Re: [PATCH 1/4] drm/i915: kill {bdw, bxt}_modeset_calc_cdclk

Ville Syrjälä
2017-02-17T13:52:15Z

On Fri, Feb 17, 2017 at 11:22:04AM -0200, Paulo Zanoni wrote:
> The functions are pretty much the same, except for the CDCLK and VCO
> calculations. Add BDW support to vlv_modeset_calc_cdclk() and add
> BXT/GLK support to skl_modeset_calc_cdclk(). The two reamining
> functions are still very similar, except for the fact that the vlv
> version doesn't touch the VCO. Further patches could unify them even
> more if that's desired.
>
> While at it, merge some lines that can fit 80 columns in those
> functions.
>
> Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
> ---
> drivers/gpu/drm/i915/intel_cdclk.c | 120 ++++++++++---------------------------
> 1 file changed, 30 insertions(+), 90 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_cdclk.c b/drivers/gpu/drm/i915/intel_cdclk.c
> index d643c0c..d505ff1 100644
> --- a/drivers/gpu/drm/i915/intel_cdclk.c
> +++ b/drivers/gpu/drm/i915/intel_cdclk.c
> @@ -1499,45 +1499,18 @@ static int intel_max_pixel_rate(struct drm_atomic_state *state)
> static int vlv_modeset_calc_cdclk(struct drm_atomic_state *state)
> {
> struct drm_i915_private *dev_priv = to_i915(state->dev);
> - int max_pixclk = intel_max_pixel_rate(state);
> - struct intel_atomic_state *intel_state =
> - to_intel_atomic_state(state);
> - int cdclk;
> -
> - cdclk = vlv_calc_cdclk(dev_priv, max_pixclk);
> -
> - if (cdclk > dev_priv->max_cdclk_freq) {
> - DRM_DEBUG_KMS("requested cdclk (%d kHz) exceeds max (%d kHz)\n",
> - cdclk, dev_priv->max_cdclk_freq);
> - return -EINVAL;
> - }
> -
> - intel_state->cdclk.logical.cdclk = cdclk;
> -
> - if (!intel_state->active_crtcs) {
> - cdclk = vlv_calc_cdclk(dev_priv, 0);
> -
> - intel_state->cdclk.actual.cdclk = cdclk;
> - } else {
> - intel_state->cdclk.actual =
> - intel_state->cdclk.logical;
> - }
> -
> - return 0;
> -}
> -
> -static int bdw_modeset_calc_cdclk(struct drm_atomic_state *state)
> -{
> - struct drm_i915_private *dev_priv = to_i915(state->dev);
> struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
> int max_pixclk = intel_max_pixel_rate(state);
> int cdclk;
>
> /*
> - * FIXME should also account for plane ratio
> - * once 64bpp pixel formats are supported.
> + * FIXME: Broadwell should also account for plane ratio once 64bpp pixel
> + * formats are supported.

BTW these restrictions affect pretty much all platforms, so specifying the
platforms in the comment is rather redundant.

> */
> - cdclk = bdw_calc_cdclk(max_pixclk);
> + if (IS_BROADWELL(dev_priv))
> + cdclk = bdw_calc_cdclk(max_pixclk);
> + else
> + cdclk = vlv_calc_cdclk(dev_priv, max_pixclk);
>
> if (cdclk > dev_priv->max_cdclk_freq) {
> DRM_DEBUG_KMS("requested cdclk (%d kHz) exceeds max (%d kHz)\n",
> @@ -1548,12 +1521,14 @@ static int bdw_modeset_calc_cdclk(struct drm_atomic_state *state)
> intel_state->cdclk.logical.cdclk = cdclk;
>
> if (!intel_state->active_crtcs) {
> - cdclk = bdw_calc_cdclk(0);
> + if (IS_BROADWELL(dev_priv))
> + cdclk = bdw_calc_cdclk(0);
> + else
> + cdclk = vlv_calc_cdclk(dev_priv, 0);
>
> intel_state->cdclk.actual.cdclk = cdclk;
> } else {
> - intel_state->cdclk.actual =
> - intel_state->cdclk.logical;
> + intel_state->cdclk.actual = intel_state->cdclk.logical;
> }
>
> return 0;
> @@ -1561,57 +1536,26 @@ static int bdw_modeset_calc_cdclk(struct drm_atomic_state *state)
>
> static int skl_modeset_calc_cdclk(struct drm_atomic_state *state)
> {
> - struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
> struct drm_i915_private *dev_priv = to_i915(state->dev);
> - const int max_pixclk = intel_max_pixel_rate(state);
> + struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
> + int max_pixclk = intel_max_pixel_rate(state);
> int cdclk, vco;
>
> - vco = intel_state->cdclk.logical.vco;
> - if (!vco)
> - vco = dev_priv->skl_preferred_vco_freq;
> -
> /*
> - * FIXME should also account for plane ratio
> - * once 64bpp pixel formats are supported.
> + * FIXME: Skylake/Kabylake should also account for plane ratio once
> + * 64bpp pixel formats are supported.
> */
> - cdclk = skl_calc_cdclk(max_pixclk, vco);
> -
> - if (cdclk > dev_priv->max_cdclk_freq) {
> - DRM_DEBUG_KMS("requested cdclk (%d kHz) exceeds max (%d kHz)\n",
> - cdclk, dev_priv->max_cdclk_freq);
> - return -EINVAL;
> - }
> -
> - intel_state->cdclk.logical.vco = vco;
> - intel_state->cdclk.logical.cdclk = cdclk;
> -
> - if (!intel_state->active_crtcs) {
> - cdclk = skl_calc_cdclk(0, vco);
> -
> - intel_state->cdclk.actual.vco = vco;
> - intel_state->cdclk.actual.cdclk = cdclk;
> - } else {
> - intel_state->cdclk.actual =
> - intel_state->cdclk.logical;
> - }
> -
> - return 0;
> -}
> -
> -static int bxt_modeset_calc_cdclk(struct drm_atomic_state *state)
> -{
> - struct drm_i915_private *dev_priv = to_i915(state->dev);
> - int max_pixclk = intel_max_pixel_rate(state);
> - struct intel_atomic_state *intel_state =
> - to_intel_atomic_state(state);
> - int cdclk, vco;
> -
> if (IS_GEMINILAKE(dev_priv)) {
> cdclk = glk_calc_cdclk(max_pixclk);
> vco = glk_de_pll_vco(dev_priv, cdclk);
> - } else {
> + } else if (IS_BROXTON(dev_priv)) {
> cdclk = bxt_calc_cdclk(max_pixclk);
> vco = bxt_de_pll_vco(dev_priv, cdclk);
> + } else {
> + vco = intel_state->cdclk.logical.vco;
> + if (!vco)
> + vco = dev_priv->skl_preferred_vco_freq;
> + cdclk = skl_calc_cdclk(max_pixclk, vco);
> }
>
> if (cdclk > dev_priv->max_cdclk_freq) {
> @@ -1627,16 +1571,17 @@ static int bxt_modeset_calc_cdclk(struct drm_atomic_state *state)
> if (IS_GEMINILAKE(dev_priv)) {
> cdclk = glk_calc_cdclk(0);
> vco = glk_de_pll_vco(dev_priv, cdclk);
> - } else {
> + } else if (IS_BROXTON(dev_priv)) {
> cdclk = bxt_calc_cdclk(0);
> vco = bxt_de_pll_vco(dev_priv, cdclk);
> + } else {
> + cdclk = skl_calc_cdclk(0, vco);
> }
>
> intel_state->cdclk.actual.vco = vco;
> intel_state->cdclk.actual.cdclk = cdclk;
> } else {
> - intel_state->cdclk.actual =
> - intel_state->cdclk.logical;
> + intel_state->cdclk.actual = intel_state->cdclk.logical;
> }
>
> return 0;
> @@ -1823,24 +1768,19 @@ void intel_init_cdclk_hooks(struct drm_i915_private *dev_priv)
> {
> if (IS_CHERRYVIEW(dev_priv)) {
> dev_priv->display.set_cdclk = chv_set_cdclk;
> - dev_priv->display.modeset_calc_cdclk =
> - vlv_modeset_calc_cdclk;
> + dev_priv->display.modeset_calc_cdclk = vlv_modeset_calc_cdclk;
> } else if (IS_VALLEYVIEW(dev_priv)) {
> dev_priv->display.set_cdclk = vlv_set_cdclk;
> - dev_priv->display.modeset_calc_cdclk =
> - vlv_modeset_calc_cdclk;
> + dev_priv->display.modeset_calc_cdclk = vlv_modeset_calc_cdclk;
> } else if (IS_BROADWELL(dev_priv)) {
> dev_priv->display.set_cdclk = bdw_set_cdclk;
> - dev_priv->display.modeset_calc_cdclk =
> - bdw_modeset_calc_cdclk;
> + dev_priv->display.modeset_calc_cdclk = vlv_modeset_calc_cdclk;
> } else if (IS_GEN9_LP(dev_priv)) {
> dev_priv->display.set_cdclk = bxt_set_cdclk;
> - dev_priv->display.modeset_calc_cdclk =
> - bxt_modeset_calc_cdclk;
> + dev_priv->display.modeset_calc_cdclk = skl_modeset_calc_cdclk;
> } else if (IS_GEN9_BC(dev_priv)) {
> dev_priv->display.set_cdclk = skl_set_cdclk;
> - dev_priv->display.modeset_calc_cdclk =
> - skl_modeset_calc_cdclk;
> + dev_priv->display.modeset_calc_cdclk = skl_modeset_calc_cdclk;
> }
>
> if (IS_GEN9_BC(dev_priv))
> --
> 2.7.4
>
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--
Ville Syrjälä
Intel OTC