Re: [RFC 2/2] drm/i915: move pipe config compare to intel_verify.c

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On Tue, Apr 16, 2019 at 01:36:03PM +0300, Jani Nikula wrote:
> Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>

pipe_config_compare is used both for the atomic_check logic, and the
verifier. I think stuffing it into the verifier code is misplacing it as
much as e.g. stuffing it into intel_atomic_check.c file.

What I'd do instead is create an intel_crtc_state.[hc] pair and collect
everything that operates on struct intel_crtc_state, plus the struct
itself. Of course we might want to split out specific subtopics from this,
like e.g. the fairly massive amount of code related to compute clock
state.
-Daniel

> ---
>  drivers/gpu/drm/i915/intel_display.c | 471 +--------------------------
>  drivers/gpu/drm/i915/intel_drv.h     |   9 +-
>  drivers/gpu/drm/i915/intel_verify.c  | 465 ++++++++++++++++++++++++++
>  drivers/gpu/drm/i915/intel_verify.h  |   8 +
>  4 files changed, 478 insertions(+), 475 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 31a931..14899f 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -202,9 +202,9 @@ static void intel_update_czclk(struct drm_i915_private *dev_priv)
>  	DRM_DEBUG_DRIVER("CZ clock rate: %d kHz\n", dev_priv->czclk_freq);
>  }
>  
> -static inline u32 /* units of 100MHz */
> -intel_fdi_link_freq(struct drm_i915_private *dev_priv,
> -		    const struct intel_crtc_state *pipe_config)
> +/* units of 100MHz */
> +u32 intel_fdi_link_freq(struct drm_i915_private *dev_priv,
> +			const struct intel_crtc_state *pipe_config)
>  {
>  	if (HAS_DDI(dev_priv))
>  		return pipe_config->port_clock; /* SPLL */
> @@ -11904,471 +11904,6 @@ intel_modeset_pipe_config(struct drm_crtc *crtc,
>  	return 0;
>  }
>  
> -static bool intel_fuzzy_clock_check(int clock1, int clock2)
> -{
> -	int diff;
> -
> -	if (clock1 == clock2)
> -		return true;
> -
> -	if (!clock1 || !clock2)
> -		return false;
> -
> -	diff = abs(clock1 - clock2);
> -
> -	if (((((diff + clock1 + clock2) * 100)) / (clock1 + clock2)) < 105)
> -		return true;
> -
> -	return false;
> -}
> -
> -static bool
> -intel_compare_m_n(unsigned int m, unsigned int n,
> -		  unsigned int m2, unsigned int n2,
> -		  bool exact)
> -{
> -	if (m == m2 && n == n2)
> -		return true;
> -
> -	if (exact || !m || !n || !m2 || !n2)
> -		return false;
> -
> -	BUILD_BUG_ON(DATA_LINK_M_N_MASK > INT_MAX);
> -
> -	if (n > n2) {
> -		while (n > n2) {
> -			m2 <<= 1;
> -			n2 <<= 1;
> -		}
> -	} else if (n < n2) {
> -		while (n < n2) {
> -			m <<= 1;
> -			n <<= 1;
> -		}
> -	}
> -
> -	if (n != n2)
> -		return false;
> -
> -	return intel_fuzzy_clock_check(m, m2);
> -}
> -
> -static bool
> -intel_compare_link_m_n(const struct intel_link_m_n *m_n,
> -		       struct intel_link_m_n *m2_n2,
> -		       bool adjust)
> -{
> -	if (m_n->tu == m2_n2->tu &&
> -	    intel_compare_m_n(m_n->gmch_m, m_n->gmch_n,
> -			      m2_n2->gmch_m, m2_n2->gmch_n, !adjust) &&
> -	    intel_compare_m_n(m_n->link_m, m_n->link_n,
> -			      m2_n2->link_m, m2_n2->link_n, !adjust)) {
> -		if (adjust)
> -			*m2_n2 = *m_n;
> -
> -		return true;
> -	}
> -
> -	return false;
> -}
> -
> -static bool
> -intel_compare_infoframe(const union hdmi_infoframe *a,
> -			const union hdmi_infoframe *b)
> -{
> -	return memcmp(a, b, sizeof(*a)) == 0;
> -}
> -
> -static void
> -pipe_config_infoframe_err(struct drm_i915_private *dev_priv,
> -			  bool adjust, const char *name,
> -			  const union hdmi_infoframe *a,
> -			  const union hdmi_infoframe *b)
> -{
> -	if (adjust) {
> -		if ((drm_debug & DRM_UT_KMS) == 0)
> -			return;
> -
> -		drm_dbg(DRM_UT_KMS, "mismatch in %s infoframe", name);
> -		drm_dbg(DRM_UT_KMS, "expected:");
> -		hdmi_infoframe_log(KERN_DEBUG, dev_priv->drm.dev, a);
> -		drm_dbg(DRM_UT_KMS, "found");
> -		hdmi_infoframe_log(KERN_DEBUG, dev_priv->drm.dev, b);
> -	} else {
> -		drm_err("mismatch in %s infoframe", name);
> -		drm_err("expected:");
> -		hdmi_infoframe_log(KERN_ERR, dev_priv->drm.dev, a);
> -		drm_err("found");
> -		hdmi_infoframe_log(KERN_ERR, dev_priv->drm.dev, b);
> -	}
> -}
> -
> -static void __printf(3, 4)
> -pipe_config_err(bool adjust, const char *name, const char *format, ...)
> -{
> -	struct va_format vaf;
> -	va_list args;
> -
> -	va_start(args, format);
> -	vaf.fmt = format;
> -	vaf.va = &args;
> -
> -	if (adjust)
> -		drm_dbg(DRM_UT_KMS, "mismatch in %s %pV", name, &vaf);
> -	else
> -		drm_err("mismatch in %s %pV", name, &vaf);
> -
> -	va_end(args);
> -}
> -
> -static bool fastboot_enabled(struct drm_i915_private *dev_priv)
> -{
> -	if (i915_modparams.fastboot != -1)
> -		return i915_modparams.fastboot;
> -
> -	/* Enable fastboot by default on Skylake and newer */
> -	if (INTEL_GEN(dev_priv) >= 9)
> -		return true;
> -
> -	/* Enable fastboot by default on VLV and CHV */
> -	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
> -		return true;
> -
> -	/* Disabled by default on all others */
> -	return false;
> -}
> -
> -bool
> -intel_pipe_config_compare(struct drm_i915_private *dev_priv,
> -			  struct intel_crtc_state *current_config,
> -			  struct intel_crtc_state *pipe_config,
> -			  bool adjust)
> -{
> -	bool ret = true;
> -	bool fixup_inherited = adjust &&
> -		(current_config->base.mode.private_flags & I915_MODE_FLAG_INHERITED) &&
> -		!(pipe_config->base.mode.private_flags & I915_MODE_FLAG_INHERITED);
> -
> -	if (fixup_inherited && !fastboot_enabled(dev_priv)) {
> -		DRM_DEBUG_KMS("initial modeset and fastboot not set\n");
> -		ret = false;
> -	}
> -
> -#define PIPE_CONF_CHECK_X(name) do { \
> -	if (current_config->name != pipe_config->name) { \
> -		pipe_config_err(adjust, __stringify(name), \
> -			  "(expected 0x%08x, found 0x%08x)\n", \
> -			  current_config->name, \
> -			  pipe_config->name); \
> -		ret = false; \
> -	} \
> -} while (0)
> -
> -#define PIPE_CONF_CHECK_I(name) do { \
> -	if (current_config->name != pipe_config->name) { \
> -		pipe_config_err(adjust, __stringify(name), \
> -			  "(expected %i, found %i)\n", \
> -			  current_config->name, \
> -			  pipe_config->name); \
> -		ret = false; \
> -	} \
> -} while (0)
> -
> -#define PIPE_CONF_CHECK_BOOL(name) do { \
> -	if (current_config->name != pipe_config->name) { \
> -		pipe_config_err(adjust, __stringify(name), \
> -			  "(expected %s, found %s)\n", \
> -			  yesno(current_config->name), \
> -			  yesno(pipe_config->name)); \
> -		ret = false; \
> -	} \
> -} while (0)
> -
> -/*
> - * Checks state where we only read out the enabling, but not the entire
> - * state itself (like full infoframes or ELD for audio). These states
> - * require a full modeset on bootup to fix up.
> - */
> -#define PIPE_CONF_CHECK_BOOL_INCOMPLETE(name) do { \
> -	if (!fixup_inherited || (!current_config->name && !pipe_config->name)) { \
> -		PIPE_CONF_CHECK_BOOL(name); \
> -	} else { \
> -		pipe_config_err(adjust, __stringify(name), \
> -			  "unable to verify whether state matches exactly, forcing modeset (expected %s, found %s)\n", \
> -			  yesno(current_config->name), \
> -			  yesno(pipe_config->name)); \
> -		ret = false; \
> -	} \
> -} while (0)
> -
> -#define PIPE_CONF_CHECK_P(name) do { \
> -	if (current_config->name != pipe_config->name) { \
> -		pipe_config_err(adjust, __stringify(name), \
> -			  "(expected %p, found %p)\n", \
> -			  current_config->name, \
> -			  pipe_config->name); \
> -		ret = false; \
> -	} \
> -} while (0)
> -
> -#define PIPE_CONF_CHECK_M_N(name) do { \
> -	if (!intel_compare_link_m_n(&current_config->name, \
> -				    &pipe_config->name,\
> -				    adjust)) { \
> -		pipe_config_err(adjust, __stringify(name), \
> -			  "(expected tu %i gmch %i/%i link %i/%i, " \
> -			  "found tu %i, gmch %i/%i link %i/%i)\n", \
> -			  current_config->name.tu, \
> -			  current_config->name.gmch_m, \
> -			  current_config->name.gmch_n, \
> -			  current_config->name.link_m, \
> -			  current_config->name.link_n, \
> -			  pipe_config->name.tu, \
> -			  pipe_config->name.gmch_m, \
> -			  pipe_config->name.gmch_n, \
> -			  pipe_config->name.link_m, \
> -			  pipe_config->name.link_n); \
> -		ret = false; \
> -	} \
> -} while (0)
> -
> -/* This is required for BDW+ where there is only one set of registers for
> - * switching between high and low RR.
> - * This macro can be used whenever a comparison has to be made between one
> - * hw state and multiple sw state variables.
> - */
> -#define PIPE_CONF_CHECK_M_N_ALT(name, alt_name) do { \
> -	if (!intel_compare_link_m_n(&current_config->name, \
> -				    &pipe_config->name, adjust) && \
> -	    !intel_compare_link_m_n(&current_config->alt_name, \
> -				    &pipe_config->name, adjust)) { \
> -		pipe_config_err(adjust, __stringify(name), \
> -			  "(expected tu %i gmch %i/%i link %i/%i, " \
> -			  "or tu %i gmch %i/%i link %i/%i, " \
> -			  "found tu %i, gmch %i/%i link %i/%i)\n", \
> -			  current_config->name.tu, \
> -			  current_config->name.gmch_m, \
> -			  current_config->name.gmch_n, \
> -			  current_config->name.link_m, \
> -			  current_config->name.link_n, \
> -			  current_config->alt_name.tu, \
> -			  current_config->alt_name.gmch_m, \
> -			  current_config->alt_name.gmch_n, \
> -			  current_config->alt_name.link_m, \
> -			  current_config->alt_name.link_n, \
> -			  pipe_config->name.tu, \
> -			  pipe_config->name.gmch_m, \
> -			  pipe_config->name.gmch_n, \
> -			  pipe_config->name.link_m, \
> -			  pipe_config->name.link_n); \
> -		ret = false; \
> -	} \
> -} while (0)
> -
> -#define PIPE_CONF_CHECK_FLAGS(name, mask) do { \
> -	if ((current_config->name ^ pipe_config->name) & (mask)) { \
> -		pipe_config_err(adjust, __stringify(name), \
> -			  "(%x) (expected %i, found %i)\n", \
> -			  (mask), \
> -			  current_config->name & (mask), \
> -			  pipe_config->name & (mask)); \
> -		ret = false; \
> -	} \
> -} while (0)
> -
> -#define PIPE_CONF_CHECK_CLOCK_FUZZY(name) do { \
> -	if (!intel_fuzzy_clock_check(current_config->name, pipe_config->name)) { \
> -		pipe_config_err(adjust, __stringify(name), \
> -			  "(expected %i, found %i)\n", \
> -			  current_config->name, \
> -			  pipe_config->name); \
> -		ret = false; \
> -	} \
> -} while (0)
> -
> -#define PIPE_CONF_CHECK_INFOFRAME(name) do { \
> -	if (!intel_compare_infoframe(&current_config->infoframes.name, \
> -				     &pipe_config->infoframes.name)) { \
> -		pipe_config_infoframe_err(dev_priv, adjust, __stringify(name), \
> -					  &current_config->infoframes.name, \
> -					  &pipe_config->infoframes.name); \
> -		ret = false; \
> -	} \
> -} while (0)
> -
> -#define PIPE_CONF_QUIRK(quirk) \
> -	((current_config->quirks | pipe_config->quirks) & (quirk))
> -
> -	PIPE_CONF_CHECK_I(cpu_transcoder);
> -
> -	PIPE_CONF_CHECK_BOOL(has_pch_encoder);
> -	PIPE_CONF_CHECK_I(fdi_lanes);
> -	PIPE_CONF_CHECK_M_N(fdi_m_n);
> -
> -	PIPE_CONF_CHECK_I(lane_count);
> -	PIPE_CONF_CHECK_X(lane_lat_optim_mask);
> -
> -	if (INTEL_GEN(dev_priv) < 8) {
> -		PIPE_CONF_CHECK_M_N(dp_m_n);
> -
> -		if (current_config->has_drrs)
> -			PIPE_CONF_CHECK_M_N(dp_m2_n2);
> -	} else
> -		PIPE_CONF_CHECK_M_N_ALT(dp_m_n, dp_m2_n2);
> -
> -	PIPE_CONF_CHECK_X(output_types);
> -
> -	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_hdisplay);
> -	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_htotal);
> -	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_hblank_start);
> -	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_hblank_end);
> -	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_hsync_start);
> -	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_hsync_end);
> -
> -	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_vdisplay);
> -	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_vtotal);
> -	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_vblank_start);
> -	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_vblank_end);
> -	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_vsync_start);
> -	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_vsync_end);
> -
> -	PIPE_CONF_CHECK_I(pixel_multiplier);
> -	PIPE_CONF_CHECK_I(output_format);
> -	PIPE_CONF_CHECK_BOOL(has_hdmi_sink);
> -	if ((INTEL_GEN(dev_priv) < 8 && !IS_HASWELL(dev_priv)) ||
> -	    IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
> -		PIPE_CONF_CHECK_BOOL(limited_color_range);
> -
> -	PIPE_CONF_CHECK_BOOL(hdmi_scrambling);
> -	PIPE_CONF_CHECK_BOOL(hdmi_high_tmds_clock_ratio);
> -	PIPE_CONF_CHECK_BOOL_INCOMPLETE(has_infoframe);
> -
> -	PIPE_CONF_CHECK_BOOL_INCOMPLETE(has_audio);
> -
> -	PIPE_CONF_CHECK_FLAGS(base.adjusted_mode.flags,
> -			      DRM_MODE_FLAG_INTERLACE);
> -
> -	if (!PIPE_CONF_QUIRK(PIPE_CONFIG_QUIRK_MODE_SYNC_FLAGS)) {
> -		PIPE_CONF_CHECK_FLAGS(base.adjusted_mode.flags,
> -				      DRM_MODE_FLAG_PHSYNC);
> -		PIPE_CONF_CHECK_FLAGS(base.adjusted_mode.flags,
> -				      DRM_MODE_FLAG_NHSYNC);
> -		PIPE_CONF_CHECK_FLAGS(base.adjusted_mode.flags,
> -				      DRM_MODE_FLAG_PVSYNC);
> -		PIPE_CONF_CHECK_FLAGS(base.adjusted_mode.flags,
> -				      DRM_MODE_FLAG_NVSYNC);
> -	}
> -
> -	PIPE_CONF_CHECK_X(gmch_pfit.control);
> -	/* pfit ratios are autocomputed by the hw on gen4+ */
> -	if (INTEL_GEN(dev_priv) < 4)
> -		PIPE_CONF_CHECK_X(gmch_pfit.pgm_ratios);
> -	PIPE_CONF_CHECK_X(gmch_pfit.lvds_border_bits);
> -
> -	if (!adjust) {
> -		PIPE_CONF_CHECK_I(pipe_src_w);
> -		PIPE_CONF_CHECK_I(pipe_src_h);
> -
> -		PIPE_CONF_CHECK_BOOL(pch_pfit.enabled);
> -		if (current_config->pch_pfit.enabled) {
> -			PIPE_CONF_CHECK_X(pch_pfit.pos);
> -			PIPE_CONF_CHECK_X(pch_pfit.size);
> -		}
> -
> -		PIPE_CONF_CHECK_I(scaler_state.scaler_id);
> -		PIPE_CONF_CHECK_CLOCK_FUZZY(pixel_rate);
> -
> -		PIPE_CONF_CHECK_X(gamma_mode);
> -		if (IS_CHERRYVIEW(dev_priv))
> -			PIPE_CONF_CHECK_X(cgm_mode);
> -		else
> -			PIPE_CONF_CHECK_X(csc_mode);
> -		PIPE_CONF_CHECK_BOOL(gamma_enable);
> -		PIPE_CONF_CHECK_BOOL(csc_enable);
> -	}
> -
> -	PIPE_CONF_CHECK_BOOL(double_wide);
> -
> -	PIPE_CONF_CHECK_P(shared_dpll);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.dpll);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.dpll_md);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.fp0);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.fp1);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.wrpll);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.spll);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.ctrl1);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.cfgcr1);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.cfgcr2);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.cfgcr0);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.ebb0);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.ebb4);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.pll0);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.pll1);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.pll2);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.pll3);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.pll6);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.pll8);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.pll9);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.pll10);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.pcsdw12);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.mg_refclkin_ctl);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.mg_clktop2_coreclkctl1);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.mg_clktop2_hsclkctl);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_div0);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_div1);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_lf);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_frac_lock);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_ssc);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_bias);
> -	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_tdc_coldst_bias);
> -
> -	PIPE_CONF_CHECK_X(dsi_pll.ctrl);
> -	PIPE_CONF_CHECK_X(dsi_pll.div);
> -
> -	if (IS_G4X(dev_priv) || INTEL_GEN(dev_priv) >= 5)
> -		PIPE_CONF_CHECK_I(pipe_bpp);
> -
> -	PIPE_CONF_CHECK_CLOCK_FUZZY(base.adjusted_mode.crtc_clock);
> -	PIPE_CONF_CHECK_CLOCK_FUZZY(port_clock);
> -
> -	PIPE_CONF_CHECK_I(min_voltage_level);
> -
> -	PIPE_CONF_CHECK_X(infoframes.enable);
> -	PIPE_CONF_CHECK_X(infoframes.gcp);
> -	PIPE_CONF_CHECK_INFOFRAME(avi);
> -	PIPE_CONF_CHECK_INFOFRAME(spd);
> -	PIPE_CONF_CHECK_INFOFRAME(hdmi);
> -
> -#undef PIPE_CONF_CHECK_X
> -#undef PIPE_CONF_CHECK_I
> -#undef PIPE_CONF_CHECK_BOOL
> -#undef PIPE_CONF_CHECK_BOOL_INCOMPLETE
> -#undef PIPE_CONF_CHECK_P
> -#undef PIPE_CONF_CHECK_FLAGS
> -#undef PIPE_CONF_CHECK_CLOCK_FUZZY
> -#undef PIPE_CONF_QUIRK
> -
> -	return ret;
> -}
> -
> -void intel_pipe_config_sanity_check(struct drm_i915_private *dev_priv,
> -				    const struct intel_crtc_state *pipe_config)
> -{
> -	if (pipe_config->has_pch_encoder) {
> -		int fdi_dotclock = intel_dotclock_calculate(intel_fdi_link_freq(dev_priv, pipe_config),
> -							    &pipe_config->fdi_m_n);
> -		int dotclock = pipe_config->base.adjusted_mode.crtc_clock;
> -
> -		/*
> -		 * FDI already provided one idea for the dotclock.
> -		 * Yell if the encoder disagrees.
> -		 */
> -		WARN(!intel_fuzzy_clock_check(fdi_dotclock, dotclock),
> -		     "FDI dotclock and encoder dotclock mismatch, fdi: %i, encoder: %i\n",
> -		     fdi_dotclock, dotclock);
> -	}
> -}
> -
>  static void update_scanline_offset(const struct intel_crtc_state *crtc_state)
>  {
>  	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> index 77767c..ed853b2 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -1668,17 +1668,12 @@ int intel_get_pipe_from_crtc_id_ioctl(struct drm_device *dev, void *data,
>  				      struct drm_file *file_priv);
>  enum transcoder intel_pipe_to_cpu_transcoder(struct drm_i915_private *dev_priv,
>  					     enum pipe pipe);
> -void intel_pipe_config_sanity_check(struct drm_i915_private *dev_priv,
> -				    const struct intel_crtc_state *pipe_config);
> -bool
> -intel_pipe_config_compare(struct drm_i915_private *dev_priv,
> -			  struct intel_crtc_state *current_config,
> -			  struct intel_crtc_state *pipe_config,
> -			  bool adjust);
>  void intel_dump_pipe_config(struct intel_crtc *crtc,
>  			    struct intel_crtc_state *pipe_config,
>  			    const char *context);
>  void intel_crtc_compute_pixel_rate(struct intel_crtc_state *crtc_state);
> +u32 intel_fdi_link_freq(struct drm_i915_private *dev_priv,
> +			const struct intel_crtc_state *pipe_config);
>  static inline bool
>  intel_crtc_has_type(const struct intel_crtc_state *crtc_state,
>  		    enum intel_output_type type)
> diff --git a/drivers/gpu/drm/i915/intel_verify.c b/drivers/gpu/drm/i915/intel_verify.c
> index 4c8990..9785ad 100644
> --- a/drivers/gpu/drm/i915/intel_verify.c
> +++ b/drivers/gpu/drm/i915/intel_verify.c
> @@ -10,6 +10,471 @@
>  #include "intel_pm.h"
>  #include "intel_verify.h"
>  
> +static bool intel_fuzzy_clock_check(int clock1, int clock2)
> +{
> +	int diff;
> +
> +	if (clock1 == clock2)
> +		return true;
> +
> +	if (!clock1 || !clock2)
> +		return false;
> +
> +	diff = abs(clock1 - clock2);
> +
> +	if (((((diff + clock1 + clock2) * 100)) / (clock1 + clock2)) < 105)
> +		return true;
> +
> +	return false;
> +}
> +
> +static bool
> +intel_compare_m_n(unsigned int m, unsigned int n,
> +		  unsigned int m2, unsigned int n2,
> +		  bool exact)
> +{
> +	if (m == m2 && n == n2)
> +		return true;
> +
> +	if (exact || !m || !n || !m2 || !n2)
> +		return false;
> +
> +	BUILD_BUG_ON(DATA_LINK_M_N_MASK > INT_MAX);
> +
> +	if (n > n2) {
> +		while (n > n2) {
> +			m2 <<= 1;
> +			n2 <<= 1;
> +		}
> +	} else if (n < n2) {
> +		while (n < n2) {
> +			m <<= 1;
> +			n <<= 1;
> +		}
> +	}
> +
> +	if (n != n2)
> +		return false;
> +
> +	return intel_fuzzy_clock_check(m, m2);
> +}
> +
> +static bool
> +intel_compare_link_m_n(const struct intel_link_m_n *m_n,
> +		       struct intel_link_m_n *m2_n2,
> +		       bool adjust)
> +{
> +	if (m_n->tu == m2_n2->tu &&
> +	    intel_compare_m_n(m_n->gmch_m, m_n->gmch_n,
> +			      m2_n2->gmch_m, m2_n2->gmch_n, !adjust) &&
> +	    intel_compare_m_n(m_n->link_m, m_n->link_n,
> +			      m2_n2->link_m, m2_n2->link_n, !adjust)) {
> +		if (adjust)
> +			*m2_n2 = *m_n;
> +
> +		return true;
> +	}
> +
> +	return false;
> +}
> +
> +static bool
> +intel_compare_infoframe(const union hdmi_infoframe *a,
> +			const union hdmi_infoframe *b)
> +{
> +	return memcmp(a, b, sizeof(*a)) == 0;
> +}
> +
> +static void
> +pipe_config_infoframe_err(struct drm_i915_private *dev_priv,
> +			  bool adjust, const char *name,
> +			  const union hdmi_infoframe *a,
> +			  const union hdmi_infoframe *b)
> +{
> +	if (adjust) {
> +		if ((drm_debug & DRM_UT_KMS) == 0)
> +			return;
> +
> +		drm_dbg(DRM_UT_KMS, "mismatch in %s infoframe", name);
> +		drm_dbg(DRM_UT_KMS, "expected:");
> +		hdmi_infoframe_log(KERN_DEBUG, dev_priv->drm.dev, a);
> +		drm_dbg(DRM_UT_KMS, "found");
> +		hdmi_infoframe_log(KERN_DEBUG, dev_priv->drm.dev, b);
> +	} else {
> +		drm_err("mismatch in %s infoframe", name);
> +		drm_err("expected:");
> +		hdmi_infoframe_log(KERN_ERR, dev_priv->drm.dev, a);
> +		drm_err("found");
> +		hdmi_infoframe_log(KERN_ERR, dev_priv->drm.dev, b);
> +	}
> +}
> +
> +static void __printf(3, 4)
> +pipe_config_err(bool adjust, const char *name, const char *format, ...)
> +{
> +	struct va_format vaf;
> +	va_list args;
> +
> +	va_start(args, format);
> +	vaf.fmt = format;
> +	vaf.va = &args;
> +
> +	if (adjust)
> +		drm_dbg(DRM_UT_KMS, "mismatch in %s %pV", name, &vaf);
> +	else
> +		drm_err("mismatch in %s %pV", name, &vaf);
> +
> +	va_end(args);
> +}
> +
> +static bool fastboot_enabled(struct drm_i915_private *dev_priv)
> +{
> +	if (i915_modparams.fastboot != -1)
> +		return i915_modparams.fastboot;
> +
> +	/* Enable fastboot by default on Skylake and newer */
> +	if (INTEL_GEN(dev_priv) >= 9)
> +		return true;
> +
> +	/* Enable fastboot by default on VLV and CHV */
> +	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
> +		return true;
> +
> +	/* Disabled by default on all others */
> +	return false;
> +}
> +
> +bool
> +intel_pipe_config_compare(struct drm_i915_private *dev_priv,
> +			  struct intel_crtc_state *current_config,
> +			  struct intel_crtc_state *pipe_config,
> +			  bool adjust)
> +{
> +	bool ret = true;
> +	bool fixup_inherited = adjust &&
> +		(current_config->base.mode.private_flags & I915_MODE_FLAG_INHERITED) &&
> +		!(pipe_config->base.mode.private_flags & I915_MODE_FLAG_INHERITED);
> +
> +	if (fixup_inherited && !fastboot_enabled(dev_priv)) {
> +		DRM_DEBUG_KMS("initial modeset and fastboot not set\n");
> +		ret = false;
> +	}
> +
> +#define PIPE_CONF_CHECK_X(name) do { \
> +	if (current_config->name != pipe_config->name) { \
> +		pipe_config_err(adjust, __stringify(name), \
> +			  "(expected 0x%08x, found 0x%08x)\n", \
> +			  current_config->name, \
> +			  pipe_config->name); \
> +		ret = false; \
> +	} \
> +} while (0)
> +
> +#define PIPE_CONF_CHECK_I(name) do { \
> +	if (current_config->name != pipe_config->name) { \
> +		pipe_config_err(adjust, __stringify(name), \
> +			  "(expected %i, found %i)\n", \
> +			  current_config->name, \
> +			  pipe_config->name); \
> +		ret = false; \
> +	} \
> +} while (0)
> +
> +#define PIPE_CONF_CHECK_BOOL(name) do { \
> +	if (current_config->name != pipe_config->name) { \
> +		pipe_config_err(adjust, __stringify(name), \
> +			  "(expected %s, found %s)\n", \
> +			  yesno(current_config->name), \
> +			  yesno(pipe_config->name)); \
> +		ret = false; \
> +	} \
> +} while (0)
> +
> +/*
> + * Checks state where we only read out the enabling, but not the entire
> + * state itself (like full infoframes or ELD for audio). These states
> + * require a full modeset on bootup to fix up.
> + */
> +#define PIPE_CONF_CHECK_BOOL_INCOMPLETE(name) do { \
> +	if (!fixup_inherited || (!current_config->name && !pipe_config->name)) { \
> +		PIPE_CONF_CHECK_BOOL(name); \
> +	} else { \
> +		pipe_config_err(adjust, __stringify(name), \
> +			  "unable to verify whether state matches exactly, forcing modeset (expected %s, found %s)\n", \
> +			  yesno(current_config->name), \
> +			  yesno(pipe_config->name)); \
> +		ret = false; \
> +	} \
> +} while (0)
> +
> +#define PIPE_CONF_CHECK_P(name) do { \
> +	if (current_config->name != pipe_config->name) { \
> +		pipe_config_err(adjust, __stringify(name), \
> +			  "(expected %p, found %p)\n", \
> +			  current_config->name, \
> +			  pipe_config->name); \
> +		ret = false; \
> +	} \
> +} while (0)
> +
> +#define PIPE_CONF_CHECK_M_N(name) do { \
> +	if (!intel_compare_link_m_n(&current_config->name, \
> +				    &pipe_config->name,\
> +				    adjust)) { \
> +		pipe_config_err(adjust, __stringify(name), \
> +			  "(expected tu %i gmch %i/%i link %i/%i, " \
> +			  "found tu %i, gmch %i/%i link %i/%i)\n", \
> +			  current_config->name.tu, \
> +			  current_config->name.gmch_m, \
> +			  current_config->name.gmch_n, \
> +			  current_config->name.link_m, \
> +			  current_config->name.link_n, \
> +			  pipe_config->name.tu, \
> +			  pipe_config->name.gmch_m, \
> +			  pipe_config->name.gmch_n, \
> +			  pipe_config->name.link_m, \
> +			  pipe_config->name.link_n); \
> +		ret = false; \
> +	} \
> +} while (0)
> +
> +/* This is required for BDW+ where there is only one set of registers for
> + * switching between high and low RR.
> + * This macro can be used whenever a comparison has to be made between one
> + * hw state and multiple sw state variables.
> + */
> +#define PIPE_CONF_CHECK_M_N_ALT(name, alt_name) do { \
> +	if (!intel_compare_link_m_n(&current_config->name, \
> +				    &pipe_config->name, adjust) && \
> +	    !intel_compare_link_m_n(&current_config->alt_name, \
> +				    &pipe_config->name, adjust)) { \
> +		pipe_config_err(adjust, __stringify(name), \
> +			  "(expected tu %i gmch %i/%i link %i/%i, " \
> +			  "or tu %i gmch %i/%i link %i/%i, " \
> +			  "found tu %i, gmch %i/%i link %i/%i)\n", \
> +			  current_config->name.tu, \
> +			  current_config->name.gmch_m, \
> +			  current_config->name.gmch_n, \
> +			  current_config->name.link_m, \
> +			  current_config->name.link_n, \
> +			  current_config->alt_name.tu, \
> +			  current_config->alt_name.gmch_m, \
> +			  current_config->alt_name.gmch_n, \
> +			  current_config->alt_name.link_m, \
> +			  current_config->alt_name.link_n, \
> +			  pipe_config->name.tu, \
> +			  pipe_config->name.gmch_m, \
> +			  pipe_config->name.gmch_n, \
> +			  pipe_config->name.link_m, \
> +			  pipe_config->name.link_n); \
> +		ret = false; \
> +	} \
> +} while (0)
> +
> +#define PIPE_CONF_CHECK_FLAGS(name, mask) do { \
> +	if ((current_config->name ^ pipe_config->name) & (mask)) { \
> +		pipe_config_err(adjust, __stringify(name), \
> +			  "(%x) (expected %i, found %i)\n", \
> +			  (mask), \
> +			  current_config->name & (mask), \
> +			  pipe_config->name & (mask)); \
> +		ret = false; \
> +	} \
> +} while (0)
> +
> +#define PIPE_CONF_CHECK_CLOCK_FUZZY(name) do { \
> +	if (!intel_fuzzy_clock_check(current_config->name, pipe_config->name)) { \
> +		pipe_config_err(adjust, __stringify(name), \
> +			  "(expected %i, found %i)\n", \
> +			  current_config->name, \
> +			  pipe_config->name); \
> +		ret = false; \
> +	} \
> +} while (0)
> +
> +#define PIPE_CONF_CHECK_INFOFRAME(name) do { \
> +	if (!intel_compare_infoframe(&current_config->infoframes.name, \
> +				     &pipe_config->infoframes.name)) { \
> +		pipe_config_infoframe_err(dev_priv, adjust, __stringify(name), \
> +					  &current_config->infoframes.name, \
> +					  &pipe_config->infoframes.name); \
> +		ret = false; \
> +	} \
> +} while (0)
> +
> +#define PIPE_CONF_QUIRK(quirk) \
> +	((current_config->quirks | pipe_config->quirks) & (quirk))
> +
> +	PIPE_CONF_CHECK_I(cpu_transcoder);
> +
> +	PIPE_CONF_CHECK_BOOL(has_pch_encoder);
> +	PIPE_CONF_CHECK_I(fdi_lanes);
> +	PIPE_CONF_CHECK_M_N(fdi_m_n);
> +
> +	PIPE_CONF_CHECK_I(lane_count);
> +	PIPE_CONF_CHECK_X(lane_lat_optim_mask);
> +
> +	if (INTEL_GEN(dev_priv) < 8) {
> +		PIPE_CONF_CHECK_M_N(dp_m_n);
> +
> +		if (current_config->has_drrs)
> +			PIPE_CONF_CHECK_M_N(dp_m2_n2);
> +	} else
> +		PIPE_CONF_CHECK_M_N_ALT(dp_m_n, dp_m2_n2);
> +
> +	PIPE_CONF_CHECK_X(output_types);
> +
> +	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_hdisplay);
> +	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_htotal);
> +	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_hblank_start);
> +	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_hblank_end);
> +	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_hsync_start);
> +	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_hsync_end);
> +
> +	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_vdisplay);
> +	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_vtotal);
> +	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_vblank_start);
> +	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_vblank_end);
> +	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_vsync_start);
> +	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_vsync_end);
> +
> +	PIPE_CONF_CHECK_I(pixel_multiplier);
> +	PIPE_CONF_CHECK_I(output_format);
> +	PIPE_CONF_CHECK_BOOL(has_hdmi_sink);
> +	if ((INTEL_GEN(dev_priv) < 8 && !IS_HASWELL(dev_priv)) ||
> +	    IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
> +		PIPE_CONF_CHECK_BOOL(limited_color_range);
> +
> +	PIPE_CONF_CHECK_BOOL(hdmi_scrambling);
> +	PIPE_CONF_CHECK_BOOL(hdmi_high_tmds_clock_ratio);
> +	PIPE_CONF_CHECK_BOOL_INCOMPLETE(has_infoframe);
> +
> +	PIPE_CONF_CHECK_BOOL_INCOMPLETE(has_audio);
> +
> +	PIPE_CONF_CHECK_FLAGS(base.adjusted_mode.flags,
> +			      DRM_MODE_FLAG_INTERLACE);
> +
> +	if (!PIPE_CONF_QUIRK(PIPE_CONFIG_QUIRK_MODE_SYNC_FLAGS)) {
> +		PIPE_CONF_CHECK_FLAGS(base.adjusted_mode.flags,
> +				      DRM_MODE_FLAG_PHSYNC);
> +		PIPE_CONF_CHECK_FLAGS(base.adjusted_mode.flags,
> +				      DRM_MODE_FLAG_NHSYNC);
> +		PIPE_CONF_CHECK_FLAGS(base.adjusted_mode.flags,
> +				      DRM_MODE_FLAG_PVSYNC);
> +		PIPE_CONF_CHECK_FLAGS(base.adjusted_mode.flags,
> +				      DRM_MODE_FLAG_NVSYNC);
> +	}
> +
> +	PIPE_CONF_CHECK_X(gmch_pfit.control);
> +	/* pfit ratios are autocomputed by the hw on gen4+ */
> +	if (INTEL_GEN(dev_priv) < 4)
> +		PIPE_CONF_CHECK_X(gmch_pfit.pgm_ratios);
> +	PIPE_CONF_CHECK_X(gmch_pfit.lvds_border_bits);
> +
> +	if (!adjust) {
> +		PIPE_CONF_CHECK_I(pipe_src_w);
> +		PIPE_CONF_CHECK_I(pipe_src_h);
> +
> +		PIPE_CONF_CHECK_BOOL(pch_pfit.enabled);
> +		if (current_config->pch_pfit.enabled) {
> +			PIPE_CONF_CHECK_X(pch_pfit.pos);
> +			PIPE_CONF_CHECK_X(pch_pfit.size);
> +		}
> +
> +		PIPE_CONF_CHECK_I(scaler_state.scaler_id);
> +		PIPE_CONF_CHECK_CLOCK_FUZZY(pixel_rate);
> +
> +		PIPE_CONF_CHECK_X(gamma_mode);
> +		if (IS_CHERRYVIEW(dev_priv))
> +			PIPE_CONF_CHECK_X(cgm_mode);
> +		else
> +			PIPE_CONF_CHECK_X(csc_mode);
> +		PIPE_CONF_CHECK_BOOL(gamma_enable);
> +		PIPE_CONF_CHECK_BOOL(csc_enable);
> +	}
> +
> +	PIPE_CONF_CHECK_BOOL(double_wide);
> +
> +	PIPE_CONF_CHECK_P(shared_dpll);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.dpll);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.dpll_md);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.fp0);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.fp1);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.wrpll);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.spll);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.ctrl1);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.cfgcr1);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.cfgcr2);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.cfgcr0);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.ebb0);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.ebb4);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.pll0);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.pll1);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.pll2);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.pll3);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.pll6);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.pll8);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.pll9);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.pll10);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.pcsdw12);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.mg_refclkin_ctl);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.mg_clktop2_coreclkctl1);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.mg_clktop2_hsclkctl);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_div0);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_div1);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_lf);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_frac_lock);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_ssc);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_bias);
> +	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_tdc_coldst_bias);
> +
> +	PIPE_CONF_CHECK_X(dsi_pll.ctrl);
> +	PIPE_CONF_CHECK_X(dsi_pll.div);
> +
> +	if (IS_G4X(dev_priv) || INTEL_GEN(dev_priv) >= 5)
> +		PIPE_CONF_CHECK_I(pipe_bpp);
> +
> +	PIPE_CONF_CHECK_CLOCK_FUZZY(base.adjusted_mode.crtc_clock);
> +	PIPE_CONF_CHECK_CLOCK_FUZZY(port_clock);
> +
> +	PIPE_CONF_CHECK_I(min_voltage_level);
> +
> +	PIPE_CONF_CHECK_X(infoframes.enable);
> +	PIPE_CONF_CHECK_X(infoframes.gcp);
> +	PIPE_CONF_CHECK_INFOFRAME(avi);
> +	PIPE_CONF_CHECK_INFOFRAME(spd);
> +	PIPE_CONF_CHECK_INFOFRAME(hdmi);
> +
> +#undef PIPE_CONF_CHECK_X
> +#undef PIPE_CONF_CHECK_I
> +#undef PIPE_CONF_CHECK_BOOL
> +#undef PIPE_CONF_CHECK_BOOL_INCOMPLETE
> +#undef PIPE_CONF_CHECK_P
> +#undef PIPE_CONF_CHECK_FLAGS
> +#undef PIPE_CONF_CHECK_CLOCK_FUZZY
> +#undef PIPE_CONF_QUIRK
> +
> +	return ret;
> +}
> +
> +void intel_pipe_config_sanity_check(struct drm_i915_private *dev_priv,
> +				    const struct intel_crtc_state *pipe_config)
> +{
> +	if (pipe_config->has_pch_encoder) {
> +		int fdi_dotclock = intel_dotclock_calculate(intel_fdi_link_freq(dev_priv, pipe_config),
> +							    &pipe_config->fdi_m_n);
> +		int dotclock = pipe_config->base.adjusted_mode.crtc_clock;
> +
> +		/*
> +		 * FDI already provided one idea for the dotclock.
> +		 * Yell if the encoder disagrees.
> +		 */
> +		WARN(!intel_fuzzy_clock_check(fdi_dotclock, dotclock),
> +		     "FDI dotclock and encoder dotclock mismatch, fdi: %i, encoder: %i\n",
> +		     fdi_dotclock, dotclock);
> +	}
> +}
> +
>  static void verify_wm_state(struct drm_crtc *crtc,
>  			    struct drm_crtc_state *new_state)
>  {
> diff --git a/drivers/gpu/drm/i915/intel_verify.h b/drivers/gpu/drm/i915/intel_verify.h
> index 4b751ea..faaf8f 100644
> --- a/drivers/gpu/drm/i915/intel_verify.h
> +++ b/drivers/gpu/drm/i915/intel_verify.h
> @@ -10,7 +10,15 @@ struct drm_atomic_state;
>  struct drm_crtc;
>  struct drm_crtc_state;
>  struct drm_device;
> +struct drm_i915_private;
> +struct intel_crtc_state;
>  
> +void intel_pipe_config_sanity_check(struct drm_i915_private *dev_priv,
> +				    const struct intel_crtc_state *pipe_config);
> +bool intel_pipe_config_compare(struct drm_i915_private *dev_priv,
> +			       struct intel_crtc_state *current_config,
> +			       struct intel_crtc_state *pipe_config,
> +			       bool adjust);
>  void intel_verify_modeset_crtc(struct drm_crtc *crtc,
>  			       struct drm_atomic_state *state,
>  			       struct drm_crtc_state *old_state,
> -- 
> 2.20.1
> 
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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