drm/i915: Disable DPOunit clock gating (20e5bf66) · Commits · 戴 / test

drivers/gpu/drm/i915/intel_dsi.c

+24 −2

Original line number	Diff line number	Diff line
		@@ -163,16 +163,31 @@ static void intel_dsi_enable(struct intel_encoder *encoder)

		static void intel_dsi_pre_enable(struct intel_encoder *encoder)
		{
		struct drm_device *dev = encoder->base.dev;
		struct drm_i915_private *dev_priv = dev->dev_private;
		struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
		struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
		enum pipe pipe = intel_crtc->pipe;
		u32 tmp;

		DRM_DEBUG_KMS("\n");

		if (intel_dsi->dev.dev_ops->panel_reset)
		intel_dsi->dev.dev_ops->panel_reset(&intel_dsi->dev);
		/* Disable DPOunit clock gating, can stall pipe
		* and we need DPLL REFA always enabled */
		tmp = I915_READ(DPLL(pipe));
		tmp \|= DPLL_REFA_CLK_ENABLE_VLV;
		I915_WRITE(DPLL(pipe), tmp);

		tmp = I915_READ(DSPCLK_GATE_D);
		tmp \|= DPOUNIT_CLOCK_GATE_DISABLE;
		I915_WRITE(DSPCLK_GATE_D, tmp);

		/* put device in ready state */
		intel_dsi_device_ready(encoder);

		if (intel_dsi->dev.dev_ops->panel_reset)
		intel_dsi->dev.dev_ops->panel_reset(&intel_dsi->dev);

		if (intel_dsi->dev.dev_ops->send_otp_cmds)
		intel_dsi->dev.dev_ops->send_otp_cmds(&intel_dsi->dev);

		@@ -251,14 +266,21 @@ static void intel_dsi_clear_device_ready(struct intel_encoder *encoder)

		vlv_disable_dsi_pll(encoder);
		}

		static void intel_dsi_post_disable(struct intel_encoder *encoder)
		{
		struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
		struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
		u32 val;

		DRM_DEBUG_KMS("\n");

		intel_dsi_clear_device_ready(encoder);

		val = I915_READ(DSPCLK_GATE_D);
		val &= ~DPOUNIT_CLOCK_GATE_DISABLE;
		I915_WRITE(DSPCLK_GATE_D, val);

		if (intel_dsi->dev.dev_ops->disable_panel_power)
		intel_dsi->dev.dev_ops->disable_panel_power(&intel_dsi->dev);
		}

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