[Intel-gfx] [PATCH 14/89] drm/i915/skl: Don't try to read out the PCH transcoder state if not present

[Damien Lespiau]

When the platform doesn't have a FDI link, don't try to read out the
state of a potential PCH transcoder.

Signed-off-by: Damien Lespiau <damien.lespiau at intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h      | 2 ++
 drivers/gpu/drm/i915/intel_display.c | 3 ++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 4cc028a..cf4fc86 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2175,6 +2175,8 @@ struct drm_i915_cmd_table {
 #define HAS_PSR(dev)		(IS_HASWELL(dev) || IS_BROADWELL(dev))
 #define HAS_RUNTIME_PM(dev)	(IS_GEN6(dev) || IS_HASWELL(dev) || \
 				 IS_BROADWELL(dev) || IS_VALLEYVIEW(dev))
+#define HAS_FDI(dev)		(HAS_PCH_SPLIT(dev) && \
+				 INTEL_INFO(dev)->gen < 9)
 
 #define INTEL_PCH_DEVICE_ID_MASK		0xff00
 #define INTEL_PCH_IBX_DEVICE_ID_TYPE		0x3b00
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index fbc4b2f..6ad8098 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -7825,7 +7825,8 @@ static void haswell_get_ddi_port_state(struct intel_crtc *crtc,
 	 * DDI E. So just check whether this pipe is wired to DDI E and whether
 	 * the PCH transcoder is on.
 	 */
-	if ((port == PORT_E) && I915_READ(LPT_TRANSCONF) & TRANS_ENABLE) {
+	if (HAS_FDI(dev) &&
+	    (port == PORT_E) && I915_READ(LPT_TRANSCONF) & TRANS_ENABLE) {
 		pipe_config->has_pch_encoder = true;
 
 		tmp = I915_READ(FDI_RX_CTL(PIPE_A));
-- 
1.8.3.1