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drm/imx: parallel-display: Remove bus flags check in imx_pd_bridge_atomic_check()

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If display timings were read from the devicetree using
of_get_display_timing() and pixelclk-active is defined
there, the flag DISPLAY_FLAGS_SYNC_POSEDGE/NEGEDGE is
automatically generated. Through the function
drm_bus_flags_from_videomode() e.g. called in the
panel-simple driver this flag got into the bus flags,
but then in imx_pd_bridge_atomic_check() the bus flag
check failed and will not initialize the display. The
original commit fe141cedc4 does not explain why this
check was introduced. So remove the bus flags check,
because it stops the initialization of the display with
valid bus flags.

Fixes: fe141cedc4 ("drm/imx: pd: Use bus format/flags provided by the bridge when available")
Signed-off-by: Christoph Niedermaier <cniedermaier@dh-electronics.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Boris Brezillon <boris.brezillon@collabora.com>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: linux-arm-kernel@lists.infradead.org
To: dri-devel@lists.freedesktop.org
Tested-by: Max Krummenacher <max.krummenacher@toradex.com>
Acked-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Marek Vasut <marex@denx.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20220201113643.4638-1-cniedermaier@dh-electronics.com
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
This commit is contained in:
Christoph Niedermaier 2022-02-01 12:36:43 +01:00 committed by Maarten Lankhorst
parent 40ce1121c1
commit 6061806a86
1 changed files with 0 additions and 8 deletions
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8
drivers/gpu/drm/imx/parallel-display.c
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@ -217,14 +217,6 @@ static int imx_pd_bridge_atomic_check(struct drm_bridge *bridge,
if (!imx_pd_format_supported(bus_fmt))
return -EINVAL;
if (bus_flags &
~(DRM_BUS_FLAG_DE_LOW | DRM_BUS_FLAG_DE_HIGH |
DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE |
DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE)) {
dev_warn(imxpd->dev, "invalid bus_flags (%x)\n", bus_flags);
return -EINVAL;
}
bridge_state->output_bus_cfg.flags = bus_flags;
bridge_state->input_bus_cfg.flags = bus_flags;
imx_crtc_state->bus_flags = bus_flags;