[Intel-gfx] [PATCH v3 10/15] drm/i915/rkl: Don't try to read out DSI transcoders

[Matt Roper]

From: Aditya Swarup <aditya.swarup at intel.com>

RKL doesn't have DSI outputs, so we shouldn't try to read out the DSI
transcoder registers.

v2(MattR):
 - Just set the 'extra panel mask' to edp | dsi0 | dsi1 and then mask
   against the platform's cpu_transcoder_mask to filter out the ones
   that don't exist on a given platform.  (Ville)

Signed-off-by: Aditya Swarup <aditya.swarup at intel.com>
Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 019fef8023ca..bcc6dc4e321b 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -10904,19 +10904,13 @@ static bool hsw_get_transcoder_state(struct intel_crtc *crtc,
 	struct drm_device *dev = crtc->base.dev;
 	struct drm_i915_private *dev_priv = to_i915(dev);
 	enum intel_display_power_domain power_domain;
-	unsigned long panel_transcoder_mask = 0;
+	unsigned long panel_transcoder_mask = BIT(TRANSCODER_EDP) |
+		BIT(TRANSCODER_DSI_0) | BIT(TRANSCODER_DSI_1);
 	unsigned long enabled_panel_transcoders = 0;
 	enum transcoder panel_transcoder;
 	intel_wakeref_t wf;
 	u32 tmp;
 
-	if (INTEL_GEN(dev_priv) >= 11)
-		panel_transcoder_mask |=
-			BIT(TRANSCODER_DSI_0) | BIT(TRANSCODER_DSI_1);
-
-	if (HAS_TRANSCODER(dev_priv, TRANSCODER_EDP))
-		panel_transcoder_mask |= BIT(TRANSCODER_EDP);
-
 	/*
 	 * The pipe->transcoder mapping is fixed with the exception of the eDP
 	 * and DSI transcoders handled below.
@@ -10927,6 +10921,7 @@ static bool hsw_get_transcoder_state(struct intel_crtc *crtc,
 	 * XXX: Do intel_display_power_get_if_enabled before reading this (for
 	 * consistency and less surprising code; it's in always on power).
 	 */
+	panel_transcoder_mask &= INTEL_INFO(dev_priv)->cpu_transcoder_mask;
 	for_each_set_bit(panel_transcoder,
 			 &panel_transcoder_mask,
 			 ARRAY_SIZE(INTEL_INFO(dev_priv)->trans_offsets)) {
-- 
2.24.1