From 9cbe40c15a753e02f5da16f6de901decf3276cf1 Mon Sep 17 00:00:00 2001 From: Vijay Purushothaman Date: Thu, 5 Mar 2015 19:33:08 +0530 Subject: [PATCH] drm/i915: Update prop, int co-eff and gain threshold for CHV MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit This patch implements latest PHY changes in Gain, prop and int co-efficients based on the vco freq. v2: Split the original changes into multiple smaller patches based on review by Ville v3: Addressed Ville's review comments. Fixed the error introduced in v2. Clear the old bits before we modify those bits as part of RMW. v4: TDC target cnt is 10 bits and not 8 bits (Ville) Signed-off-by: Vijay Purushothaman Reviewed-by: Ville Syrjälä Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_reg.h | 2 ++ drivers/gpu/drm/i915/intel_display.c | 43 ++++++++++++++++++++++++++---------- 2 files changed, 33 insertions(+), 12 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 4c64f17..5f9a91f 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -1041,6 +1041,8 @@ enum skl_disp_power_wells { #define _CHV_PLL_DW8_CH0 0x8020 #define _CHV_PLL_DW8_CH1 0x81A0 +#define DPIO_CHV_TDC_TARGET_CNT_SHIFT 0 +#define DPIO_CHV_TDC_TARGET_CNT_MASK (0x3FF << 0) #define CHV_PLL_DW8(ch) _PIPE(ch, _CHV_PLL_DW8_CH0, _CHV_PLL_DW8_CH1) #define _CHV_PLL_DW9_CH0 0x8024 diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 2eea258..cbf426ec 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -6159,10 +6159,10 @@ static void chv_prepare_pll(struct intel_crtc *crtc, int pipe = crtc->pipe; int dpll_reg = DPLL(crtc->pipe); enum dpio_channel port = vlv_pipe_to_channel(pipe); - u32 loopfilter, intcoeff; + u32 loopfilter, tribuf_calcntr; u32 bestn, bestm1, bestm2, bestp1, bestp2, bestm2_frac; u32 dpio_val; - int refclk; + int vco; bestn = pipe_config->dpll.n; bestm2_frac = pipe_config->dpll.m2 & 0x3fffff; @@ -6170,7 +6170,9 @@ static void chv_prepare_pll(struct intel_crtc *crtc, bestm2 = pipe_config->dpll.m2 >> 22; bestp1 = pipe_config->dpll.p1; bestp2 = pipe_config->dpll.p2; + vco = pipe_config->dpll.vco; dpio_val = 0; + loopfilter = 0; /* * Enable Refclk and SSC @@ -6217,18 +6219,35 @@ static void chv_prepare_pll(struct intel_crtc *crtc, vlv_dpio_write(dev_priv, pipe, CHV_PLL_DW9(port), dpio_val); /* Loop filter */ - refclk = i9xx_get_refclk(crtc, 0); - loopfilter = 5 << DPIO_CHV_PROP_COEFF_SHIFT | - 2 << DPIO_CHV_GAIN_CTRL_SHIFT; - if (refclk == 100000) - intcoeff = 11; - else if (refclk == 38400) - intcoeff = 10; - else - intcoeff = 9; - loopfilter |= intcoeff << DPIO_CHV_INT_COEFF_SHIFT; + if (vco == 5400000) { + loopfilter |= (0x3 << DPIO_CHV_PROP_COEFF_SHIFT); + loopfilter |= (0x8 << DPIO_CHV_INT_COEFF_SHIFT); + loopfilter |= (0x1 << DPIO_CHV_GAIN_CTRL_SHIFT); + tribuf_calcntr = 0x9; + } else if (vco <= 6200000) { + loopfilter |= (0x5 << DPIO_CHV_PROP_COEFF_SHIFT); + loopfilter |= (0xB << DPIO_CHV_INT_COEFF_SHIFT); + loopfilter |= (0x3 << DPIO_CHV_GAIN_CTRL_SHIFT); + tribuf_calcntr = 0x9; + } else if (vco <= 6480000) { + loopfilter |= (0x4 << DPIO_CHV_PROP_COEFF_SHIFT); + loopfilter |= (0x9 << DPIO_CHV_INT_COEFF_SHIFT); + loopfilter |= (0x3 << DPIO_CHV_GAIN_CTRL_SHIFT); + tribuf_calcntr = 0x8; + } else { + /* Not supported. Apply the same limits as in the max case */ + loopfilter |= (0x4 << DPIO_CHV_PROP_COEFF_SHIFT); + loopfilter |= (0x9 << DPIO_CHV_INT_COEFF_SHIFT); + loopfilter |= (0x3 << DPIO_CHV_GAIN_CTRL_SHIFT); + tribuf_calcntr = 0; + } vlv_dpio_write(dev_priv, pipe, CHV_PLL_DW6(port), loopfilter); + dpio_val = vlv_dpio_read(dev_priv, pipe, CHV_PLL_DW8(pipe)); + dpio_val &= ~DPIO_CHV_TDC_TARGET_CNT_MASK; + dpio_val |= (tribuf_calcntr << DPIO_CHV_TDC_TARGET_CNT_SHIFT); + vlv_dpio_write(dev_priv, pipe, CHV_PLL_DW8(port), dpio_val); + /* AFC Recal */ vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW14(port), vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW14(port)) | -- 2.7.4