[U-Boot] [PATCH 1/6] video: mxsfb: fix mxsfb fbdev binding issues

Igor Opaniuk
2019-07-11T08:56:49Z

+ Oleksandr

On Wed, Jun 19, 2019 at 11:47 AM Igor Opaniuk <igor.opaniuk@gmail.com> wrote:
>
> From: Igor Opaniuk <igor.opaniuk@toradex.com>
>
> Add support for display and bits-per-pixel properties.
>
> Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
> ---
> drivers/video/mxsfb.c | 74 ++++++++++++++++++++++++++++++++++++-------
> 1 file changed, 62 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/video/mxsfb.c b/drivers/video/mxsfb.c
> index f02ba20138..6c9a7c05e8 100644
> --- a/drivers/video/mxsfb.c
> +++ b/drivers/video/mxsfb.c
> @@ -271,6 +271,42 @@ dealloc_fb:
> }
> #else /* ifndef CONFIG_DM_VIDEO */
>
> +static int mxs_of_get_timings(struct udevice *dev,
> + struct display_timing *timings,
> + u32 *bpp)
> +{
> + int ret = 0;
> + u32 display_phandle;
> + ofnode display_node;
> +
> + ret = ofnode_read_u32(dev_ofnode(dev), "display", &display_phandle);
> + if (ret) {
> + dev_err(dev, "required display property isn't provided\n");
> + return -EINVAL;
> + }
> +
> + display_node = ofnode_get_by_phandle(display_phandle);
> + if (!ofnode_valid(display_node)) {
> + dev_err(dev, "failed to find display subnode\n");
> + return -EINVAL;
> + }
> +
> + ret = ofnode_read_u32(display_node, "bits-per-pixel", bpp);
> + if (ret) {
> + dev_err(dev,
> + "required bits-per-pixel property isn't provided\n");
> + return -EINVAL;
> + }
> +
> + ret = ofnode_decode_display_timing(display_node, 0, timings);
> + if (ret) {
> + dev_err(dev, "failed to get any display timings\n");
> + return -EINVAL;
> + }
> +
> + return ret;
> +}
> +
> static int mxs_video_probe(struct udevice *dev)
> {
> struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
> @@ -278,18 +314,16 @@ static int mxs_video_probe(struct udevice *dev)
>
> struct ctfb_res_modes mode;
> struct display_timing timings;
> - int bpp = -1;
> + u32 bpp = 0;
> u32 fb_start, fb_end;
> int ret;
>
> debug("%s() plat: base 0x%lx, size 0x%x\n",
> __func__, plat->base, plat->size);
>
> - ret = ofnode_decode_display_timing(dev_ofnode(dev), 0, &timings);
> - if (ret) {
> - dev_err(dev, "failed to get any display timings\n");
> - return -EINVAL;
> - }
> + ret = mxs_of_get_timings(dev, &timings, &bpp);
> + if (ret)
> + return ret;
>
> mode.xres = timings.hactive.typ;
> mode.yres = timings.vactive.typ;
> @@ -301,13 +335,12 @@ static int mxs_video_probe(struct udevice *dev)
> mode.vsync_len = timings.vsync_len.typ;
> mode.pixclock = HZ2PS(timings.pixelclock.typ);
>
> - bpp = BITS_PP;
> -
> ret = mxs_probe_common(&mode, bpp, plat->base);
> if (ret)
> return ret;
>
> switch (bpp) {
> + case 32:
> case 24:
> case 18:
> uc_priv->bpix = VIDEO_BPP32;
> @@ -341,15 +374,32 @@ static int mxs_video_bind(struct udevice *dev)
> {
> struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
> struct display_timing timings;
> + u32 bpp = 0;
> + u32 bytes_pp = 0;
> int ret;
>
> - ret = ofnode_decode_display_timing(dev_ofnode(dev), 0, &timings);
> - if (ret) {
> - dev_err(dev, "failed to get any display timings\n");
> + ret = mxs_of_get_timings(dev, &timings, &bpp);
> + if (ret)
> + return ret;
> +
> + switch (bpp) {
> + case 32:
> + case 24:
> + case 18:
> + bytes_pp = 4;
> + break;
> + case 16:
> + bytes_pp = 2;
> + break;
> + case 8:
> + bytes_pp = 1;
> + break;
> + default:
> + dev_err(dev, "invalid bpp specified (bpp = %i)\n", bpp);
> return -EINVAL;
> }
>
> - plat->size = timings.hactive.typ * timings.vactive.typ * BYTES_PP;
> + plat->size = timings.hactive.typ * timings.vactive.typ * bytes_pp;
>
> return 0;
> }
> --
> 2.17.1
>

--
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Igor Opaniuk

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skype: igor.opanyuk
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