[PATCH v3] drm: imx: imx-tve: Check and propagate the errors

[Fabio Estevam]

From: Fabio Estevam <fabio.este...@freescale.com>

In the case of errors we should propagate them.

Signed-off-by: Fabio Estevam <fabio.estevam at freescale.com>
---
Changes since v2:
- Propage the error in more places like suggested by Philipp

 drivers/gpu/drm/imx/imx-tve.c | 24 ++++++++++++++++--------
 1 file changed, 16 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/imx/imx-tve.c b/drivers/gpu/drm/imx/imx-tve.c
index a729f4f7..9bb8f66 100644
--- a/drivers/gpu/drm/imx/imx-tve.c
+++ b/drivers/gpu/drm/imx/imx-tve.c
@@ -191,10 +191,18 @@ static int tve_setup_vga(struct imx_tve *tve)
        /* set gain to (1 + 10/128) to provide 0.7V peak-to-peak amplitude */
        ret = regmap_update_bits(tve->regmap, TVE_TVDAC0_CONT_REG,
                                 TVE_TVDAC_GAIN_MASK, 0x0a);
+       if (ret)
+               return ret;
+
        ret = regmap_update_bits(tve->regmap, TVE_TVDAC1_CONT_REG,
                                 TVE_TVDAC_GAIN_MASK, 0x0a);
+       if (ret)
+               return ret;
+
        ret = regmap_update_bits(tve->regmap, TVE_TVDAC2_CONT_REG,
                                 TVE_TVDAC_GAIN_MASK, 0x0a);
+       if (ret)
+               return ret;

        /* set configuration register */
        mask = TVE_DATA_SOURCE_MASK | TVE_INP_VIDEO_FORM;
@@ -204,16 +212,12 @@ static int tve_setup_vga(struct imx_tve *tve)
        mask |= TVE_TV_OUT_MODE_MASK | TVE_SYNC_CH_0_EN;
        val  |= TVE_TV_OUT_RGB       | TVE_SYNC_CH_0_EN;
        ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG, mask, val);
-       if (ret < 0) {
-               dev_err(tve->dev, "failed to set configuration: %d\n", ret);
+       if (ret)
                return ret;
-       }

        /* set test mode (as documented) */
-       ret = regmap_update_bits(tve->regmap, TVE_TST_MODE_REG,
+       return regmap_update_bits(tve->regmap, TVE_TST_MODE_REG,
                                 TVE_TVDAC_TEST_MODE_MASK, 1);
-
-       return 0;
 }

 static enum drm_connector_status imx_tve_connector_detect(
@@ -335,9 +339,11 @@ static void imx_tve_encoder_mode_set(struct drm_encoder 
*encoder,
        }

        if (tve->mode == TVE_MODE_VGA)
-               tve_setup_vga(tve);
+               ret = tve_setup_vga(tve);
        else
-               tve_setup_tvout(tve);
+               ret = tve_setup_tvout(tve);
+       if (ret)
+               dev_err(tve->dev, "failed to set configuration: %d\n", ret);
 }

 static void imx_tve_encoder_commit(struct drm_encoder *encoder)
@@ -671,6 +677,8 @@ static int imx_tve_bind(struct device *dev, struct device 
*master, void *data)

        /* disable cable detection for VGA mode */
        ret = regmap_write(tve->regmap, TVE_CD_CONT_REG, 0);
+       if (ret)
+               return ret;

        ret = imx_tve_register(drm, tve);
        if (ret)
-- 
1.9.1