diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_cdclk.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_cdclk.c | 129 |
1 files changed, 96 insertions, 33 deletions
diff --git a/drivers/gpu/drm/i915/intel_cdclk.c b/drivers/gpu/drm/i915/intel_cdclk.c index 9c5ceb98d48f..ee788d5be5e3 100644 --- a/drivers/gpu/drm/i915/intel_cdclk.c +++ b/drivers/gpu/drm/i915/intel_cdclk.c @@ -858,7 +858,7 @@ static void skl_get_cdclk(struct drm_i915_private *dev_priv, skl_dpll0_update(dev_priv, cdclk_state); - cdclk_state->cdclk = cdclk_state->ref; + cdclk_state->cdclk = cdclk_state->bypass = cdclk_state->ref; if (cdclk_state->vco == 0) goto out; @@ -931,16 +931,10 @@ static void skl_set_preferred_cdclk_vco(struct drm_i915_private *dev_priv, static void skl_dpll0_enable(struct drm_i915_private *dev_priv, int vco) { - int min_cdclk = skl_calc_cdclk(0, vco); u32 val; WARN_ON(vco != 8100000 && vco != 8640000); - /* select the minimum CDCLK before enabling DPLL 0 */ - val = CDCLK_FREQ_337_308 | skl_cdclk_decimal(min_cdclk); - I915_WRITE(CDCLK_CTL, val); - POSTING_READ(CDCLK_CTL); - /* * We always enable DPLL0 with the lowest link rate possible, but still * taking into account the VCO required to operate the eDP panel at the @@ -994,7 +988,7 @@ static void skl_set_cdclk(struct drm_i915_private *dev_priv, { int cdclk = cdclk_state->cdclk; int vco = cdclk_state->vco; - u32 freq_select; + u32 freq_select, cdclk_ctl; int ret; mutex_lock(&dev_priv->pcu_lock); @@ -1009,10 +1003,10 @@ static void skl_set_cdclk(struct drm_i915_private *dev_priv, return; } - /* set CDCLK_CTL */ + /* Choose frequency for this cdclk */ switch (cdclk) { default: - WARN_ON(cdclk != dev_priv->cdclk.hw.ref); + WARN_ON(cdclk != dev_priv->cdclk.hw.bypass); WARN_ON(vco != 0); /* fall through */ case 308571: @@ -1036,10 +1030,33 @@ static void skl_set_cdclk(struct drm_i915_private *dev_priv, dev_priv->cdclk.hw.vco != vco) skl_dpll0_disable(dev_priv); + cdclk_ctl = I915_READ(CDCLK_CTL); + + if (dev_priv->cdclk.hw.vco != vco) { + /* Wa Display #1183: skl,kbl,cfl */ + cdclk_ctl &= ~(CDCLK_FREQ_SEL_MASK | CDCLK_FREQ_DECIMAL_MASK); + cdclk_ctl |= freq_select | skl_cdclk_decimal(cdclk); + I915_WRITE(CDCLK_CTL, cdclk_ctl); + } + + /* Wa Display #1183: skl,kbl,cfl */ + cdclk_ctl |= CDCLK_DIVMUX_CD_OVERRIDE; + I915_WRITE(CDCLK_CTL, cdclk_ctl); + POSTING_READ(CDCLK_CTL); + if (dev_priv->cdclk.hw.vco != vco) skl_dpll0_enable(dev_priv, vco); - I915_WRITE(CDCLK_CTL, freq_select | skl_cdclk_decimal(cdclk)); + /* Wa Display #1183: skl,kbl,cfl */ + cdclk_ctl &= ~(CDCLK_FREQ_SEL_MASK | CDCLK_FREQ_DECIMAL_MASK); + I915_WRITE(CDCLK_CTL, cdclk_ctl); + + cdclk_ctl |= freq_select | skl_cdclk_decimal(cdclk); + I915_WRITE(CDCLK_CTL, cdclk_ctl); + + /* Wa Display #1183: skl,kbl,cfl */ + cdclk_ctl &= ~CDCLK_DIVMUX_CD_OVERRIDE; + I915_WRITE(CDCLK_CTL, cdclk_ctl); POSTING_READ(CDCLK_CTL); /* inform PCU of the change */ @@ -1068,7 +1085,7 @@ static void skl_sanitize_cdclk(struct drm_i915_private *dev_priv) /* Is PLL enabled and locked ? */ if (dev_priv->cdclk.hw.vco == 0 || - dev_priv->cdclk.hw.cdclk == dev_priv->cdclk.hw.ref) + dev_priv->cdclk.hw.cdclk == dev_priv->cdclk.hw.bypass) goto sanitize; /* DPLL okay; verify the cdclock @@ -1142,7 +1159,7 @@ void skl_uninit_cdclk(struct drm_i915_private *dev_priv) { struct intel_cdclk_state cdclk_state = dev_priv->cdclk.hw; - cdclk_state.cdclk = cdclk_state.ref; + cdclk_state.cdclk = cdclk_state.bypass; cdclk_state.vco = 0; cdclk_state.voltage_level = skl_calc_voltage_level(cdclk_state.cdclk); @@ -1182,7 +1199,7 @@ static int bxt_de_pll_vco(struct drm_i915_private *dev_priv, int cdclk) { int ratio; - if (cdclk == dev_priv->cdclk.hw.ref) + if (cdclk == dev_priv->cdclk.hw.bypass) return 0; switch (cdclk) { @@ -1207,7 +1224,7 @@ static int glk_de_pll_vco(struct drm_i915_private *dev_priv, int cdclk) { int ratio; - if (cdclk == dev_priv->cdclk.hw.ref) + if (cdclk == dev_priv->cdclk.hw.bypass) return 0; switch (cdclk) { @@ -1251,7 +1268,7 @@ static void bxt_get_cdclk(struct drm_i915_private *dev_priv, bxt_de_pll_update(dev_priv, cdclk_state); - cdclk_state->cdclk = cdclk_state->ref; + cdclk_state->cdclk = cdclk_state->bypass = cdclk_state->ref; if (cdclk_state->vco == 0) goto out; @@ -1335,7 +1352,7 @@ static void bxt_set_cdclk(struct drm_i915_private *dev_priv, /* cdclk = vco / 2 / div{1,1.5,2,4} */ switch (DIV_ROUND_CLOSEST(vco, cdclk)) { default: - WARN_ON(cdclk != dev_priv->cdclk.hw.ref); + WARN_ON(cdclk != dev_priv->cdclk.hw.bypass); WARN_ON(vco != 0); /* fall through */ case 2: @@ -1353,10 +1370,15 @@ static void bxt_set_cdclk(struct drm_i915_private *dev_priv, break; } - /* Inform power controller of upcoming frequency change */ + /* + * Inform power controller of upcoming frequency change. BSpec + * requires us to wait up to 150usec, but that leads to timeouts; + * the 2ms used here is based on experiment. + */ mutex_lock(&dev_priv->pcu_lock); - ret = sandybridge_pcode_write(dev_priv, HSW_PCODE_DE_WRITE_FREQ_REQ, - 0x80000000); + ret = sandybridge_pcode_write_timeout(dev_priv, + HSW_PCODE_DE_WRITE_FREQ_REQ, + 0x80000000, 150, 2); mutex_unlock(&dev_priv->pcu_lock); if (ret) { @@ -1387,8 +1409,15 @@ static void bxt_set_cdclk(struct drm_i915_private *dev_priv, I915_WRITE(CDCLK_CTL, val); mutex_lock(&dev_priv->pcu_lock); - ret = sandybridge_pcode_write(dev_priv, HSW_PCODE_DE_WRITE_FREQ_REQ, - cdclk_state->voltage_level); + /* + * The timeout isn't specified, the 2ms used here is based on + * experiment. + * FIXME: Waiting for the request completion could be delayed until + * the next PCODE request based on BSpec. + */ + ret = sandybridge_pcode_write_timeout(dev_priv, + HSW_PCODE_DE_WRITE_FREQ_REQ, + cdclk_state->voltage_level, 150, 2); mutex_unlock(&dev_priv->pcu_lock); if (ret) { @@ -1408,7 +1437,7 @@ static void bxt_sanitize_cdclk(struct drm_i915_private *dev_priv) intel_dump_cdclk_state(&dev_priv->cdclk.hw, "Current CDCLK"); if (dev_priv->cdclk.hw.vco == 0 || - dev_priv->cdclk.hw.cdclk == dev_priv->cdclk.hw.ref) + dev_priv->cdclk.hw.cdclk == dev_priv->cdclk.hw.bypass) goto sanitize; /* DPLL okay; verify the cdclock @@ -1497,7 +1526,7 @@ void bxt_uninit_cdclk(struct drm_i915_private *dev_priv) { struct intel_cdclk_state cdclk_state = dev_priv->cdclk.hw; - cdclk_state.cdclk = cdclk_state.ref; + cdclk_state.cdclk = cdclk_state.bypass; cdclk_state.vco = 0; cdclk_state.voltage_level = bxt_calc_voltage_level(cdclk_state.cdclk); @@ -1557,7 +1586,7 @@ static void cnl_get_cdclk(struct drm_i915_private *dev_priv, cnl_cdclk_pll_update(dev_priv, cdclk_state); - cdclk_state->cdclk = cdclk_state->ref; + cdclk_state->cdclk = cdclk_state->bypass = cdclk_state->ref; if (cdclk_state->vco == 0) goto out; @@ -1643,7 +1672,7 @@ static void cnl_set_cdclk(struct drm_i915_private *dev_priv, /* cdclk = vco / 2 / div{1,2} */ switch (DIV_ROUND_CLOSEST(vco, cdclk)) { default: - WARN_ON(cdclk != dev_priv->cdclk.hw.ref); + WARN_ON(cdclk != dev_priv->cdclk.hw.bypass); WARN_ON(vco != 0); /* fall through */ case 2: @@ -1688,7 +1717,7 @@ static int cnl_cdclk_pll_vco(struct drm_i915_private *dev_priv, int cdclk) { int ratio; - if (cdclk == dev_priv->cdclk.hw.ref) + if (cdclk == dev_priv->cdclk.hw.bypass) return 0; switch (cdclk) { @@ -1715,7 +1744,7 @@ static void cnl_sanitize_cdclk(struct drm_i915_private *dev_priv) intel_dump_cdclk_state(&dev_priv->cdclk.hw, "Current CDCLK"); if (dev_priv->cdclk.hw.vco == 0 || - dev_priv->cdclk.hw.cdclk == dev_priv->cdclk.hw.ref) + dev_priv->cdclk.hw.cdclk == dev_priv->cdclk.hw.bypass) goto sanitize; /* DPLL okay; verify the cdclock @@ -1788,7 +1817,7 @@ void cnl_uninit_cdclk(struct drm_i915_private *dev_priv) { struct intel_cdclk_state cdclk_state = dev_priv->cdclk.hw; - cdclk_state.cdclk = cdclk_state.ref; + cdclk_state.cdclk = cdclk_state.bypass; cdclk_state.vco = 0; cdclk_state.voltage_level = cnl_calc_voltage_level(cdclk_state.cdclk); @@ -1829,9 +1858,10 @@ bool intel_cdclk_changed(const struct intel_cdclk_state *a, void intel_dump_cdclk_state(const struct intel_cdclk_state *cdclk_state, const char *context) { - DRM_DEBUG_DRIVER("%s %d kHz, VCO %d kHz, ref %d kHz, voltage level %d\n", + DRM_DEBUG_DRIVER("%s %d kHz, VCO %d kHz, ref %d kHz, bypass %d kHz, voltage level %d\n", context, cdclk_state->cdclk, cdclk_state->vco, - cdclk_state->ref, cdclk_state->voltage_level); + cdclk_state->ref, cdclk_state->bypass, + cdclk_state->voltage_level); } /** @@ -1923,6 +1953,14 @@ int intel_crtc_compute_min_cdclk(const struct intel_crtc_state *crtc_state) if (crtc_state->has_audio && INTEL_GEN(dev_priv) >= 9) min_cdclk = max(2 * 96000, min_cdclk); + /* + * On Valleyview some DSI panels lose (v|h)sync when the clock is lower + * than 320000KHz. + */ + if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DSI) && + IS_VALLEYVIEW(dev_priv)) + min_cdclk = max(320000, min_cdclk); + if (min_cdclk > dev_priv->max_cdclk_freq) { DRM_DEBUG_KMS("required cdclk (%d kHz) exceeds max (%d kHz)\n", min_cdclk, dev_priv->max_cdclk_freq); @@ -2317,6 +2355,30 @@ static int cnp_rawclk(struct drm_i915_private *dev_priv) return divider + fraction; } +static int icp_rawclk(struct drm_i915_private *dev_priv) +{ + u32 rawclk; + int divider, numerator, denominator, frequency; + + if (I915_READ(SFUSE_STRAP) & SFUSE_STRAP_RAW_FREQUENCY) { + frequency = 24000; + divider = 23; + numerator = 0; + denominator = 0; + } else { + frequency = 19200; + divider = 18; + numerator = 1; + denominator = 4; + } + + rawclk = CNP_RAWCLK_DIV(divider) | ICP_RAWCLK_NUM(numerator) | + ICP_RAWCLK_DEN(denominator); + + I915_WRITE(PCH_RAWCLK_FREQ, rawclk); + return frequency; +} + static int pch_rawclk(struct drm_i915_private *dev_priv) { return (I915_READ(PCH_RAWCLK_FREQ) & RAWCLK_FREQ_MASK) * 1000; @@ -2364,8 +2426,9 @@ static int g4x_hrawclk(struct drm_i915_private *dev_priv) */ void intel_update_rawclk(struct drm_i915_private *dev_priv) { - - if (HAS_PCH_CNP(dev_priv)) + if (HAS_PCH_ICP(dev_priv)) + dev_priv->rawclk_freq = icp_rawclk(dev_priv); + else if (HAS_PCH_CNP(dev_priv)) dev_priv->rawclk_freq = cnp_rawclk(dev_priv); else if (HAS_PCH_SPLIT(dev_priv)) dev_priv->rawclk_freq = pch_rawclk(dev_priv); |
