DPLL_ID_ICL_MGPLL1 + PORT_C; diff --git a/drivers/gpu/drm/i915/intel_dpll_mgr.h b/drivers/gpu/drm/i915/intel_dpll_mgr.h index 7a0cd564a9ee..78915057d2e6 100644 --- a/drivers/gpu/drm/i915/intel_dpll_mgr.h +++ b/drivers/gpu/drm/i915/intel_dpll_mgr.h @@ -336,5 +336,7 @@ void intel_shared_dpll_init(struct drm_device *dev); void intel_dpll_dump_hw_state(struct drm_i915_private *dev_priv, struct intel_dpll_hw_state *hw_state); +int icl_calc_dp_combo_pll_link(struct drm_i915_private *dev_priv, + uint32_t pll_id); #endif /* _INTEL_DPLL_MGR_H_ */