From 5df7bd130818dfdc9047c2a81b19737d66e55f9a Mon Sep 17 00:00:00 2001 From: José Roberto de Souza Date: Thu, 8 Apr 2021 13:31:50 -0700 Subject: drm/i915: skip display initialization when there is no display MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Display features should not be initialized or de-initialized when there is no display. Skip modeset initialization, output setup, plane, crtc, encoder, connector registration, display cdclk and rawclk initialization, display core initialization, etc. Skip the functionality at as high level as possible, and remove any redundant checks. If the functionality is conditional to *other* display checks, do not add more. If the un-initialization has checks for initialization, do not add more. We explicitly do not care about any GMCH/VLV/CHV code paths, as they've always had and will have display. Reviewed-by: Radhakrishna Sripada Cc: Lucas De Marchi Signed-off-by: José Roberto de Souza Signed-off-by: Jani Nikula Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20210408203150.237947-3-jose.souza@intel.com --- drivers/gpu/drm/i915/display/intel_hotplug.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'drivers/gpu/drm/i915/display/intel_hotplug.c') diff --git a/drivers/gpu/drm/i915/display/intel_hotplug.c b/drivers/gpu/drm/i915/display/intel_hotplug.c index f46a1b7190b8..47c85ac97c87 100644 --- a/drivers/gpu/drm/i915/display/intel_hotplug.c +++ b/drivers/gpu/drm/i915/display/intel_hotplug.c @@ -595,6 +595,9 @@ void intel_hpd_init(struct drm_i915_private *dev_priv) { int i; + if (!HAS_DISPLAY(dev_priv)) + return; + for_each_hpd_pin(i) { dev_priv->hotplug.stats[i].count = 0; dev_priv->hotplug.stats[i].state = HPD_ENABLED; @@ -670,6 +673,9 @@ static void i915_hpd_poll_init_work(struct work_struct *work) */ void intel_hpd_poll_enable(struct drm_i915_private *dev_priv) { + if (!HAS_DISPLAY(dev_priv)) + return; + WRITE_ONCE(dev_priv->hotplug.poll_enabled, true); /* @@ -702,6 +708,9 @@ void intel_hpd_poll_enable(struct drm_i915_private *dev_priv) */ void intel_hpd_poll_disable(struct drm_i915_private *dev_priv) { + if (!HAS_DISPLAY(dev_priv)) + return; + WRITE_ONCE(dev_priv->hotplug.poll_enabled, false); schedule_work(&dev_priv->hotplug.poll_init_work); } @@ -718,6 +727,9 @@ void intel_hpd_init_work(struct drm_i915_private *dev_priv) void intel_hpd_cancel_work(struct drm_i915_private *dev_priv) { + if (!HAS_DISPLAY(dev_priv)) + return; + spin_lock_irq(&dev_priv->irq_lock); dev_priv->hotplug.long_port_mask = 0; -- cgit