drm/i915: Handle adjust better in intel_pipe_config_compare

Some parameters use CHECK_BOOL, but should really use
CHECK_BOOL_INCOMPLETE. We cannot currently check whether
the inherited infoframes and audio are set up correctly.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171110113503.16253-4-maarten.lankhorst@linux.intel.com
[mlankhorst: Add danvet's comment about why this is needed.]
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index f56e7d2..0ebf3f2 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -11073,6 +11073,9 @@ intel_pipe_config_compare(struct drm_i915_private *dev_priv,
                          bool adjust)
 {
        bool ret = true;
+       bool fixup_inherited = adjust &&
+               (current_config->base.mode.private_flags & I915_MODE_FLAG_INHERITED) &&
+               !(pipe_config->base.mode.private_flags & I915_MODE_FLAG_INHERITED);
 
 #define PIPE_CONF_CHECK_X(name)        \
        if (current_config->name != pipe_config->name) { \
@@ -11101,6 +11104,22 @@ intel_pipe_config_compare(struct drm_i915_private *dev_priv,
                ret = false; \
        }
 
+/*
+ * Checks state where we only read out the enabling, but not the entire
+ * state itself (like full infoframes or ELD for audio). These states
+ * require a full modeset on bootup to fix up.
+ */
+#define PIPE_CONF_CHECK_BOOL_INCOMPLETE(name) \
+       if (!fixup_inherited || (!current_config->name && !pipe_config->name)) { \
+               PIPE_CONF_CHECK_BOOL(name); \
+       } else { \
+               pipe_config_err(adjust, __stringify(name), \
+                         "unable to verify whether state matches exactly, forcing modeset (expected %s, found %s)\n", \
+                         yesno(current_config->name), \
+                         yesno(pipe_config->name)); \
+               ret = false; \
+       }
+
 #define PIPE_CONF_CHECK_P(name)        \
        if (current_config->name != pipe_config->name) { \
                pipe_config_err(adjust, __stringify(name), \
@@ -11225,10 +11244,10 @@ intel_pipe_config_compare(struct drm_i915_private *dev_priv,
 
        PIPE_CONF_CHECK_BOOL(hdmi_scrambling);
        PIPE_CONF_CHECK_BOOL(hdmi_high_tmds_clock_ratio);
-       PIPE_CONF_CHECK_BOOL(has_infoframe);
+       PIPE_CONF_CHECK_BOOL_INCOMPLETE(has_infoframe);
        PIPE_CONF_CHECK_BOOL(ycbcr420);
 
-       PIPE_CONF_CHECK_BOOL(has_audio);
+       PIPE_CONF_CHECK_BOOL_INCOMPLETE(has_audio);
 
        PIPE_CONF_CHECK_FLAGS(base.adjusted_mode.flags,
                              DRM_MODE_FLAG_INTERLACE);
@@ -11303,6 +11322,7 @@ intel_pipe_config_compare(struct drm_i915_private *dev_priv,
 #undef PIPE_CONF_CHECK_X
 #undef PIPE_CONF_CHECK_I
 #undef PIPE_CONF_CHECK_BOOL
+#undef PIPE_CONF_CHECK_BOOL_INCOMPLETE
 #undef PIPE_CONF_CHECK_P
 #undef PIPE_CONF_CHECK_FLAGS
 #undef PIPE_CONF_CHECK_CLOCK_FUZZY