From ee27921824e6ad0ca2d8e5abfa12cf4d853ded6c Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Wed, 8 Jul 2015 23:45:57 +0300 Subject: [PATCH] drm/i915: Enable DPIO SUS clock gating on CHV MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit CHV has supports some form of automagic clock gating for the DPIO SUS clock. We can simply enable the magic bits and the hardware should take care of the rest. Signed-off-by: Ville Syrjälä Reviewed-by: Deepak S Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_reg.h | 4 ++++ drivers/gpu/drm/i915/intel_runtime_pm.c | 3 ++- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 6918ffa..6ed7141 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -1143,6 +1143,10 @@ enum skl_disp_power_wells { #define CHV_CMN_DW28 0x8170 #define DPIO_CL1POWERDOWNEN (1 << 23) #define DPIO_DYNPWRDOWNEN_CH0 (1 << 22) +#define DPIO_SUS_CLK_CONFIG_ON (0 << 0) +#define DPIO_SUS_CLK_CONFIG_CLKREQ (1 << 0) +#define DPIO_SUS_CLK_CONFIG_GATE (2 << 0) +#define DPIO_SUS_CLK_CONFIG_GATE_CLKREQ (3 << 0) #define CHV_CMN_DW30 0x8178 #define DPIO_LRC_BYPASS (1 << 3) diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c index 4a43885..ef043b2 100644 --- a/drivers/gpu/drm/i915/intel_runtime_pm.c +++ b/drivers/gpu/drm/i915/intel_runtime_pm.c @@ -988,7 +988,8 @@ static void chv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv, /* Enable dynamic power down */ tmp = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW28); - tmp |= DPIO_DYNPWRDOWNEN_CH0 | DPIO_CL1POWERDOWNEN; + tmp |= DPIO_DYNPWRDOWNEN_CH0 | DPIO_CL1POWERDOWNEN | + DPIO_SUS_CLK_CONFIG_GATE_CLKREQ; vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW28, tmp); if (power_well->data == PUNIT_POWER_WELL_DPIO_CMN_BC) { -- 2.7.4