[Intel-gfx] [PATCH 2/6] drm/i915: Move the encoder vs. FDI dotclock check out from encoder .get_config()
Imre Deak
imre.deak at intel.com
Thu Feb 18 18:18:59 UTC 2016
On ke, 2016-02-17 at 21:41 +0200, ville.syrjala at linux.intel.com wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
> Currently we check if the encoder's idea of dotclock agrees with what
> we calculated based on the FDI parameters. We do this in the encoder
> .get_config() hooks, which isn't so nice in case the BIOS (or some
> other
> outside party) made a mess of the state and we're just trying to take
> over.
>
> So as a prep step to being able sanitize such a bogus state, move the
> the sanity check to just after we've read out the entire state. If
> we then need to sanitize a bad state, it should be easier to move the
> sanity check to occur after sanitation instead of before it.
>
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
Separating the get-config and check steps makes things more logical in
any case. Looks ok to me:
Reviewed-by: Imre Deak <imre.deak at intel.com>
> ---
> drivers/gpu/drm/i915/intel_crt.c | 10 +------
> drivers/gpu/drm/i915/intel_display.c | 57 ++++++++++++++++++++----
> ------------
> drivers/gpu/drm/i915/intel_dp.c | 11 ++-----
> drivers/gpu/drm/i915/intel_drv.h | 3 --
> drivers/gpu/drm/i915/intel_hdmi.c | 3 --
> drivers/gpu/drm/i915/intel_lvds.c | 8 +----
> drivers/gpu/drm/i915/intel_sdvo.c | 4 +--
> 7 files changed, 38 insertions(+), 58 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_crt.c
> b/drivers/gpu/drm/i915/intel_crt.c
> index e686a91a416e..f4c88d93a164 100644
> --- a/drivers/gpu/drm/i915/intel_crt.c
> +++ b/drivers/gpu/drm/i915/intel_crt.c
> @@ -120,17 +120,9 @@ static unsigned int intel_crt_get_flags(struct
> intel_encoder *encoder)
> static void intel_crt_get_config(struct intel_encoder *encoder,
> struct intel_crtc_state
> *pipe_config)
> {
> - struct drm_device *dev = encoder->base.dev;
> - int dotclock;
> -
> pipe_config->base.adjusted_mode.flags |=
> intel_crt_get_flags(encoder);
>
> - dotclock = pipe_config->port_clock;
> -
> - if (HAS_PCH_SPLIT(dev))
> - ironlake_check_encoder_dotclock(pipe_config,
> dotclock);
> -
> - pipe_config->base.adjusted_mode.crtc_clock = dotclock;
> + pipe_config->base.adjusted_mode.crtc_clock = pipe_config-
> >port_clock;
> }
>
> static void hsw_crt_get_config(struct intel_encoder *encoder,
> diff --git a/drivers/gpu/drm/i915/intel_display.c
> b/drivers/gpu/drm/i915/intel_display.c
> index f0f88061a9e5..99001e117517 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -224,12 +224,11 @@ static void intel_update_czclk(struct
> drm_i915_private *dev_priv)
> }
>
> static inline u32 /* units of 100MHz */
> -intel_fdi_link_freq(struct drm_device *dev)
> +intel_fdi_link_freq(struct drm_i915_private *dev_priv)
> {
> - if (IS_GEN5(dev)) {
> - struct drm_i915_private *dev_priv = dev-
> >dev_private;
> + if (IS_GEN5(dev_priv))
> return (I915_READ(FDI_PLL_BIOS_0) &
> FDI_PLL_FB_CLOCK_MASK) + 2;
> - } else
> + else
> return 27;
> }
>
> @@ -6589,7 +6588,7 @@ retry:
> * Hence the bw of each lane in terms of the mode signal
> * is:
> */
> - link_bw = intel_fdi_link_freq(dev) * MHz(100)/KHz(1)/10;
> + link_bw = intel_fdi_link_freq(to_i915(dev)) *
> MHz(100)/KHz(1)/10;
>
> fdi_dotclock = adjusted_mode->crtc_clock;
>
> @@ -6601,8 +6600,7 @@ retry:
> intel_link_compute_m_n(pipe_config->pipe_bpp, lane,
> fdi_dotclock,
> link_bw, &pipe_config->fdi_m_n);
>
> - ret = ironlake_check_fdi_lanes(intel_crtc->base.dev,
> - intel_crtc->pipe,
> pipe_config);
> + ret = ironlake_check_fdi_lanes(dev, intel_crtc->pipe,
> pipe_config);
> if (ret == -EINVAL && pipe_config->pipe_bpp > 6*3) {
> pipe_config->pipe_bpp -= 2*3;
> DRM_DEBUG_KMS("fdi link bw constraint, reducing pipe
> bpp to %i\n",
> @@ -10765,19 +10763,18 @@ int intel_dotclock_calculate(int link_freq,
> static void ironlake_pch_clock_get(struct intel_crtc *crtc,
> struct intel_crtc_state
> *pipe_config)
> {
> - struct drm_device *dev = crtc->base.dev;
> + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
>
> /* read out port_clock from the DPLL */
> i9xx_crtc_clock_get(crtc, pipe_config);
>
> /*
> - * This value does not include pixel_multiplier.
> - * We will check that port_clock and
> adjusted_mode.crtc_clock
> - * agree once we know their relationship in the encoder's
> - * get_config() function.
> + * In case there is an active pipe without active ports,
> + * we may need some idea for the dotclock anyway.
> + * Calculate one based on the FDI configuration.
> */
> pipe_config->base.adjusted_mode.crtc_clock =
> - intel_dotclock_calculate(intel_fdi_link_freq(dev) *
> 10000,
> + intel_dotclock_calculate(intel_fdi_link_freq(dev_pri
> v) * 10000,
> &pipe_config->fdi_m_n);
> }
>
> @@ -12788,6 +12785,24 @@ intel_pipe_config_compare(struct drm_device
> *dev,
> return ret;
> }
>
> +static 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) * 10000,
> + &pipe_co
> nfig->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 check_wm_state(struct drm_device *dev)
> {
> struct drm_i915_private *dev_priv = dev->dev_private;
> @@ -12961,6 +12976,8 @@ check_crtc_state(struct drm_device *dev,
> struct drm_atomic_state *old_state)
> if (!crtc->state->active)
> continue;
>
> + intel_pipe_config_sanity_check(dev_priv,
> pipe_config);
> +
> sw_config = to_intel_crtc_state(crtc->state);
> if (!intel_pipe_config_compare(dev, sw_config,
> pipe_config, false))
> {
> @@ -13033,18 +13050,6 @@ intel_modeset_check_state(struct drm_device
> *dev,
> check_shared_dpll_state(dev);
> }
>
> -void ironlake_check_encoder_dotclock(const struct intel_crtc_state
> *pipe_config,
> - int dotclock)
> -{
> - /*
> - * FDI already provided one idea for the dotclock.
> - * Yell if the encoder disagrees.
> - */
> - WARN(!intel_fuzzy_clock_check(pipe_config-
> >base.adjusted_mode.crtc_clock, dotclock),
> - "FDI dotclock and encoder dotclock mismatch, fdi: %i,
> encoder: %i\n",
> - pipe_config->base.adjusted_mode.crtc_clock, dotclock);
> -}
> -
> static void update_scanline_offset(struct intel_crtc *crtc)
> {
> struct drm_device *dev = crtc->base.dev;
> @@ -15847,6 +15852,8 @@ static void
> intel_modeset_readout_hw_state(struct drm_device *dev)
> drm_calc_timestamping_constants(&crtc->base,
> &crtc->base.hwmode);
> update_scanline_offset(crtc);
> }
> +
> + intel_pipe_config_sanity_check(dev_priv, crtc-
> >config);
> }
> }
>
> diff --git a/drivers/gpu/drm/i915/intel_dp.c
> b/drivers/gpu/drm/i915/intel_dp.c
> index cbc06596659a..f272b3541e00 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -2409,7 +2409,6 @@ static void intel_dp_get_config(struct
> intel_encoder *encoder,
> struct drm_i915_private *dev_priv = dev->dev_private;
> enum port port = dp_to_dig_port(intel_dp)->port;
> struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
> - int dotclock;
>
> tmp = I915_READ(intel_dp->output_reg);
>
> @@ -2459,13 +2458,9 @@ static void intel_dp_get_config(struct
> intel_encoder *encoder,
> pipe_config->port_clock = 270000;
> }
>
> - dotclock = intel_dotclock_calculate(pipe_config->port_clock,
> - &pipe_config->dp_m_n);
> -
> - if (HAS_PCH_SPLIT(dev_priv->dev) && port != PORT_A)
> - ironlake_check_encoder_dotclock(pipe_config,
> dotclock);
> -
> - pipe_config->base.adjusted_mode.crtc_clock = dotclock;
> + pipe_config->base.adjusted_mode.crtc_clock =
> + intel_dotclock_calculate(pipe_config->port_clock,
> + &pipe_config->dp_m_n);
>
> if (is_edp(intel_dp) && dev_priv->vbt.edp_bpp &&
> pipe_config->pipe_bpp > dev_priv->vbt.edp_bpp) {
> diff --git a/drivers/gpu/drm/i915/intel_drv.h
> b/drivers/gpu/drm/i915/intel_drv.h
> index f95f8b22939f..c25a8880b4e8 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -1197,9 +1197,6 @@ void intel_dp_get_m_n(struct intel_crtc *crtc,
> struct intel_crtc_state *pipe_config);
> void intel_dp_set_m_n(struct intel_crtc *crtc, enum link_m_n_set
> m_n);
> int intel_dotclock_calculate(int link_freq, const struct
> intel_link_m_n *m_n);
> -void
> -ironlake_check_encoder_dotclock(const struct intel_crtc_state
> *pipe_config,
> - int dotclock);
> bool bxt_find_best_dpll(struct intel_crtc_state *crtc_state, int
> target_clock,
> intel_clock_t *best_clock);
> int chv_calc_dpll_params(int refclk, intel_clock_t *pll_clock);
> diff --git a/drivers/gpu/drm/i915/intel_hdmi.c
> b/drivers/gpu/drm/i915/intel_hdmi.c
> index 80b44c054087..d8060e6251f8 100644
> --- a/drivers/gpu/drm/i915/intel_hdmi.c
> +++ b/drivers/gpu/drm/i915/intel_hdmi.c
> @@ -952,9 +952,6 @@ static void intel_hdmi_get_config(struct
> intel_encoder *encoder,
> if (pipe_config->pixel_multiplier)
> dotclock /= pipe_config->pixel_multiplier;
>
> - if (HAS_PCH_SPLIT(dev_priv->dev))
> - ironlake_check_encoder_dotclock(pipe_config,
> dotclock);
> -
> pipe_config->base.adjusted_mode.crtc_clock = dotclock;
> }
>
> diff --git a/drivers/gpu/drm/i915/intel_lvds.c
> b/drivers/gpu/drm/i915/intel_lvds.c
> index 30a8403a8f4f..b35342f7b969 100644
> --- a/drivers/gpu/drm/i915/intel_lvds.c
> +++ b/drivers/gpu/drm/i915/intel_lvds.c
> @@ -109,7 +109,6 @@ static void intel_lvds_get_config(struct
> intel_encoder *encoder,
> struct drm_i915_private *dev_priv = dev->dev_private;
> struct intel_lvds_encoder *lvds_encoder =
> to_lvds_encoder(&encoder->base);
> u32 tmp, flags = 0;
> - int dotclock;
>
> tmp = I915_READ(lvds_encoder->reg);
> if (tmp & LVDS_HSYNC_POLARITY)
> @@ -130,12 +129,7 @@ static void intel_lvds_get_config(struct
> intel_encoder *encoder,
> pipe_config->gmch_pfit.control |= tmp &
> PANEL_8TO6_DITHER_ENABLE;
> }
>
> - dotclock = pipe_config->port_clock;
> -
> - if (HAS_PCH_SPLIT(dev_priv->dev))
> - ironlake_check_encoder_dotclock(pipe_config,
> dotclock);
> -
> - pipe_config->base.adjusted_mode.crtc_clock = dotclock;
> + pipe_config->base.adjusted_mode.crtc_clock = pipe_config-
> >port_clock;
> }
>
> static void intel_pre_enable_lvds(struct intel_encoder *encoder)
> diff --git a/drivers/gpu/drm/i915/intel_sdvo.c
> b/drivers/gpu/drm/i915/intel_sdvo.c
> index 4ecc076c4041..fae64bc93c1b 100644
> --- a/drivers/gpu/drm/i915/intel_sdvo.c
> +++ b/drivers/gpu/drm/i915/intel_sdvo.c
> @@ -1398,12 +1398,10 @@ static void intel_sdvo_get_config(struct
> intel_encoder *encoder,
> }
>
> dotclock = pipe_config->port_clock;
> +
> if (pipe_config->pixel_multiplier)
> dotclock /= pipe_config->pixel_multiplier;
>
> - if (HAS_PCH_SPLIT(dev))
> - ironlake_check_encoder_dotclock(pipe_config,
> dotclock);
> -
> pipe_config->base.adjusted_mode.crtc_clock = dotclock;
>
> /* Cross check the port pixel multiplier with the sdvo
> encoder state. */
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