[PATCH] drm: mxsfb: Obtain bus flags from bridge state
Marek Vasut
marex at denx.de
Wed Apr 6 09:29:29 UTC 2022
In case the MXSFB is connected to a bridge, attempt to obtain bus flags
from that bridge state too. The bus flags may specify e.g. the DE signal
polarity.
Signed-off-by: Marek Vasut <marex at denx.de>
Cc: Alexander Stein <alexander.stein at ew.tq-group.com>
Cc: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
Cc: Lucas Stach <l.stach at pengutronix.de>
Cc: Peng Fan <peng.fan at nxp.com>
Cc: Robby Cai <robby.cai at nxp.com>
Cc: Sam Ravnborg <sam at ravnborg.org>
Cc: Stefan Agner <stefan at agner.ch>
---
drivers/gpu/drm/mxsfb/mxsfb_kms.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/mxsfb/mxsfb_kms.c b/drivers/gpu/drm/mxsfb/mxsfb_kms.c
index 4baa3db1f3d10..c7f14ef1edc25 100644
--- a/drivers/gpu/drm/mxsfb/mxsfb_kms.c
+++ b/drivers/gpu/drm/mxsfb/mxsfb_kms.c
@@ -298,6 +298,7 @@ static int mxsfb_reset_block(struct mxsfb_drm_private *mxsfb)
}
static void mxsfb_crtc_mode_set_nofb(struct mxsfb_drm_private *mxsfb,
+ struct drm_bridge_state *bridge_state,
const u32 bus_format)
{
struct drm_device *drm = mxsfb->crtc.dev;
@@ -307,6 +308,8 @@ static void mxsfb_crtc_mode_set_nofb(struct mxsfb_drm_private *mxsfb,
if (mxsfb->bridge && mxsfb->bridge->timings)
bus_flags = mxsfb->bridge->timings->input_bus_flags;
+ else if (bridge_state)
+ bus_flags = bridge_state->input_bus_cfg.flags;
DRM_DEV_DEBUG_DRIVER(drm->dev, "Pixel clock: %dkHz (actual: %dkHz)\n",
m->crtc_clock,
@@ -365,7 +368,7 @@ static void mxsfb_crtc_atomic_enable(struct drm_crtc *crtc,
{
struct mxsfb_drm_private *mxsfb = to_mxsfb_drm_private(crtc->dev);
struct drm_display_mode *m = &mxsfb->crtc.state->adjusted_mode;
- struct drm_bridge_state *bridge_state;
+ struct drm_bridge_state *bridge_state = NULL;
struct drm_device *drm = mxsfb->drm;
u32 bus_format = 0;
@@ -399,7 +402,7 @@ static void mxsfb_crtc_atomic_enable(struct drm_crtc *crtc,
pm_runtime_get_sync(drm->dev);
- mxsfb_crtc_mode_set_nofb(mxsfb, bus_format);
+ mxsfb_crtc_mode_set_nofb(mxsfb, bridge_state, bus_format);
/* Write cur_buf as well to avoid an initial corrupt frame */
mxsfb_update_buffer(mxsfb, crtc->primary, true);
--
2.35.1
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