diff options
| author | Jesse Barnes <jbarnes@virtuousgeek.org> | 2014-05-23 13:16:44 -0700 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2014-06-05 08:52:37 +0200 |
| commit | f618e38dedb17e86278cc7eb9a6cef184893885d (patch) | |
| tree | fcc8bf7b24dbf3bf252a1a7275a60f4a5e787747 /drivers/gpu/drm/i915/intel_pm.c | |
| parent | f099a3c605724b2f848ed4edd318e20528761904 (diff) | |
drm/i915/vlv: move DPIO common reset de-assert into __vlv_set_power_well
We need to do this anytime we power gate the DPIO common well.
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_pm.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 39 |
1 files changed, 30 insertions, 9 deletions
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index c2cf9063dd7a..cca93d06894c 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -5715,15 +5715,22 @@ 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); @@ -5752,6 +5759,20 @@ 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, |