From: "Guido Günther" <agx@sigxcpu.org>
To: Marek Vasut <marex@denx.de>, Stefan Agner <stefan@agner.ch>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
Shawn Guo <shawnguo@kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Fabio Estevam <festevam@gmail.com>,
NXP Linux Team <linux-imx@nxp.com>,
Sam Ravnborg <sam@ravnborg.org>,
Lucas Stach <l.stach@pengutronix.de>,
dri-devel@lists.freedesktop.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH] drm: mxsfb: Set proper default bus format when using a bridge
Date: Tue, 28 Sep 2021 10:55:35 +0200 [thread overview]
Message-ID: <YVLYh/SgBritG/RJ@qwark.sigxcpu.org> (raw)
If a bridge doesn't do any bus format handling MEDIA_BUS_FMT_FIXED is
returned. Fallback to a reasonable default (MEDIA_BUS_FMT_RGB888_1X24) in
that case.
This unbreaks e.g. using mxsfb with the nwl bridge and mipi panels.
Fixes: b776b0f00f24 ("drm: mxsfb: Use bus_format from the nearest bridge if present")
Signed-off-by: Guido Günther <agx@sigxcpu.org>
---
I'll look at what needs to be done in nwl separately but this also
unbreaks other bridge seupts that don't to format negotiation yet.
drivers/gpu/drm/mxsfb/mxsfb_kms.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/mxsfb/mxsfb_kms.c b/drivers/gpu/drm/mxsfb/mxsfb_kms.c
index af6c620adf6e..4ef94cf686b0 100644
--- a/drivers/gpu/drm/mxsfb/mxsfb_kms.c
+++ b/drivers/gpu/drm/mxsfb/mxsfb_kms.c
@@ -369,6 +369,8 @@ static void mxsfb_crtc_atomic_enable(struct drm_crtc *crtc,
drm_atomic_get_new_bridge_state(state,
mxsfb->bridge);
bus_format = bridge_state->input_bus_cfg.format;
+ if (bus_format == MEDIA_BUS_FMT_FIXED)
+ bus_format = MEDIA_BUS_FMT_RGB888_1X24;
}
/* If there is no bridge, use bus format from connector */
--
2.33.0
next reply other threads:[~2021-09-28 9:02 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-28 8:55 Guido Günther [this message]
2021-09-28 9:08 ` [PATCH] drm: mxsfb: Set proper default bus format when using a bridge Marek Vasut
2021-09-28 9:19 ` Guido Günther
2021-09-28 9:22 ` Marek Vasut
2021-09-28 9:27 ` Lucas Stach
2021-09-28 10:11 ` Marek Vasut
2021-09-28 12:20 ` Guido Günther
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