Am Sonntag, dem 17.04.2022 um 04:10 +0200 schrieb Marek Vasut:
> 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.
>
> Acked-by: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxx>
> Signed-off-by: Marek Vasut <marex@xxxxxxx>
> Cc: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxx>
> Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> Cc: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
> Cc: Peng Fan <peng.fan@xxxxxxx>
> Cc: Robby Cai <robby.cai@xxxxxxx>
> Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
> Cc: Stefan Agner <stefan@xxxxxxxx>
Reviewed-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
> ---
> V2: Add AB from Alexander
> ---
> 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 b7c70d269d2cb..cd2a59e110c3a 100644
> --- a/drivers/gpu/drm/mxsfb/mxsfb_kms.c
> +++ b/drivers/gpu/drm/mxsfb/mxsfb_kms.c
> @@ -275,6 +275,7 @@ 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;
> @@ -284,6 +285,8 @@ 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,
> @@ -345,7 +348,7 @@ static void mxsfb_crtc_atomic_enable(struct drm_crtc *crtc,
> struct mxsfb_drm_private *mxsfb = to_mxsfb_drm_private(crtc->dev);
> struct drm_plane_state *new_pstate = drm_atomic_get_new_plane_state(state,
> crtc->primary);
> - struct drm_bridge_state *bridge_state;
> + struct drm_bridge_state *bridge_state = NULL;
> struct drm_device *drm = mxsfb->drm;
> u32 bus_format = 0;
> dma_addr_t paddr;
> @@ -381,7 +384,7 @@ static void mxsfb_crtc_atomic_enable(struct drm_crtc *crtc,
> if (!bus_format)
> bus_format = MEDIA_BUS_FMT_RGB888_1X24;
>
> - 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 */
> paddr = drm_fb_cma_get_gem_addr(new_pstate->fb, new_pstate, 0);
