Merge tag 'v4.8-rc8' into drm-next

Linux 4.8-rc8

There was a lot of fallout in the imx/amdgpu/i915 drivers, so backmerge
it now to avoid troubles.

* tag 'v4.8-rc8': (1442 commits)
  Linux 4.8-rc8
  fault_in_multipages_readable() throws set-but-unused error
  mm: check VMA flags to avoid invalid PROT_NONE NUMA balancing
  radix tree: fix sibling entry handling in radix_tree_descend()
  radix tree test suite: Test radix_tree_replace_slot() for multiorder entries
  fix memory leaks in tracing_buffers_splice_read()
  tracing: Move mutex to protect against resetting of seq data
  MIPS: Fix delay slot emulation count in debugfs
  MIPS: SMP: Fix possibility of deadlock when bringing CPUs online
  mm: delete unnecessary and unsafe init_tlb_ubc()
  huge tmpfs: fix Committed_AS leak
  shmem: fix tmpfs to handle the huge= option properly
  blk-mq: skip unmapped queues in blk_mq_alloc_request_hctx
  MIPS: Fix pre-r6 emulation FPU initialisation
  arm64: kgdb: handle read-only text / modules
  arm64: Call numa_store_cpu_info() earlier.
  locking/hung_task: Fix typo in CONFIG_DETECT_HUNG_TASK help text
  nvme-rdma: only clear queue flags after successful connect
  i2c: qup: skip qup_i2c_suspend if the device is already runtime suspended
  perf/core: Limit matching exclusive events to one PMU
  ...

1 files changed, 36 insertions, 7 deletions

diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c
index 3d228ad90e0f..3dea1216bafd 100644
--- a/drivers/gpu/drm/tegra/dsi.c
+++ b/drivers/gpu/drm/tegra/dsi.c
@@ -840,6 +840,21 @@ static const struct drm_encoder_funcs tegra_dsi_encoder_funcs = {
 	.destroy = tegra_output_encoder_destroy,
 };
 
+static void tegra_dsi_unprepare(struct tegra_dsi *dsi)
+{
+	int err;
+
+	if (dsi->slave)
+		tegra_dsi_unprepare(dsi->slave);
+
+	err = tegra_mipi_disable(dsi->mipi);
+	if (err < 0)
+		dev_err(dsi->dev, "failed to disable MIPI calibration: %d\n",
+			err);
+
+	pm_runtime_put(dsi->dev);
+}
+
 static void tegra_dsi_encoder_disable(struct drm_encoder *encoder)
 {
 	struct tegra_output *output = encoder_to_output(encoder);
@@ -876,7 +891,26 @@ static void tegra_dsi_encoder_disable(struct drm_encoder *encoder)
 
 	tegra_dsi_disable(dsi);
 
-	pm_runtime_put(dsi->dev);
+	tegra_dsi_unprepare(dsi);
+}
+
+static void tegra_dsi_prepare(struct tegra_dsi *dsi)
+{
+	int err;
+
+	pm_runtime_get_sync(dsi->dev);
+
+	err = tegra_mipi_enable(dsi->mipi);
+	if (err < 0)
+		dev_err(dsi->dev, "failed to enable MIPI calibration: %d\n",
+			err);
+
+	err = tegra_dsi_pad_calibrate(dsi);
+	if (err < 0)
+		dev_err(dsi->dev, "MIPI calibration failed: %d\n", err);
+
+	if (dsi->slave)
+		tegra_dsi_prepare(dsi->slave);
 }
 
 static void tegra_dsi_encoder_enable(struct drm_encoder *encoder)
@@ -887,13 +921,8 @@ static void tegra_dsi_encoder_enable(struct drm_encoder *encoder)
 	struct tegra_dsi *dsi = to_dsi(output);
 	struct tegra_dsi_state *state;
 	u32 value;
-	int err;
-
-	pm_runtime_get_sync(dsi->dev);
 
-	err = tegra_dsi_pad_calibrate(dsi);
-	if (err < 0)
-		dev_err(dsi->dev, "MIPI calibration failed: %d\n", err);
+	tegra_dsi_prepare(dsi);
 
 	state = tegra_dsi_get_state(dsi);