[21/29] drm/i915: Complain if hsw_get_pipe_config acquires the same power well twice

Submitted by Chris Wilson on Dec. 6, 2018, 9:15 p.m.

Details

Message ID 20181206211532.31217-21-chris@chris-wilson.co.uk
State New
Series "Series without cover letter"
Headers show

Commit Message

Chris Wilson Dec. 6, 2018, 9:15 p.m.
As we only release each power well once, we assume that each transcoder
maps to a different domain. Complain if this is not so.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/intel_display.c | 6 ++++++
 1 file changed, 6 insertions(+)

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diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 9e616b13980e..ba07c5ae67c0 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9550,6 +9550,8 @@  static bool hsw_get_transcoder_state(struct intel_crtc *crtc,
 	power_domain = POWER_DOMAIN_TRANSCODER(pipe_config->cpu_transcoder);
 	if (!intel_display_power_get_if_enabled(dev_priv, power_domain))
 		return false;
+
+	WARN_ON(*power_domain_mask & BIT_ULL(power_domain));
 	*power_domain_mask |= BIT_ULL(power_domain);
 
 	tmp = I915_READ(PIPECONF(pipe_config->cpu_transcoder));
@@ -9577,6 +9579,8 @@  static bool bxt_get_dsi_transcoder_state(struct intel_crtc *crtc,
 		power_domain = POWER_DOMAIN_TRANSCODER(cpu_transcoder);
 		if (!intel_display_power_get_if_enabled(dev_priv, power_domain))
 			continue;
+
+		WARN_ON(*power_domain_mask & BIT_ULL(power_domain));
 		*power_domain_mask |= BIT_ULL(power_domain);
 
 		/*
@@ -9693,7 +9697,9 @@  static bool haswell_get_pipe_config(struct intel_crtc *crtc,
 
 	power_domain = POWER_DOMAIN_PIPE_PANEL_FITTER(crtc->pipe);
 	if (intel_display_power_get_if_enabled(dev_priv, power_domain)) {
+		WARN_ON(power_domain_mask & BIT_ULL(power_domain));
 		power_domain_mask |= BIT_ULL(power_domain);
+
 		if (INTEL_GEN(dev_priv) >= 9)
 			skylake_get_pfit_config(crtc, pipe_config);
 		else