On Monday, July 10, 2017 10:33:46 PM PDT ville.syrjala@xxxxxxxxxxxxxxx wrote:
> From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
>
> Make the min_pixclk thing less confusing by changing it to track
> the minimum acceptable cdclk frequency instead. This means moving
> the application of the guardbands to a slightly higher level from
> the low level platform specific calc_cdclk() functions.
>
> The immediate benefit is elimination of the confusing 2x factors
> on GLK/CNL+ in the audio workarounds (which stems from the fact
> that the pipes produce two pixels per clock).
>
> v2: Keep cdclk higher on CNL to workaround missing DDI clock voltage
> handling v3: Squash with the CNL cdclk limits patch (DK)
>
Looks good to me, I only have some bikesheds and nitpicks below. Will leave it
to you to decide if you want to address them.
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx>
> Cc: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
> Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
> Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx>
> Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
> Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_drv.h | 12 ++-
> drivers/gpu/drm/i915/intel_cdclk.c | 202
> ++++++++++++++++++----------------- drivers/gpu/drm/i915/intel_display.c |
> 21 ++--
> drivers/gpu/drm/i915/intel_drv.h | 4 +-
> 4 files changed, 125 insertions(+), 114 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.h
> b/drivers/gpu/drm/i915/i915_drv.h index 81cd21ecfa7d..c80176424d84 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -563,6 +563,15 @@ struct i915_hotplug {
> (__i)++) \
> for_each_if (plane_state)
>
> +#define for_each_new_intel_crtc_in_state(__state, crtc, new_crtc_state,
> __i) \ + for ((__i) = 0; \
> + (__i) < (__state)->base.dev->mode_config.num_crtc && \
> + ((crtc) = to_intel_crtc((__state)->base.crtcs[__i].ptr), \
> + (new_crtc_state) =
> to_intel_crtc_state((__state)->base.crtcs[__i].new_state), 1); \ +
> (__i)++) \
> + for_each_if (crtc)
> +
> +
I am not sure how useful adding this macro is. The loop looks concise with
this macro, but we end up doing unnecessary to_intel_crtc() conversions in the
loop. Looks like all we need is a to_intel_crtc_state().
> struct drm_i915_private;
> struct i915_mm_struct;
> struct i915_mmu_object;
> @@ -2268,7 +2277,8 @@ struct drm_i915_private {
> struct mutex dpll_lock;
>
> unsigned int active_crtcs;
> - unsigned int min_pixclk[I915_MAX_PIPES];
> + /* minimum acceptable cdclk for each pipe */
> + int min_cdclk[I915_MAX_PIPES];
>
> int dpio_phy_iosf_port[I915_NUM_PHYS_VLV];
>
> diff --git a/drivers/gpu/drm/i915/intel_cdclk.c
> b/drivers/gpu/drm/i915/intel_cdclk.c index 1241e5891b29..50f153dbea14
> 100644
> --- a/drivers/gpu/drm/i915/intel_cdclk.c
> +++ b/drivers/gpu/drm/i915/intel_cdclk.c
> @@ -417,24 +417,21 @@ static void hsw_get_cdclk(struct drm_i915_private
> *dev_priv, cdclk_state->cdclk = 540000;
> }
>
> -static int vlv_calc_cdclk(struct drm_i915_private *dev_priv,
> - int max_pixclk)
> +static int vlv_calc_cdclk(struct drm_i915_private *dev_priv, int min_cdclk)
> {
> int freq_320 = (dev_priv->hpll_freq << 1) % 320000 != 0 ?
> 333333 : 320000;
> - int limit = IS_CHERRYVIEW(dev_priv) ? 95 : 90;
>
> /*
> * We seem to get an unstable or solid color picture at 200MHz.
> * Not sure what's wrong. For now use 200MHz only when all pipes
> * are off.
> */
> - if (!IS_CHERRYVIEW(dev_priv) &&
> - max_pixclk > freq_320*limit/100)
> + if (IS_VALLEYVIEW(dev_priv) && min_cdclk > freq_320)
> return 400000;
> - else if (max_pixclk > 266667*limit/100)
> + else if (min_cdclk > 266667)
> return freq_320;
> - else if (max_pixclk > 0)
> + else if (min_cdclk > 0)
> return 266667;
> else
> return 200000;
> @@ -612,13 +609,13 @@ static void chv_set_cdclk(struct drm_i915_private
> *dev_priv, intel_display_power_put(dev_priv, POWER_DOMAIN_PIPE_A);
> }
>
> -static int bdw_calc_cdclk(int max_pixclk)
> +static int bdw_calc_cdclk(int min_cdclk)
> {
> - if (max_pixclk > 540000)
> + if (min_cdclk > 540000)
> return 675000;
> - else if (max_pixclk > 450000)
> + else if (min_cdclk > 450000)
> return 540000;
> - else if (max_pixclk > 337500)
> + else if (min_cdclk > 337500)
> return 450000;
> else
> return 337500;
> @@ -724,23 +721,23 @@ static void bdw_set_cdclk(struct drm_i915_private
> *dev_priv, cdclk, dev_priv->cdclk.hw.cdclk);
> }
>
> -static int skl_calc_cdclk(int max_pixclk, int vco)
> +static int skl_calc_cdclk(int min_cdclk, int vco)
> {
> if (vco == 8640000) {
> - if (max_pixclk > 540000)
> + if (min_cdclk > 540000)
> return 617143;
> - else if (max_pixclk > 432000)
> + else if (min_cdclk > 432000)
> return 540000;
> - else if (max_pixclk > 308571)
> + else if (min_cdclk > 308571)
> return 432000;
> else
> return 308571;
> } else {
> - if (max_pixclk > 540000)
> + if (min_cdclk > 540000)
> return 675000;
> - else if (max_pixclk > 450000)
> + else if (min_cdclk > 450000)
> return 540000;
> - else if (max_pixclk > 337500)
> + else if (min_cdclk > 337500)
> return 450000;
> else
> return 337500;
> @@ -1075,31 +1072,25 @@ void skl_uninit_cdclk(struct drm_i915_private
> *dev_priv) skl_set_cdclk(dev_priv, &cdclk_state);
> }
>
> -static int bxt_calc_cdclk(int max_pixclk)
> +static int bxt_calc_cdclk(int min_cdclk)
> {
> - if (max_pixclk > 576000)
> + if (min_cdclk > 576000)
> return 624000;
> - else if (max_pixclk > 384000)
> + else if (min_cdclk > 384000)
> return 576000;
> - else if (max_pixclk > 288000)
> + else if (min_cdclk > 288000)
> return 384000;
> - else if (max_pixclk > 144000)
> + else if (min_cdclk > 144000)
> return 288000;
> else
> return 144000;
> }
>
> -static int glk_calc_cdclk(int max_pixclk)
> +static int glk_calc_cdclk(int min_cdclk)
> {
> - /*
> - * FIXME: Avoid using a pixel clock that is more than 99% of the cdclk
> - * as a temporary workaround. Use a higher cdclk instead. (Note that
> - * intel_compute_max_dotclk() limits the max pixel clock to 99% of max
> - * cdclk.)
> - */
> - if (max_pixclk > DIV_ROUND_UP(2 * 158400 * 99, 100))
> + if (min_cdclk > 158400)
> return 316800;
> - else if (max_pixclk > DIV_ROUND_UP(2 * 79200 * 99, 100))
> + else if (min_cdclk > 79200)
> return 158400;
> else
> return 79200;
> @@ -1420,11 +1411,11 @@ void bxt_uninit_cdclk(struct drm_i915_private
> *dev_priv) bxt_set_cdclk(dev_priv, &cdclk_state);
> }
>
> -static int cnl_calc_cdclk(int max_pixclk)
> +static int cnl_calc_cdclk(int min_cdclk)
> {
> - if (max_pixclk > 336000)
> + if (min_cdclk > 336000)
> return 528000;
> - else if (max_pixclk > 168000)
> + else if (min_cdclk > 168000)
> return 336000;
> else
> return 168000;
> @@ -1732,98 +1723,106 @@ void intel_set_cdclk(struct drm_i915_private
> *dev_priv, dev_priv->display.set_cdclk(dev_priv, cdclk_state);
> }
>
> -static int bdw_adjust_min_pipe_pixel_rate(struct intel_crtc_state
> *crtc_state, - int pixel_rate)
> +static int intel_min_cdclk(struct drm_i915_private *dev_priv,
The names have started to sound similar.
intel_min_cdclk
intel_crtc_compute_min_cdclk
intel_compute_min_cdclk
I can't think of anything better. How about something like
intel_pixel_rate_to_cdclk() ?
> + int pixel_rate)
> +{
> + if (INTEL_GEN(dev_priv) >= 10)
> + /*
> + * FIXME: Switch to DIV_ROUND_UP(pixel_rate, 2)
> + * once DDI clock voltage requirements are
> + * handled correctly.
> + */
> + return pixel_rate;
> + else if (IS_GEMINILAKE(dev_priv))
> + /*
> + * FIXME: Avoid using a pixel clock that is more than 99% of the cdclk
> + * as a temporary workaround. Use a higher cdclk instead. (Note that
> + * intel_compute_max_dotclk() limits the max pixel clock to 99% of max
> + * cdclk.)
> + */
> + return DIV_ROUND_UP(pixel_rate * 100, 2 * 99);
> + else if (IS_GEN9(dev_priv) ||
> + IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv))
I don't see why IS_HASWELL() is needed here. The callers seem to need a
.modeset_calc_cdclk() hook and Haswell does not have one.
> + return pixel_rate;
> + else if (IS_CHERRYVIEW(dev_priv))
> + return DIV_ROUND_UP(pixel_rate * 100, 95);
> + else
> + return DIV_ROUND_UP(pixel_rate * 100, 90);
Type out IS_VALLEYVIEW() explicitly for documentation?
> +}
> +
> +int intel_crtc_compute_min_cdclk(const struct intel_crtc_state *crtc_state)
> {
> struct drm_i915_private *dev_priv =
> to_i915(crtc_state->base.crtc->dev);
> + int min_cdclk;
> +
> + if (!crtc_state->base.enable)
> + return 0;
> +
> + min_cdclk = intel_min_cdclk(dev_priv, crtc_state->pixel_rate);
>
> /* pixel rate mustn't exceed 95% of cdclk with IPS on BDW */
> if (IS_BROADWELL(dev_priv) && crtc_state->ips_enabled)
> - pixel_rate = DIV_ROUND_UP(pixel_rate * 100, 95);
> + min_cdclk = DIV_ROUND_UP(min_cdclk * 100, 95);
>
> /* BSpec says "Do not use DisplayPort with CDCLK less than 432 MHz,
> * audio enabled, port width x4, and link rate HBR2 (5.4 GHz), or else
> * there may be audio corruption or screen corruption." This cdclk
> - * restriction for GLK is 316.8 MHz and since GLK can output two
> - * pixels per clock, the pixel rate becomes 2 * 316.8 MHz.
> + * restriction for GLK is 316.8 MHz.
> */
> if (intel_crtc_has_dp_encoder(crtc_state) &&
> crtc_state->has_audio &&
> crtc_state->port_clock >= 540000 &&
> crtc_state->lane_count == 4) {
> - if (IS_CANNONLAKE(dev_priv))
> - pixel_rate = max(316800, pixel_rate);
> - else if (IS_GEMINILAKE(dev_priv))
> - pixel_rate = max(2 * 316800, pixel_rate);
> - else
> - pixel_rate = max(432000, pixel_rate);
> + if (IS_CANNONLAKE(dev_priv) || IS_GEMINILAKE(dev_priv)) {
> + /* Display WA #1145: glk,cnl */
> + min_cdclk = max(316800, min_cdclk);
> + } else if (IS_GEN9(dev_priv) || IS_BROADWELL(dev_priv)) {
> + /* Display WA #1144: skl,bxt */
> + min_cdclk = max(432000, min_cdclk);
> + }
> }
>
> /* According to BSpec, "The CD clock frequency must be at least twice
> * the frequency of the Azalia BCLK." and BCLK is 96 MHz by default.
> - * The check for GLK has to be adjusted as the platform can output
> - * two pixels per clock.
> */
> - if (crtc_state->has_audio && INTEL_GEN(dev_priv) >= 9) {
> - if (IS_GEMINILAKE(dev_priv))
> - pixel_rate = max(2 * 2 * 96000, pixel_rate);
> - else
> - pixel_rate = max(2 * 96000, pixel_rate);
> - }
> + if (crtc_state->has_audio && INTEL_GEN(dev_priv) >= 9)
> + min_cdclk = max(2 * 96000, min_cdclk);
>
> - return pixel_rate;
> + return min_cdclk;
> }
>
> -/* compute the max rate for new configuration */
> -static int intel_max_pixel_rate(struct drm_atomic_state *state)
> +static int intel_compute_min_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);
> - struct drm_crtc *crtc;
> - struct drm_crtc_state *cstate;
> + struct intel_crtc *crtc;
> struct intel_crtc_state *crtc_state;
> - unsigned int max_pixel_rate = 0, i;
> + int min_cdclk = 0, i;
> enum pipe pipe;
>
> - memcpy(intel_state->min_pixclk, dev_priv->min_pixclk,
> - sizeof(intel_state->min_pixclk));
> -
> - for_each_new_crtc_in_state(state, crtc, cstate, i) {
> - int pixel_rate;
> -
> - crtc_state = to_intel_crtc_state(cstate);
> - if (!crtc_state->base.enable) {
> - intel_state->min_pixclk[i] = 0;
> - continue;
> - }
> + memcpy(intel_state->min_cdclk, dev_priv->min_cdclk,
> + sizeof(intel_state->min_cdclk));
>
> - pixel_rate = crtc_state->pixel_rate;
> -
> - if (IS_BROADWELL(dev_priv) || INTEL_GEN(dev_priv) >= 9)
> - pixel_rate =
> - bdw_adjust_min_pipe_pixel_rate(crtc_state,
> - pixel_rate);
> -
> - intel_state->min_pixclk[i] = pixel_rate;
> - }
> + for_each_new_intel_crtc_in_state(intel_state, crtc, crtc_state, i)
> + intel_state->min_cdclk[i] =
> + intel_crtc_compute_min_cdclk(crtc_state);
>
Like I wrote above, we could just reuse for_each_new_crtc_in_state()
> for_each_pipe(dev_priv, pipe)
> - max_pixel_rate = max(intel_state->min_pixclk[pipe],
> - max_pixel_rate);
> + min_cdclk = max(intel_state->min_cdclk[pipe], min_cdclk);
>
> - return max_pixel_rate;
> + return min_cdclk;
> }
>
> 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);
> + int min_cdclk = intel_compute_min_cdclk(state);
> struct intel_atomic_state *intel_state =
> to_intel_atomic_state(state);
> int cdclk;
>
> - cdclk = vlv_calc_cdclk(dev_priv, max_pixclk);
> + cdclk = vlv_calc_cdclk(dev_priv, min_cdclk);
>
> if (cdclk > dev_priv->max_cdclk_freq) {
> DRM_DEBUG_KMS("requested cdclk (%d kHz) exceeds max (%d kHz)\n",
> @@ -1849,14 +1848,14 @@ 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 min_cdclk = intel_compute_min_cdclk(state);
> int cdclk;
>
> /*
> * FIXME should also account for plane ratio
> * once 64bpp pixel formats are supported.
> */
> - cdclk = bdw_calc_cdclk(max_pixclk);
> + cdclk = bdw_calc_cdclk(min_cdclk);
>
> if (cdclk > dev_priv->max_cdclk_freq) {
> DRM_DEBUG_KMS("requested cdclk (%d kHz) exceeds max (%d kHz)\n",
> @@ -1882,7 +1881,7 @@ 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);
> + int min_cdclk = intel_compute_min_cdclk(state);
> int cdclk, vco;
>
> vco = intel_state->cdclk.logical.vco;
> @@ -1893,7 +1892,7 @@ static int skl_modeset_calc_cdclk(struct
> drm_atomic_state *state) * FIXME should also account for plane ratio
> * once 64bpp pixel formats are supported.
> */
> - cdclk = skl_calc_cdclk(max_pixclk, vco);
> + cdclk = skl_calc_cdclk(min_cdclk, vco);
>
> if (cdclk > dev_priv->max_cdclk_freq) {
> DRM_DEBUG_KMS("requested cdclk (%d kHz) exceeds max (%d kHz)\n",
> @@ -1920,16 +1919,16 @@ static int skl_modeset_calc_cdclk(struct
> drm_atomic_state *state) 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);
> + int min_cdclk = intel_compute_min_cdclk(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);
> + cdclk = glk_calc_cdclk(min_cdclk);
> vco = glk_de_pll_vco(dev_priv, cdclk);
> } else {
> - cdclk = bxt_calc_cdclk(max_pixclk);
> + cdclk = bxt_calc_cdclk(min_cdclk);
> vco = bxt_de_pll_vco(dev_priv, cdclk);
> }
>
> @@ -1966,10 +1965,10 @@ static int cnl_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 min_cdclk = intel_compute_min_cdclk(state);
> int cdclk, vco;
>
> - cdclk = cnl_calc_cdclk(max_pixclk);
> + cdclk = cnl_calc_cdclk(min_cdclk);
> vco = cnl_cdclk_pll_vco(dev_priv, cdclk);
>
> if (cdclk > dev_priv->max_cdclk_freq) {
> @@ -1999,14 +1998,21 @@ static int intel_compute_max_dotclk(struct
> drm_i915_private *dev_priv) {
> int max_cdclk_freq = dev_priv->max_cdclk_freq;
>
> - if (IS_GEMINILAKE(dev_priv))
> + if (INTEL_GEN(dev_priv) >= 10)
> + /*
> + * FIXME: Allow '2 * max_cdclk_freq'
> + * once DDI clock voltage requirements are
> + * handled correctly.
> + */
> + return max_cdclk_freq;
> + else if (IS_GEMINILAKE(dev_priv))
> /*
> * FIXME: Limiting to 99% as a temporary workaround. See
> - * glk_calc_cdclk() for details.
> + * intel_min_cdclk() for details.
> */
> return 2 * max_cdclk_freq * 99 / 100;
> - else if (INTEL_INFO(dev_priv)->gen >= 9 ||
> - IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
> + else if (IS_GEN9(dev_priv) ||
> + IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv))
> return max_cdclk_freq;
> else if (IS_CHERRYVIEW(dev_priv))
> return max_cdclk_freq*95/100;
> diff --git a/drivers/gpu/drm/i915/intel_display.c
> b/drivers/gpu/drm/i915/intel_display.c index 2144adc5b1d5..b47535f5d95d
> 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -5920,7 +5920,7 @@ static void intel_crtc_disable_noatomic(struct
> drm_crtc *crtc, intel_crtc->enabled_power_domains = 0;
>
> dev_priv->active_crtcs &= ~(1 << intel_crtc->pipe);
> - dev_priv->min_pixclk[intel_crtc->pipe] = 0;
> + dev_priv->min_cdclk[intel_crtc->pipe] = 0;
> }
>
> /*
> @@ -13292,8 +13292,8 @@ static int intel_atomic_commit(struct drm_device
> *dev, intel_atomic_track_fbs(state);
>
> if (intel_state->modeset) {
> - memcpy(dev_priv->min_pixclk, intel_state->min_pixclk,
> - sizeof(intel_state->min_pixclk));
> + memcpy(dev_priv->min_cdclk, intel_state->min_cdclk,
> + sizeof(intel_state->min_cdclk));
> dev_priv->active_crtcs = intel_state->active_crtcs;
> dev_priv->cdclk.logical = intel_state->cdclk.logical;
> dev_priv->cdclk.actual = intel_state->cdclk.actual;
> @@ -15569,7 +15569,7 @@ static void intel_modeset_readout_hw_state(struct
> drm_device *dev) for_each_intel_crtc(dev, crtc) {
> struct intel_crtc_state *crtc_state =
> to_intel_crtc_state(crtc->base.state);
> - int pixclk = 0;
> + int min_cdclk = 0;
>
> memset(&crtc->base.mode, 0, sizeof(crtc->base.mode));
> if (crtc_state->base.active) {
> @@ -15590,22 +15590,15 @@ static void intel_modeset_readout_hw_state(struct
> drm_device *dev)
>
> intel_crtc_compute_pixel_rate(crtc_state);
>
> - if (INTEL_GEN(dev_priv) >= 9 || IS_BROADWELL(dev_priv) ||
> - IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
> - pixclk = crtc_state->pixel_rate;
> - else
> - WARN_ON(dev_priv->display.modeset_calc_cdclk);
> -
> - /* pixel rate mustn't exceed 95% of cdclk with IPS on BDW */
> - if (IS_BROADWELL(dev_priv) && crtc_state->ips_enabled)
> - pixclk = DIV_ROUND_UP(pixclk * 100, 95);
> + if (dev_priv->display.modeset_calc_cdclk)
> + min_cdclk = intel_crtc_compute_min_cdclk(crtc_state);
Hmm. So we were not applying the audio workarounds here. Wonder why it did not
cause any trouble.
I believe, the .modeset_calc_cdclk() functions are not called when this
hw_state is committed. Is that right?
>
> drm_calc_timestamping_constants(&crtc->base,
> &crtc_state->base.adjusted_mode);
> update_scanline_offset(crtc);
> }
>
> - dev_priv->min_pixclk[crtc->pipe] = pixclk;
> + dev_priv->min_cdclk[crtc->pipe] = min_cdclk;
>
> intel_pipe_config_sanity_check(dev_priv, crtc_state);
> }
> diff --git a/drivers/gpu/drm/i915/intel_drv.h
> b/drivers/gpu/drm/i915/intel_drv.h index d17a32437f07..8cc1b86b799a 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -383,7 +383,8 @@ struct intel_atomic_state {
> unsigned int active_pipe_changes;
>
> unsigned int active_crtcs;
> - unsigned int min_pixclk[I915_MAX_PIPES];
> + /* minimum acceptable cdclk for each pipe */
> + int min_cdclk[I915_MAX_PIPES];
>
> struct intel_shared_dpll_state shared_dpll[I915_NUM_PLLS];
>
> @@ -1308,6 +1309,7 @@ void intel_audio_init(struct drm_i915_private
> *dev_priv); void intel_audio_deinit(struct drm_i915_private *dev_priv);
>
> /* intel_cdclk.c */
> +int intel_crtc_compute_min_cdclk(const struct intel_crtc_state
> *crtc_state); void skl_init_cdclk(struct drm_i915_private *dev_priv);
> void skl_uninit_cdclk(struct drm_i915_private *dev_priv);
> void cnl_init_cdclk(struct drm_i915_private *dev_priv);
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