Split out of bxt_ddi_pll_select() the logic that calculates the pll dividers and dpll_hw_state into a new function that doesn't depend on crtc state. This will be used for enabling the port pll when doing upfront link training.
Signed-off-by: Ander Conselvan de Oliveira <[email protected]> --- drivers/gpu/drm/i915/intel_ddi.c | 150 ++++++++++++++++++++++++--------------- 1 file changed, 91 insertions(+), 59 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c index 00bb299..35a2d96 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -1583,6 +1583,8 @@ struct bxt_clk_div { uint32_t m2_frac; bool m2_frac_en; uint32_t n; + + int vco; }; /* pre-calculated values for DP linkrates */ @@ -1597,54 +1599,61 @@ static const struct bxt_clk_div bxt_dp_clk_val[] = { }; static bool -bxt_ddi_pll_select(struct intel_crtc *intel_crtc, - struct intel_crtc_state *crtc_state, - struct intel_encoder *intel_encoder) +bxt_ddi_hdmi_pll_dividers(struct intel_crtc *intel_crtc, + struct intel_crtc_state *crtc_state, int clock, + struct bxt_clk_div *clk_div) { - struct intel_shared_dpll *pll; - struct bxt_clk_div clk_div = {0}; - int vco = 0; - uint32_t prop_coef, int_coef, gain_ctl, targ_cnt; - uint32_t lanestagger; - int clock = crtc_state->port_clock; + intel_clock_t best_clock; - if (intel_encoder->type == INTEL_OUTPUT_HDMI) { - intel_clock_t best_clock; + /* Calculate HDMI div */ + /* + * FIXME: tie the following calculation into + * i9xx_crtc_compute_clock + */ + if (!bxt_find_best_dpll(crtc_state, clock, &best_clock)) { + DRM_DEBUG_DRIVER("no PLL dividers found for clock %d pipe %c\n", + clock, pipe_name(intel_crtc->pipe)); + return false; + } - /* Calculate HDMI div */ - /* - * FIXME: tie the following calculation into - * i9xx_crtc_compute_clock - */ - if (!bxt_find_best_dpll(crtc_state, clock, &best_clock)) { - DRM_DEBUG_DRIVER("no PLL dividers found for clock %d pipe %c\n", - clock, pipe_name(intel_crtc->pipe)); - return false; - } + clk_div->p1 = best_clock.p1; + clk_div->p2 = best_clock.p2; + WARN_ON(best_clock.m1 != 2); + clk_div->n = best_clock.n; + clk_div->m2_int = best_clock.m2 >> 22; + clk_div->m2_frac = best_clock.m2 & ((1 << 22) - 1); + clk_div->m2_frac_en = clk_div->m2_frac != 0; - clk_div.p1 = best_clock.p1; - clk_div.p2 = best_clock.p2; - WARN_ON(best_clock.m1 != 2); - clk_div.n = best_clock.n; - clk_div.m2_int = best_clock.m2 >> 22; - clk_div.m2_frac = best_clock.m2 & ((1 << 22) - 1); - clk_div.m2_frac_en = clk_div.m2_frac != 0; + clk_div->vco = best_clock.vco; - vco = best_clock.vco; - } else if (intel_encoder->type == INTEL_OUTPUT_DISPLAYPORT || - intel_encoder->type == INTEL_OUTPUT_EDP) { - int i; + return true; +} - clk_div = bxt_dp_clk_val[0]; - for (i = 0; i < ARRAY_SIZE(bxt_dp_clk_val); ++i) { - if (bxt_dp_clk_val[i].clock == clock) { - clk_div = bxt_dp_clk_val[i]; - break; - } +static void +bxt_ddi_dp_pll_dividers(int clock, struct bxt_clk_div *clk_div) +{ + int i; + + *clk_div = bxt_dp_clk_val[0]; + for (i = 0; i < ARRAY_SIZE(bxt_dp_clk_val); ++i) { + if (bxt_dp_clk_val[i].clock == clock) { + *clk_div = bxt_dp_clk_val[i]; + break; } - vco = clock * 10 / 2 * clk_div.p1 * clk_div.p2; } + clk_div->vco = clock * 10 / 2 * clk_div->p1 * clk_div->p2; +} + +static bool +bxt_ddi_set_dpll_hw_state(int clock, + struct bxt_clk_div *clk_div, + struct intel_dpll_hw_state *dpll_hw_state) +{ + int vco = clk_div->vco; + uint32_t prop_coef, int_coef, gain_ctl, targ_cnt; + uint32_t lanestagger; + if (vco >= 6200000 && vco <= 6700000) { prop_coef = 4; int_coef = 9; @@ -1666,9 +1675,6 @@ bxt_ddi_pll_select(struct intel_crtc *intel_crtc, return false; } - memset(&crtc_state->dpll_hw_state, 0, - sizeof(crtc_state->dpll_hw_state)); - if (clock > 270000) lanestagger = 0x18; else if (clock > 135000) @@ -1680,33 +1686,59 @@ bxt_ddi_pll_select(struct intel_crtc *intel_crtc, else lanestagger = 0x02; - crtc_state->dpll_hw_state.ebb0 = - PORT_PLL_P1(clk_div.p1) | PORT_PLL_P2(clk_div.p2); - crtc_state->dpll_hw_state.pll0 = clk_div.m2_int; - crtc_state->dpll_hw_state.pll1 = PORT_PLL_N(clk_div.n); - crtc_state->dpll_hw_state.pll2 = clk_div.m2_frac; + dpll_hw_state->ebb0 = PORT_PLL_P1(clk_div->p1) | PORT_PLL_P2(clk_div->p2); + dpll_hw_state->pll0 = clk_div->m2_int; + dpll_hw_state->pll1 = PORT_PLL_N(clk_div->n); + dpll_hw_state->pll2 = clk_div->m2_frac; - if (clk_div.m2_frac_en) - crtc_state->dpll_hw_state.pll3 = + if (clk_div->m2_frac_en) + dpll_hw_state->pll3 = PORT_PLL_M2_FRAC_ENABLE; - crtc_state->dpll_hw_state.pll6 = - prop_coef | PORT_PLL_INT_COEFF(int_coef); - crtc_state->dpll_hw_state.pll6 |= - PORT_PLL_GAIN_CTL(gain_ctl); + dpll_hw_state->pll6 = prop_coef | PORT_PLL_INT_COEFF(int_coef); + dpll_hw_state->pll6 |= PORT_PLL_GAIN_CTL(gain_ctl); - crtc_state->dpll_hw_state.pll8 = targ_cnt; + dpll_hw_state->pll8 = targ_cnt; - crtc_state->dpll_hw_state.pll9 = 5 << PORT_PLL_LOCK_THRESHOLD_SHIFT; + dpll_hw_state->pll9 = 5 << PORT_PLL_LOCK_THRESHOLD_SHIFT; - crtc_state->dpll_hw_state.pll10 = + dpll_hw_state->pll10 = PORT_PLL_DCO_AMP(PORT_PLL_DCO_AMP_DEFAULT) | PORT_PLL_DCO_AMP_OVR_EN_H; - crtc_state->dpll_hw_state.ebb4 = PORT_PLL_10BIT_CLK_ENABLE; + dpll_hw_state->ebb4 = PORT_PLL_10BIT_CLK_ENABLE; + + dpll_hw_state->pcsdw12 = LANESTAGGER_STRAP_OVRD | lanestagger; + + return true; +} + +static bool +bxt_ddi_pll_select(struct intel_crtc *intel_crtc, + struct intel_crtc_state *crtc_state, + struct intel_encoder *intel_encoder) +{ + struct bxt_clk_div clk_div = {0}; + struct intel_dpll_hw_state dpll_hw_state = {0}; + struct intel_shared_dpll *pll; + int clock = crtc_state->port_clock; + + if (intel_encoder->type == INTEL_OUTPUT_HDMI + && !bxt_ddi_hdmi_pll_dividers(intel_crtc, crtc_state, + clock, &clk_div)) + return false; + + if (intel_encoder->type == INTEL_OUTPUT_DISPLAYPORT || + intel_encoder->type == INTEL_OUTPUT_EDP) + bxt_ddi_dp_pll_dividers(clock, &clk_div); + + if (!bxt_ddi_set_dpll_hw_state(clock, &clk_div, &dpll_hw_state)) + return false; + + memset(&crtc_state->dpll_hw_state, 0, + sizeof(crtc_state->dpll_hw_state)); - crtc_state->dpll_hw_state.pcsdw12 = - LANESTAGGER_STRAP_OVRD | lanestagger; + crtc_state->dpll_hw_state = dpll_hw_state; pll = intel_get_shared_dpll(intel_crtc, crtc_state); if (pll == NULL) { -- 2.4.3 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
