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video: tegra-dc: request timings from panel driver first

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Check if panel driver has display timings and get those.
If panel driver does not pass timing, try to find timing
under rgb node for backwards compatibility.

Tested-by: Robert Eckelmann <longnoserob@gmail.com> # ASUS TF101 T20
Tested-by: Nicolas Chauvet <kwizart@gmail.com> # Paz00
Tested-by: Andreas Westman Dorcsak <hedmoo@yahoo.com> # ASUS TF T30
Tested-by: Svyatoslav Ryhel <clamor95@gmail.com> # LG P895 T30
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
This commit is contained in:
Svyatoslav Ryhel 2023-03-27 11:11:43 +03:00 committed by Anatolij Gustschin
parent e114f507ec
commit f67f23c5df
1 changed files with 17 additions and 12 deletions
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29
drivers/video/tegra20/tegra-dc.c
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@ -380,18 +380,6 @@ static int tegra_lcd_of_to_plat(struct udevice *dev)
return -EINVAL;
}
ret = fdtdec_decode_display_timing(blob, rgb, 0, &priv->timing);
if (ret) {
debug("%s: Cannot read display timing for '%s' (ret=%d)\n",
__func__, dev->name, ret);
return -EINVAL;
}
timing = &priv->timing;
priv->width = timing->hactive.typ;
priv->height = timing->vactive.typ;
priv->pixel_clock = timing->pixelclock.typ;
priv->log2_bpp = VIDEO_BPP16;
/*
* Sadly the panel phandle is in an rgb subnode so we cannot use
* uclass_get_device_by_phandle().
@ -401,6 +389,7 @@ static int tegra_lcd_of_to_plat(struct udevice *dev)
debug("%s: Cannot find panel information\n", __func__);
return -EINVAL;
}
ret = uclass_get_device_by_of_offset(UCLASS_PANEL, panel_node,
&priv->panel);
if (ret) {
@ -409,6 +398,22 @@ static int tegra_lcd_of_to_plat(struct udevice *dev)
return ret;
}
ret = panel_get_display_timing(priv->panel, &priv->timing);
if (ret) {
ret = fdtdec_decode_display_timing(blob, rgb, 0, &priv->timing);
if (ret) {
debug("%s: Cannot read display timing for '%s' (ret=%d)\n",
__func__, dev->name, ret);
return -EINVAL;
}
}
timing = &priv->timing;
priv->width = timing->hactive.typ;
priv->height = timing->vactive.typ;
priv->pixel_clock = timing->pixelclock.typ;
priv->log2_bpp = VIDEO_BPP16;
return 0;
}