drm/i915/sdvo: Precompute HDMI infoframes

As with regular HDMI encoders, let's precompute the infoframes
(actually just AVI infoframe for the time being) with SDVO HDMI
encoders.

v2: Drop the WARN_ON() from drm_hdmi_avi_infoframe_from_display_mode()
    return since that could genuinely fail due to user asking
    for incompatible aspect ratio
v3: .compute_config() now returns int

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20190225174106.2163-7-ville.syrjala@linux.intel.com

diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
index e7b0884..0055136 100644 (file)
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -978,34 +978,57 @@ static bool intel_sdvo_write_infoframe(struct intel_sdvo *intel_sdvo,
                                    &tx_rate, 1);
 }
 
-static bool intel_sdvo_set_avi_infoframe(struct intel_sdvo *intel_sdvo,
-                                        const struct intel_crtc_state *pipe_config,
-                                        const struct drm_connector_state *conn_state)
+static bool intel_sdvo_compute_avi_infoframe(struct intel_sdvo *intel_sdvo,
+                                            struct intel_crtc_state *crtc_state,
+                                            struct drm_connector_state *conn_state)
 {
+       struct hdmi_avi_infoframe *frame = &crtc_state->infoframes.avi.avi;
        const struct drm_display_mode *adjusted_mode =
-               &pipe_config->base.adjusted_mode;
-       u8 sdvo_data[HDMI_INFOFRAME_SIZE(AVI)];
-       union hdmi_infoframe frame;
+               &crtc_state->base.adjusted_mode;
        int ret;
-       ssize_t len;
 
-       ret = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi,
+       if (!crtc_state->has_hdmi_sink)
+               return true;
+
+       crtc_state->infoframes.enable |=
+               intel_hdmi_infoframe_enable(HDMI_INFOFRAME_TYPE_AVI);
+
+       ret = drm_hdmi_avi_infoframe_from_display_mode(frame,
                                                       conn_state->connector,
                                                       adjusted_mode);
-       if (ret < 0) {
-               DRM_ERROR("couldn't fill AVI infoframe\n");
+       if (ret)
                return false;
-       }
 
-       drm_hdmi_avi_infoframe_quant_range(&frame.avi,
+       drm_hdmi_avi_infoframe_quant_range(frame,
                                           conn_state->connector,
                                           adjusted_mode,
-                                          pipe_config->limited_color_range ?
+                                          crtc_state->limited_color_range ?
                                           HDMI_QUANTIZATION_RANGE_LIMITED :
                                           HDMI_QUANTIZATION_RANGE_FULL);
 
-       len = hdmi_infoframe_pack(&frame, sdvo_data, sizeof(sdvo_data));
-       if (len < 0)
+       ret = hdmi_avi_infoframe_check(frame);
+       if (WARN_ON(ret))
+               return false;
+
+       return true;
+}
+
+static bool intel_sdvo_set_avi_infoframe(struct intel_sdvo *intel_sdvo,
+                                        const struct intel_crtc_state *crtc_state)
+{
+       u8 sdvo_data[HDMI_INFOFRAME_SIZE(AVI)];
+       const union hdmi_infoframe *frame = &crtc_state->infoframes.avi;
+       ssize_t len;
+
+       if ((crtc_state->infoframes.enable &
+            intel_hdmi_infoframe_enable(HDMI_INFOFRAME_TYPE_AVI)) == 0)
+               return true;
+
+       if (WARN_ON(frame->any.type != HDMI_INFOFRAME_TYPE_AVI))
+               return false;
+
+       len = hdmi_infoframe_pack_only(frame, sdvo_data, sizeof(sdvo_data));
+       if (WARN_ON(len < 0))
                return false;
 
        return intel_sdvo_write_infoframe(intel_sdvo, SDVO_HBUF_INDEX_AVI_IF,
@@ -1193,6 +1216,12 @@ static int intel_sdvo_compute_config(struct intel_encoder *encoder,
        if (intel_sdvo_connector->is_hdmi)
                adjusted_mode->picture_aspect_ratio = conn_state->picture_aspect_ratio;
 
+       if (!intel_sdvo_compute_avi_infoframe(intel_sdvo,
+                                             pipe_config, conn_state)) {
+               DRM_DEBUG_KMS("bad AVI infoframe\n");
+               return -EINVAL;
+       }
+
        return 0;
 }
 
@@ -1315,8 +1344,7 @@ static void intel_sdvo_pre_enable(struct intel_encoder *intel_encoder,
                intel_sdvo_set_encode(intel_sdvo, SDVO_ENCODE_HDMI);
                intel_sdvo_set_colorimetry(intel_sdvo,
                                           SDVO_COLORIMETRY_RGB256);
-               intel_sdvo_set_avi_infoframe(intel_sdvo,
-                                            crtc_state, conn_state);
+               intel_sdvo_set_avi_infoframe(intel_sdvo, crtc_state);
        } else
                intel_sdvo_set_encode(intel_sdvo, SDVO_ENCODE_DVI);