From e62925567c7926e78bc8ca976cde5c28ea265a49 Mon Sep 17 00:00:00 2001 From: Vandana Kannan Date: Wed, 1 Jul 2015 17:02:57 +0530 Subject: [PATCH] drm/i915/bxt: BUNs related to port PLL This patch contains changes based on 2 updates to the spec: Port PLL VCO restriction raised up to 6700. Port PLL now needs DCO amp override enable for all VCO frequencies. v2: Sonika's review comment addressed - dcoampovr_en_h variable not required Based on a discussion with Siva, the following changes have been made. - replace dco_amp var with #define BXT_DCO_AMPLITUDE - set pll10 in a single assignment v3: Move DCO amplitude default value to i915_reg.h. Suggested by Siva. Signed-off-by: Vandana Kannan Reviewed-by: Sonika Jindal [v2] [danvet: Spell out BUN since not everyone knows what this means.] Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_reg.h | 1 + drivers/gpu/drm/i915/intel_ddi.c | 15 +++++---------- drivers/gpu/drm/i915/intel_display.c | 2 +- 3 files changed, 7 insertions(+), 11 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 42ba1ef641d8..ac8436fc6ced 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -1215,6 +1215,7 @@ enum skl_disp_power_wells { #define PORT_PLL_LOCK_THRESHOLD_MASK (0x7 << PORT_PLL_LOCK_THRESHOLD_SHIFT) /* PORT_PLL_10_A */ #define PORT_PLL_DCO_AMP_OVR_EN_H (1<<27) +#define PORT_PLL_DCO_AMP_DEFAULT 15 #define PORT_PLL_DCO_AMP_MASK 0x3c00 #define PORT_PLL_DCO_AMP(x) (x<<10) #define _PORT_PLL_BASE(port) _PORT3(port, _PORT_PLL_0_A, \ diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c index e7f0379453e8..db22f0173027 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -1644,7 +1644,7 @@ bxt_ddi_pll_select(struct intel_crtc *intel_crtc, struct bxt_clk_div clk_div = {0}; int vco = 0; uint32_t prop_coef, int_coef, gain_ctl, targ_cnt; - uint32_t dcoampovr_en_h, dco_amp, lanestagger; + uint32_t lanestagger; if (intel_encoder->type == INTEL_OUTPUT_HDMI) { intel_clock_t best_clock; @@ -1683,9 +1683,7 @@ bxt_ddi_pll_select(struct intel_crtc *intel_crtc, vco = clock * 10 / 2 * clk_div.p1 * clk_div.p2; } - dco_amp = 15; - dcoampovr_en_h = 0; - if (vco >= 6200000 && vco <= 6480000) { + if (vco >= 6200000 && vco <= 6700000) { prop_coef = 4; int_coef = 9; gain_ctl = 3; @@ -1696,8 +1694,6 @@ bxt_ddi_pll_select(struct intel_crtc *intel_crtc, int_coef = 11; gain_ctl = 3; targ_cnt = 9; - if (vco >= 4800000 && vco < 5400000) - dcoampovr_en_h = 1; } else if (vco == 5400000) { prop_coef = 3; int_coef = 8; @@ -1741,10 +1737,9 @@ bxt_ddi_pll_select(struct intel_crtc *intel_crtc, crtc_state->dpll_hw_state.pll9 = 5 << PORT_PLL_LOCK_THRESHOLD_SHIFT; - if (dcoampovr_en_h) - crtc_state->dpll_hw_state.pll10 = PORT_PLL_DCO_AMP_OVR_EN_H; - - crtc_state->dpll_hw_state.pll10 |= PORT_PLL_DCO_AMP(dco_amp); + crtc_state->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; diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 724b0e3a5d37..5ba35bb8e1a5 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -409,7 +409,7 @@ static const intel_limit_t intel_limits_chv = { static const intel_limit_t intel_limits_bxt = { /* FIXME: find real dot limits */ .dot = { .min = 0, .max = INT_MAX }, - .vco = { .min = 4800000, .max = 6480000 }, + .vco = { .min = 4800000, .max = 6700000 }, .n = { .min = 1, .max = 1 }, .m1 = { .min = 2, .max = 2 }, /* FIXME: find real m2 limits */ -- 2.39.5