[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.si...@intel.com>
Signed-off-by: Shobhit Kumar <shobhit.ku...@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

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