drm/msm/dpu: add HDMI output support

MSM8998 and the older Qualcomm platforms support HDMI outputs. Now as
DPU encoder is ready, add support for using INTF_HDMI.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Arnaud Vrac <rawoul@gmail.com>
Tested-by: Arnaud Vrac <rawoul@gmail.com> # on msm8998
Patchwork: https://patchwork.freedesktop.org/patch/532371/
Link: https://lore.kernel.org/r/20230415171926.85774-3-dmitry.baryshkov@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index e85e372..717a44f 100644 (file)
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -617,6 +617,44 @@ static int _dpu_kms_initialize_displayport(struct drm_device *dev,
        return 0;
 }
 
+static int _dpu_kms_initialize_hdmi(struct drm_device *dev,
+                                   struct msm_drm_private *priv,
+                                   struct dpu_kms *dpu_kms)
+{
+       struct drm_encoder *encoder = NULL;
+       struct msm_display_info info;
+       int rc;
+
+       if (!priv->hdmi)
+               return 0;
+
+       encoder = dpu_encoder_init(dev, DRM_MODE_ENCODER_TMDS);
+       if (IS_ERR(encoder)) {
+               DPU_ERROR("encoder init failed for HDMI display\n");
+               return PTR_ERR(encoder);
+       }
+
+       memset(&info, 0, sizeof(info));
+       rc = msm_hdmi_modeset_init(priv->hdmi, dev, encoder);
+       if (rc) {
+               DPU_ERROR("modeset_init failed for DP, rc = %d\n", rc);
+               drm_encoder_cleanup(encoder);
+               return rc;
+       }
+
+       info.num_of_h_tiles = 1;
+       info.h_tile_instance[0] = 0;
+       info.intf_type = INTF_HDMI;
+       rc = dpu_encoder_setup(dev, encoder, &info);
+       if (rc) {
+               DPU_ERROR("failed to setup DPU encoder %d: rc:%d\n",
+                         encoder->base.id, rc);
+               return rc;
+       }
+
+       return 0;
+}
+
 static int _dpu_kms_initialize_writeback(struct drm_device *dev,
                struct msm_drm_private *priv, struct dpu_kms *dpu_kms,
                const u32 *wb_formats, int n_formats)
@@ -683,6 +721,12 @@ static int _dpu_kms_setup_displays(struct drm_device *dev,
                return rc;
        }
 
+       rc = _dpu_kms_initialize_hdmi(dev, priv, dpu_kms);
+       if (rc) {
+               DPU_ERROR("initialize HDMI failed, rc = %d\n", rc);
+               return rc;
+       }
+
        /* Since WB isn't a driver check the catalog before initializing */
        if (dpu_kms->catalog->wb_count) {
                for (i = 0; i < dpu_kms->catalog->wb_count; i++) {