From e3b247da89f0adb04010f9dad6a3e41ed085d24e Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Wed, 17 Feb 2016 21:41:09 +0200 Subject: [PATCH] drm/i915: Move the encoder vs. FDI dotclock check out from encoder .get_config() MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Link: http://patchwork.freedesktop.org/patch/msgid/1455738073-14502-3-git-send-email-ville.syrjala@linux.intel.com Reviewed-by: Imre Deak --- 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 505fc5cf26f8..7fe13bcce6fc 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 adc034a531b3..992d4d568c11 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; } @@ -6680,7 +6679,7 @@ 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; @@ -6692,8 +6691,7 @@ 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", @@ -10831,19 +10829,18 @@ 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_priv) * 10000, &pipe_config->fdi_m_n); } @@ -12872,6 +12869,24 @@ 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_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 check_wm_state(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; @@ -13045,6 +13060,8 @@ 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)) { @@ -13117,18 +13134,6 @@ 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; @@ -16034,6 +16039,8 @@ 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 f6e4a87a9892..75acb1d15184 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -2422,7 +2422,6 @@ 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); @@ -2472,13 +2471,9 @@ 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 48f7e844f23a..859dfc5af28e 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -1219,9 +1219,6 @@ 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. */ -- 2.20.1