# Re: \[PATCH v2 0/7\] imx-drm: ipuv3-crtc: Implement mode\_fixup

- From: Fabio Estevam \<festevam@gmail.com\>
- Date: 2015-01-23 15:07:01 
- List: linux-fbdev
- Page: https://ratatoskr.run/linux-fbdev/2015/01/4416199
- Thread: https://ratatoskr.run/linux-fbdev/2014/12/4397628/t.md

```text
On Fri, Jan 23, 2015 at 12:56 AM, Liu Ying [ref] wrote:
> Hi,
>
> It looks that the below commit makes my Hannstar XGA LVDS panel stop working
> on the i.MX6DL SabreSD board.  Any idea?

Yes, with eb10d6355532def3a ("mx-drm: encoder prepare/mode_set must
use adjusted mode") applied
the DI clock is 0:

--- a/drivers/gpu/drm/imx/imx-ldb.c
+++ b/drivers/gpu/drm/imx/imx-ldb.c
@@ -169,6 +169,8 @@ static void imx_ldb_encoder_prepare(struct
drm_encoder *encoder)
        unsigned long di_clk = mode->clock * 1000;
        int mux = imx_drm_encoder_get_mux_id(imx_ldb_ch->child, encoder);

+       pr_err("********* DI clock is %ld\n", di_clk);
+
        if (ldb->ldb_ctrl & LDB_SPLIT_MODE_EN) {

With eb10d6355532def3a applied:

[    1.493745] ********* DI clock is 0

With eb10d6355532def3a reverted:

[    1.493639] ********* DI clock is 65000000

Should we just go back to the previous usage?

--- a/drivers/gpu/drm/imx/imx-ldb.c
+++ b/drivers/gpu/drm/imx/imx-ldb.c
@@ -163,12 +163,14 @@ static void imx_ldb_encoder_prepare(struct
drm_encoder *encoder)
 {
        struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder);
        struct imx_ldb *ldb = imx_ldb_ch->ldb;
-       struct drm_display_mode *mode = &encoder->crtc->hwmode;
+       struct drm_display_mode *mode = &encoder->crtc->mode;
        u32 pixel_fmt;
```