On Mon, Feb 16, 2015 at 03:08:02PM +0530, Vijay Purushothaman wrote:
> This patch implements latest PHY changes in Gain, prop and int co-efficients
> based on the vco freq.
>
> Signed-off-by: Vijay Purushothaman <vijay.a.purushothaman@xxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_reg.h | 1 +
> drivers/gpu/drm/i915/intel_display.c | 42 ++++++++++++++++++++++++----------
> 2 files changed, 31 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 5814f67..b5bce4e 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -1027,6 +1027,7 @@ 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 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 ae2a77f..ca02cf7 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -6039,10 +6039,10 @@ 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;
> @@ -6050,7 +6050,9 @@ 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
> @@ -6104,18 +6106,34 @@ static void chv_prepare_pll(struct intel_crtc *crtc,
> }
>
> /* 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 = 0;
In your original patch tribuf_calcntr was 9 here. Which is correct?
> + } 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);
These too were different in your original patch, but I guess it doens't
matter either way that much since we should never get here.
> + 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 |= (tribuf_calcntr << DPIO_CHV_TDC_TARGET_CNT_SHIFT);
Need to clear out the old bits again. Seems to be 10bits by the looks of it.
> + 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)) |
> --
> 1.7.9.5
>
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--
Ville Syrjälä
Intel OTC
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