Re: [RFC PATCH 04/12] drm/i915/dsi: call wait_for_dsi_fifo_empty() for each dsi port

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On 01/16/2015 05:57 PM, Jani Nikula wrote:
Add port parameter to wait_for_dsi_fifo_empty, and call it for each dsi
port.

We can now remove the transitional intel_dsi_pipe_to_port() function.

Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>

Reviewed-By: Shobhit Kumar <shobhit.kumar@xxxxxxxxx>


---
  drivers/gpu/drm/i915/intel_dsi.c | 17 ++++++++++-------
  drivers/gpu/drm/i915/intel_dsi.h | 12 ------------
  2 files changed, 10 insertions(+), 19 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c
index e82cf5f65c9a..9b0eaa9db845 100644
--- a/drivers/gpu/drm/i915/intel_dsi.c
+++ b/drivers/gpu/drm/i915/intel_dsi.c
@@ -42,13 +42,11 @@ static const struct intel_dsi_device intel_dsi_devices[] = {
  	},
  };

-static void wait_for_dsi_fifo_empty(struct intel_dsi *intel_dsi)
+static void wait_for_dsi_fifo_empty(struct intel_dsi *intel_dsi, enum port port)
  {
  	struct drm_encoder *encoder = &intel_dsi->base.base;
  	struct drm_device *dev = encoder->dev;
  	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
-	enum port port = intel_dsi_pipe_to_port(intel_crtc->pipe);
  	u32 mask;

  	mask = LP_CTRL_FIFO_EMPTY | HS_CTRL_FIFO_EMPTY |
@@ -230,7 +228,8 @@ static void intel_dsi_enable(struct intel_encoder *encoder)
  		if (intel_dsi->dev.dev_ops->enable)
  			intel_dsi->dev.dev_ops->enable(&intel_dsi->dev);

-		wait_for_dsi_fifo_empty(intel_dsi);
+		for_each_dsi_port(port, intel_dsi->ports)
+			wait_for_dsi_fifo_empty(intel_dsi, port);

  		intel_dsi_port_enable(encoder);
  	}
@@ -243,6 +242,7 @@ static void intel_dsi_pre_enable(struct intel_encoder *encoder)
  	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;
+	enum port port;
  	u32 tmp;

  	DRM_DEBUG_KMS("\n");
@@ -272,7 +272,8 @@ static void intel_dsi_pre_enable(struct intel_encoder *encoder)
  	if (intel_dsi->dev.dev_ops->send_otp_cmds)
  		intel_dsi->dev.dev_ops->send_otp_cmds(&intel_dsi->dev);

-	wait_for_dsi_fifo_empty(intel_dsi);
+	for_each_dsi_port(port, intel_dsi->ports)
+		wait_for_dsi_fifo_empty(intel_dsi, port);

  	/* Enable port in pre-enable phase itself because as per hw team
  	 * recommendation, port should be enabled befor plane & pipe */
@@ -315,7 +316,8 @@ static void intel_dsi_disable(struct intel_encoder *encoder)
  	DRM_DEBUG_KMS("\n");

  	if (is_vid_mode(intel_dsi)) {
-		wait_for_dsi_fifo_empty(intel_dsi);
+		for_each_dsi_port(port, intel_dsi->ports)
+			wait_for_dsi_fifo_empty(intel_dsi, port);

  		intel_dsi_port_disable(encoder);
  		msleep(2);
@@ -344,7 +346,8 @@ static void intel_dsi_disable(struct intel_encoder *encoder)
  	if (intel_dsi->dev.dev_ops->disable)
  		intel_dsi->dev.dev_ops->disable(&intel_dsi->dev);

-	wait_for_dsi_fifo_empty(intel_dsi);
+	for_each_dsi_port(port, intel_dsi->ports)
+		wait_for_dsi_fifo_empty(intel_dsi, port);
  }

  static void intel_dsi_clear_device_ready(struct intel_encoder *encoder)
diff --git a/drivers/gpu/drm/i915/intel_dsi.h b/drivers/gpu/drm/i915/intel_dsi.h
index 8fe2064dd804..2bb8c46c7889 100644
--- a/drivers/gpu/drm/i915/intel_dsi.h
+++ b/drivers/gpu/drm/i915/intel_dsi.h
@@ -137,18 +137,6 @@ struct intel_dsi {
  	u16 panel_pwr_cycle_delay;
  };

-/* XXX: Transitional before dual port configuration */
-static inline enum port intel_dsi_pipe_to_port(enum pipe pipe)
-{
-	if (pipe == PIPE_A)
-		return PORT_A;
-	else if (pipe == PIPE_B)
-		return PORT_C;
-
-	WARN(1, "DSI on pipe %c, assuming port C\n", pipe_name(pipe));
-	return PORT_C;
-}
-
  #define for_each_dsi_port(__port, __ports_mask) \
  	for ((__port) = PORT_A; (__port) < I915_MAX_PORTS; (__port)++)	\
  		if ((__ports_mask) & (1 << (__port)))

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