[Intel-gfx] [PATCH 5/9] drm/i915: SHUTDOWN & Turn ON packets to be sent for both MIPI Ports in case of dual link Configuration

[Gaurav K Singh]

Signed-off-by: Gaurav K Singh <gaurav.k.singh at intel.com>
Signed-off-by: Shobhit Kumar <shobhit.kumar at intel.com>
---
 drivers/gpu/drm/i915/intel_dsi_cmd.c |   35 ++++++++++++++++++++++------------
 1 file changed, 23 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_dsi_cmd.c b/drivers/gpu/drm/i915/intel_dsi_cmd.c
index eb698b1..a70656e 100644
--- a/drivers/gpu/drm/i915/intel_dsi_cmd.c
+++ b/drivers/gpu/drm/i915/intel_dsi_cmd.c
@@ -394,6 +394,7 @@ int dpi_send_cmd(struct intel_dsi *intel_dsi, u32 cmd, bool hs)
 	struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 	enum pipe pipe = intel_crtc->pipe;
 	u32 mask;
+	int count = 1;
 
 	/* XXX: pipe, hs */
 	if (hs)
@@ -401,18 +402,28 @@ int dpi_send_cmd(struct intel_dsi *intel_dsi, u32 cmd, bool hs)
 	else
 		cmd |= DPI_LP_MODE;
 
-	/* clear bit */
-	I915_WRITE(MIPI_INTR_STAT(pipe), SPL_PKT_SENT_INTERRUPT);
-
-	/* XXX: old code skips write if control unchanged */
-	if (cmd == I915_READ(MIPI_DPI_CONTROL(pipe)))
-		DRM_ERROR("Same special packet %02x twice in a row.\n", cmd);
-
-	I915_WRITE(MIPI_DPI_CONTROL(pipe), cmd);
-
-	mask = SPL_PKT_SENT_INTERRUPT;
-	if (wait_for((I915_READ(MIPI_INTR_STAT(pipe)) & mask) == mask, 100))
-		DRM_ERROR("Video mode command 0x%08x send failed.\n", cmd);
+	if (intel_dsi->dual_link)
+		count = 2;
+
+	do {
+		/* clear bit */
+		I915_WRITE(MIPI_INTR_STAT(pipe), SPL_PKT_SENT_INTERRUPT);
+
+		/* XXX: old code skips write if control unchanged */
+		if (cmd == I915_READ(MIPI_DPI_CONTROL(pipe)))
+			DRM_ERROR("Same special packet %02x twice in a row.\n",
+									cmd);
+		I915_WRITE(MIPI_DPI_CONTROL(pipe), cmd);
+
+		mask = SPL_PKT_SENT_INTERRUPT;
+		if (wait_for((I915_READ(MIPI_INTR_STAT(pipe)) & mask) ==
+								mask, 100))
+			DRM_ERROR("Video mode command 0x%08x send failed.\n",
+									cmd);
+		/* For Port C for dual link */
+		if (intel_dsi->dual_link)
+			pipe = PIPE_B;
+	} while (--count > 0);
 
 	return 0;
 }
-- 
1.7.9.5