drm/fsl-dcu: enable TCON bypass mode by default

Do not use encoder disable/enable callbacks to control bypass
mode as this seems to mess with the signals not liked by
displays. This also makes more sense since the encoder is
already defined to be parallel RGB/LVDS at creation time.

Signed-off-by: Stefan Agner <stefan@agner.ch>
Tested-By: Meng Yi <meng.yi@nxp.com>

diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
index 0884c45aefe84a9800b2ec95c57d0f44d1259835..3897f5671776e418bc87b1d19f0a1d6843695042 100644 (file)
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
@@ -273,6 +273,8 @@ static int fsl_dcu_drm_pm_resume(struct device *dev)
                goto disable_dcu_clk;
        }
 
+       if (fsl_dev->tcon)
+               fsl_tcon_bypass_enable(fsl_dev->tcon);
        fsl_dcu_drm_init_planes(fsl_dev->drm);
        drm_atomic_helper_resume(fsl_dev->drm, fsl_dev->state);
 

diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c
index 26edcc899712d16db8959cbb2a5b01c932431c0b..e1dd75b181189bbc27f81eb92ad3f308b735aa2e 100644 (file)
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c
@@ -20,38 +20,6 @@
 #include "fsl_dcu_drm_drv.h"
 #include "fsl_tcon.h"
 
-static int
-fsl_dcu_drm_encoder_atomic_check(struct drm_encoder *encoder,
-                                struct drm_crtc_state *crtc_state,
-                                struct drm_connector_state *conn_state)
-{
-       return 0;
-}
-
-static void fsl_dcu_drm_encoder_disable(struct drm_encoder *encoder)
-{
-       struct drm_device *dev = encoder->dev;
-       struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
-
-       if (fsl_dev->tcon)
-               fsl_tcon_bypass_disable(fsl_dev->tcon);
-}
-
-static void fsl_dcu_drm_encoder_enable(struct drm_encoder *encoder)
-{
-       struct drm_device *dev = encoder->dev;
-       struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
-
-       if (fsl_dev->tcon)
-               fsl_tcon_bypass_enable(fsl_dev->tcon);
-}
-
-static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
-       .atomic_check = fsl_dcu_drm_encoder_atomic_check,
-       .disable = fsl_dcu_drm_encoder_disable,
-       .enable = fsl_dcu_drm_encoder_enable,
-};
-
 static void fsl_dcu_drm_encoder_destroy(struct drm_encoder *encoder)
 {
        drm_encoder_cleanup(encoder);
@@ -68,13 +36,16 @@ int fsl_dcu_drm_encoder_create(struct fsl_dcu_drm_device *fsl_dev,
        int ret;
 
        encoder->possible_crtcs = 1;
+
+       /* Use bypass mode for parallel RGB/LVDS encoder */
+       if (fsl_dev->tcon)
+               fsl_tcon_bypass_enable(fsl_dev->tcon);
+
        ret = drm_encoder_init(fsl_dev->drm, encoder, &encoder_funcs,
                               DRM_MODE_ENCODER_LVDS, NULL);
        if (ret < 0)
                return ret;
 
-       drm_encoder_helper_add(encoder, &encoder_helper_funcs);
-
        return 0;
 }