drm/imx: convey the pixelclk-active and de-active flags from DT to the ipu-di driver

The 'de-active' and 'pixelclk-active' DT properties are evaluated
by of_parse_display_timing() called from  of_get_drm_display_mode(),
but later lost in the conversion from videomode.flags to
drm_display_mode.flags.
Enhance of_get_drm_display_mode() to also return the bus flags in a
separate variable, so that they can be passed on to the ipu-di
driver.

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

1 files changed, 7 insertions, 3 deletions

diff --git a/drivers/gpu/drm/imx/parallel-display.c b/drivers/gpu/drm/imx/parallel-display.c
index 1dad297b01fd..74b0ac06fdab 100644
--- a/drivers/gpu/drm/imx/parallel-display.c
+++ b/drivers/gpu/drm/imx/parallel-display.c
@@ -33,6 +33,7 @@ struct imx_parallel_display {
         void *edid;
         int edid_len;
         u32 bus_format;
+        u32 bus_flags;
         struct drm_display_mode mode;
         struct drm_panel *panel;
         struct drm_bridge *bridge;
@@ -80,6 +81,7 @@ static int imx_pd_connector_get_modes(struct drm_connector *connector)
                         return -EINVAL;
 
                 ret = of_get_drm_display_mode(np, &imxpd->mode,
+                                              &imxpd->bus_flags,
                                               OF_USE_NATIVE_MODE);
                 if (ret)
                         return ret;
@@ -125,11 +127,13 @@ static int imx_pd_encoder_atomic_check(struct drm_encoder *encoder,
         struct drm_display_info *di = &conn_state->connector->display_info;
         struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
 
-        imx_crtc_state->bus_flags = di->bus_flags;
-        if (!imxpd->bus_format && di->num_bus_formats)
+        if (!imxpd->bus_format && di->num_bus_formats) {
+                imx_crtc_state->bus_flags = di->bus_flags;
                 imx_crtc_state->bus_format = di->bus_formats[0];
-        else
+        } else {
+                imx_crtc_state->bus_flags = imxpd->bus_flags;
                 imx_crtc_state->bus_format = imxpd->bus_format;
+        }
         imx_crtc_state->di_hsync_pin = 2;
         imx_crtc_state->di_vsync_pin = 3;