For dual link MIPI panels, SHUTDOWN packet needs to send to both Ports
A & C during MIPI encoder disabling sequence. Similarly, TURN ON packet
to be sent to both Ports during MIPI encoder enabling sequence.
v2: Address review comments by Jani
- Used a for loop instead of do-while loop.
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 | 34 +++++++++++++++++++++-------------
1 file changed, 21 insertions(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_dsi_cmd.c
b/drivers/gpu/drm/i915/intel_dsi_cmd.c
index 9cfa832..aecc27c 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);
int port = PIPE_MAPPED_TO_MIPI_PORT(intel_crtc->pipe);
u32 mask;
+ int count;
/* XXX: pipe, hs */
if (hs)
@@ -401,19 +402,26 @@ 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(port), SPL_PKT_SENT_INTERRUPT);
-
- /* XXX: old code skips write if control unchanged */
- if (cmd == I915_READ(MIPI_DPI_CONTROL(port)))
- DRM_ERROR("Same special packet %02x twice in a row.\n", cmd);
-
- I915_WRITE(MIPI_DPI_CONTROL(port), cmd);
-
- mask = SPL_PKT_SENT_INTERRUPT;
- if (wait_for((I915_READ(MIPI_INTR_STAT(port)) & mask) == mask, 100))
- DRM_ERROR("Video mode command 0x%08x send failed.\n", cmd);
-
+ for (count = 0; count < (intel_dsi->dual_link ? 2 : 1); count++) {
+ /* clear bit */
+ I915_WRITE(MIPI_INTR_STAT(port), SPL_PKT_SENT_INTERRUPT);
+
+ /* XXX: old code skips write if control unchanged */
+ if (cmd == I915_READ(MIPI_DPI_CONTROL(port)))
+ DRM_ERROR("Same special packet %02x twice in a row.\n",
+ cmd);
+
+ I915_WRITE(MIPI_DPI_CONTROL(port), cmd);
+
+ mask = SPL_PKT_SENT_INTERRUPT;
+ if (wait_for((I915_READ(MIPI_INTR_STAT(port)) & mask) ==
+ mask, 100))
+ DRM_ERROR("Video mode command 0x%08x send failed.\n",
+ cmd);
+ /* For dual link */
+ if (intel_dsi->dual_link)
+ port = PORT_B;
+ }
return 0;
}
--
1.7.9.5
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