From 49a898bea5a00dafebd2f9ef374bdb024e16d34d Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Fri, 23 May 2014 13:16:44 -0700 Subject: [PATCH] drm/i915/vlv: move DPIO common reset de-assert into __vlv_set_power_well MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit We need to do this anytime we power gate the DPIO common well. Signed-off-by: Jesse Barnes Reviewed-by: Ville Syrjälä Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_display.c | 13 ---------- drivers/gpu/drm/i915/intel_pm.c | 39 +++++++++++++++++++++------- 2 files changed, 30 insertions(+), 22 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 186077176287..883c69a47a99 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -1525,19 +1525,6 @@ static void intel_reset_dpio(struct drm_device *dev) false); __vlv_set_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_BC, true); - - /* - * From VLV2A0_DP_eDP_DPIO_driver_vbios_notes_10.docx - - * 6. De-assert cmn_reset/side_reset. Same as VLV X0. - * a. GUnit 0x2110 bit[0] set to 1 (def 0) - * b. The other bits such as sfr settings / modesel may all - * be set to 0. - * - * This should only be done on init and resume from S3 with - * both PLLs disabled, or we risk losing DPIO and PLL - * synchronization. - */ - I915_WRITE(DPIO_CTL, I915_READ(DPIO_CTL) | DPIO_CMNRST); } } diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index e2d0d0b88466..7f5e86ff2b64 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -5908,15 +5908,22 @@ void __vlv_set_power_well(struct drm_i915_private *dev_priv, u32 state; u32 ctrl; - if (power_well_id == PUNIT_POWER_WELL_DPIO_CMN_BC && enable) { - /* - * Enable the CRI clock source so we can get at the display - * and the reference clock for VGA hotplug / manual detection. - */ - I915_WRITE(DPLL(PIPE_B), I915_READ(DPLL(PIPE_B)) | - DPLL_REFA_CLK_ENABLE_VLV | - DPLL_INTEGRATED_CRI_CLK_VLV); - udelay(1); /* >10ns for cmnreset, >0ns for sidereset */ + if (power_well_id == PUNIT_POWER_WELL_DPIO_CMN_BC) { + if (enable) { + /* + * Enable the CRI clock source so we can get at the + * display and the reference clock for VGA + * hotplug / manual detection. + */ + I915_WRITE(DPLL(PIPE_B), I915_READ(DPLL(PIPE_B)) | + DPLL_REFA_CLK_ENABLE_VLV | + DPLL_INTEGRATED_CRI_CLK_VLV); + udelay(1); /* >10ns for cmnreset, >0ns for sidereset */ + } else { + /* Assert common reset */ + I915_WRITE(DPIO_CTL, I915_READ(DPIO_CTL) & + ~DPIO_CMNRST); + } } mask = PUNIT_PWRGT_MASK(power_well_id); @@ -5945,6 +5952,20 @@ void __vlv_set_power_well(struct drm_i915_private *dev_priv, out: mutex_unlock(&dev_priv->rps.hw_lock); + + /* + * From VLV2A0_DP_eDP_DPIO_driver_vbios_notes_10.docx - + * 6. De-assert cmn_reset/side_reset. Same as VLV X0. + * a. GUnit 0x2110 bit[0] set to 1 (def 0) + * b. The other bits such as sfr settings / modesel may all + * be set to 0. + * + * This should only be done on init and resume from S3 with + * both PLLs disabled, or we risk losing DPIO and PLL + * synchronization. + */ + if (power_well_id == PUNIT_POWER_WELL_DPIO_CMN_BC && enable) + I915_WRITE(DPIO_CTL, I915_READ(DPIO_CTL) | DPIO_CMNRST); } static void vlv_set_power_well(struct drm_i915_private *dev_priv, -- 2.39.5