Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 5505a244 authored by Gaurav K Singh's avatar Gaurav K Singh Committed by Daniel Vetter
Browse files

drm/i915: New functions added for enabling & disabling MIPI Port Ctrl reg 



This patch is in preparation for the DSI dual link
port enable and disable related changes.

Signed-off-by: default avatarGaurav K Singh <gaurav.k.singh@intel.com>
Signed-off-by: default avatarShobhit Kumar <shobhit.kumar@intel.com>
Reviewed-by: default avatarJani Nikula <jani.nikula@intel.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 2fcffe19

drivers/gpu/drm/i915/intel_dsi.c

+32 −11
Original line number Diff line number Diff line
@@ -102,6 +102,36 @@ static bool intel_dsi_compute_config(struct intel_encoder *encoder, 
	return true;

}



static void intel_dsi_port_enable(struct intel_encoder *encoder)

{

	struct drm_device *dev = encoder->base.dev;

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);

	struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);

	enum port port = intel_dsi_pipe_to_port(intel_crtc->pipe);

	u32 temp;



	/* assert ip_tg_enable signal */

	temp = I915_READ(MIPI_PORT_CTRL(port)) & ~LANE_CONFIGURATION_MASK;

	temp = temp | intel_dsi->port_bits;

	I915_WRITE(MIPI_PORT_CTRL(port), temp | DPI_ENABLE);

	POSTING_READ(MIPI_PORT_CTRL(port));

}



static void intel_dsi_port_disable(struct intel_encoder *encoder)

{

	struct drm_device *dev = encoder->base.dev;

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);

	enum port port = intel_dsi_pipe_to_port(intel_crtc->pipe);

	u32 temp;



	/* de-assert ip_tg_enable signal */

	temp = I915_READ(MIPI_PORT_CTRL(port));

	I915_WRITE(MIPI_PORT_CTRL(port), temp & ~DPI_ENABLE);

	POSTING_READ(MIPI_PORT_CTRL(port));

}



static void intel_dsi_device_ready(struct intel_encoder *encoder)

{

	struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
@@ -141,7 +171,6 @@ static void intel_dsi_enable(struct intel_encoder *encoder) 
	struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);

	struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);

	enum port port = intel_dsi_pipe_to_port(intel_crtc->pipe);

	u32 temp;



	DRM_DEBUG_KMS("\n");
@@ -157,11 +186,7 @@ static void intel_dsi_enable(struct intel_encoder *encoder) 


		wait_for_dsi_fifo_empty(intel_dsi);



		/* assert ip_tg_enable signal */

		temp = I915_READ(MIPI_PORT_CTRL(port)) & ~LANE_CONFIGURATION_MASK;

		temp = temp | intel_dsi->port_bits;

		I915_WRITE(MIPI_PORT_CTRL(port), temp | DPI_ENABLE);

		POSTING_READ(MIPI_PORT_CTRL(port));

		intel_dsi_port_enable(encoder);

	}

}
@@ -245,11 +270,7 @@ static void intel_dsi_disable(struct intel_encoder *encoder) 
	if (is_vid_mode(intel_dsi)) {

		wait_for_dsi_fifo_empty(intel_dsi);



		/* de-assert ip_tg_enable signal */

		temp = I915_READ(MIPI_PORT_CTRL(port));

		I915_WRITE(MIPI_PORT_CTRL(port), temp & ~DPI_ENABLE);

		POSTING_READ(MIPI_PORT_CTRL(port));



		intel_dsi_port_disable(encoder);

		msleep(2);

	}