On Tue, 15 Mar 2016, ville.syrj...@linux.intel.com wrote:
> From: Ville Syrjälä <ville.syrj...@linux.intel.com>
>
> The VLV and CHV DPLL disable and update are almost identical in
> how the DPLL/DPLL_MD registers need to be set up. But the code
> looks more different than it really is. Try to bring them into
> line.
>
> v2: s/chv_update_pll/chv_compute_dpll/
>
> Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
> ---
> drivers/gpu/drm/i915/intel_display.c | 63
> ++++++++++++++----------------------
> 1 file changed, 25 insertions(+), 38 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c
> b/drivers/gpu/drm/i915/intel_display.c
> index 22930f05457c..414ed5007e60 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -1759,16 +1759,13 @@ static void vlv_disable_pll(struct drm_i915_private
> *dev_priv, enum pipe pipe)
> /* Make sure the pipe isn't still relying on us */
> assert_pipe_disabled(dev_priv, pipe);
>
> - /*
> - * Leave integrated clock source and reference clock enabled for pipe B.
> - * The latter is needed for VGA hotplug / manual detection.
> - */
So, you change this to keep the reference clock enabled for both
pipes. Deserves a mention in the commit message. AFAICT it's the only
functional change in the patch.
Other than that,
Reviewed-by: Jani Nikula <jani.nik...@intel.com>
> - val = DPLL_VGA_MODE_DIS;
> - if (pipe == PIPE_B)
> - val = DPLL_INTEGRATED_CRI_CLK_VLV | DPLL_REF_CLK_ENABLE_VLV;
> + val = DPLL_INTEGRATED_REF_CLK_VLV |
> + DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS;
> + if (pipe != PIPE_A)
> + val |= DPLL_INTEGRATED_CRI_CLK_VLV;
> +
> I915_WRITE(DPLL(pipe), val);
> POSTING_READ(DPLL(pipe));
> -
> }
>
> static void chv_disable_pll(struct drm_i915_private *dev_priv, enum pipe
> pipe)
> @@ -1779,11 +1776,11 @@ static void chv_disable_pll(struct drm_i915_private
> *dev_priv, enum pipe pipe)
> /* Make sure the pipe isn't still relying on us */
> assert_pipe_disabled(dev_priv, pipe);
>
> - /* Set PLL en = 0 */
> val = DPLL_SSC_REF_CLK_CHV |
> DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS;
> if (pipe != PIPE_A)
> val |= DPLL_INTEGRATED_CRI_CLK_VLV;
> +
> I915_WRITE(DPLL(pipe), val);
> POSTING_READ(DPLL(pipe));
>
> @@ -7240,24 +7237,27 @@ void intel_dp_set_m_n(struct intel_crtc *crtc, enum
> link_m_n_set m_n)
> static void vlv_compute_dpll(struct intel_crtc *crtc,
> struct intel_crtc_state *pipe_config)
> {
> - u32 dpll, dpll_md;
> + pipe_config->dpll_hw_state.dpll = DPLL_INTEGRATED_REF_CLK_VLV |
> + DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS |
> + DPLL_VCO_ENABLE | DPLL_EXT_BUFFER_ENABLE_VLV;
> + if (crtc->pipe != PIPE_A)
> + pipe_config->dpll_hw_state.dpll |= DPLL_INTEGRATED_CRI_CLK_VLV;
>
> - /*
> - * Enable DPIO clock input. We should never disable the reference
> - * clock for pipe B, since VGA hotplug / manual detection depends
> - * on it.
> - */
> - dpll = DPLL_EXT_BUFFER_ENABLE_VLV | DPLL_REF_CLK_ENABLE_VLV |
> - DPLL_VGA_MODE_DIS | DPLL_INTEGRATED_REF_CLK_VLV;
> - /* We should never disable this, set it here for state tracking */
> - if (crtc->pipe == PIPE_B)
> - dpll |= DPLL_INTEGRATED_CRI_CLK_VLV;
> - dpll |= DPLL_VCO_ENABLE;
> - pipe_config->dpll_hw_state.dpll = dpll;
> + pipe_config->dpll_hw_state.dpll_md =
> + (pipe_config->pixel_multiplier - 1) <<
> DPLL_MD_UDI_MULTIPLIER_SHIFT;
> +}
> +
> +static void chv_compute_dpll(struct intel_crtc *crtc,
> + struct intel_crtc_state *pipe_config)
> +{
> + pipe_config->dpll_hw_state.dpll = DPLL_SSC_REF_CLK_CHV |
> + DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS |
> + DPLL_VCO_ENABLE;
> + if (crtc->pipe != PIPE_A)
> + pipe_config->dpll_hw_state.dpll |= DPLL_INTEGRATED_CRI_CLK_VLV;
>
> - dpll_md = (pipe_config->pixel_multiplier - 1)
> - << DPLL_MD_UDI_MULTIPLIER_SHIFT;
> - pipe_config->dpll_hw_state.dpll_md = dpll_md;
> + pipe_config->dpll_hw_state.dpll_md =
> + (pipe_config->pixel_multiplier - 1) <<
> DPLL_MD_UDI_MULTIPLIER_SHIFT;
> }
>
> static void vlv_prepare_pll(struct intel_crtc *crtc,
> @@ -7351,19 +7351,6 @@ static void vlv_prepare_pll(struct intel_crtc *crtc,
> mutex_unlock(&dev_priv->sb_lock);
> }
>
> -static void chv_compute_dpll(struct intel_crtc *crtc,
> - struct intel_crtc_state *pipe_config)
> -{
> - pipe_config->dpll_hw_state.dpll = DPLL_SSC_REF_CLK_CHV |
> - DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS |
> - DPLL_VCO_ENABLE;
> - if (crtc->pipe != PIPE_A)
> - pipe_config->dpll_hw_state.dpll |= DPLL_INTEGRATED_CRI_CLK_VLV;
> -
> - pipe_config->dpll_hw_state.dpll_md =
> - (pipe_config->pixel_multiplier - 1) <<
> DPLL_MD_UDI_MULTIPLIER_SHIFT;
> -}
> -
> static void chv_prepare_pll(struct intel_crtc *crtc,
> const struct intel_crtc_state *pipe_config)
> {
--
Jani Nikula, Intel Open Source Technology Center
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