[U-Boot] [PATCH v3 3/6] video: fsl_dcu_fb: Enable pixel clock after initialization

[Alison Wang]

> -----Original Message-----
> From: Sanchayan Maity [mailto:maitysanchayan at gmail.com]
> Sent: Tuesday, April 11, 2017 1:42 PM
> To: u-boot at lists.denx.de; sbabic at denx.de; agust at denx.de
> Cc: albert.u.boot at aribaud.net; Feng Li <feng.li_2 at nxp.com>;
> alison.wang at freescale.com; Sumit Garg <sumit.garg at nxp.com>; Stefan
> Agner <stefan.agner at toradex.com>; york sun <york.sun at nxp.com>; Z.Q. Hou
> <zhiqiang.hou at nxp.com>; Xiaoliang Yang <xiaoliang.yang at nxp.com>;
> Sanchayan Maity <maitysanchayan at gmail.com>
> Subject: [PATCH v3 3/6] video: fsl_dcu_fb: Enable pixel clock after
> initialization
> 
> From: Stefan Agner <stefan.agner at toradex.com>
> 
> When enabling the DCU and pixel clock, the test mode is activated since
> this is the reset configuration. The test mode immediately shows a red
> screen on a LCD. A moment later, the DCU gets initialized properly.
> 
> This patch enables the pixel clock after initialization of the DCU
> control register. This avoids this initial flicker on LCD screens.
> 
> While at it change the polarity of pixel clock to display samples data
> on the rising edge.
> 
> Signed-off-by: Stefan Agner <stefan.agner at toradex.com>
> Signed-off-by: Sanchayan Maity <maitysanchayan at gmail.com>
> ---
>  drivers/video/fsl_dcu_fb.c | 13 ++++++-------
>  1 file changed, 6 insertions(+), 7 deletions(-)
> 
Reviewed-by: Alison Wang <alison.wang at nxp.com>


Best Regards,
Alison Wang