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, 8 insertions, 1 deletions

diff --git a/drivers/gpu/drm/imx/imx-ldb.c b/drivers/gpu/drm/imx/imx-ldb.c
index b03919ed60ba..3ed2d5037fe2 100644
--- a/drivers/gpu/drm/imx/imx-ldb.c
+++ b/drivers/gpu/drm/imx/imx-ldb.c
@@ -66,6 +66,7 @@ struct imx_ldb_channel {
         struct drm_display_mode mode;
         int mode_valid;
         u32 bus_format;
+        u32 bus_flags;
 };
 
 static inline struct imx_ldb_channel *con_to_imx_ldb_ch(struct drm_connector *c)
@@ -379,8 +380,13 @@ static int imx_ldb_encoder_atomic_check(struct drm_encoder *encoder,
         u32 bus_format = imx_ldb_ch->bus_format;
 
         /* Bus format description in DT overrides connector display info. */
-        if (!bus_format && di->num_bus_formats)
+        if (!bus_format && di->num_bus_formats) {
                 bus_format = di->bus_formats[0];
+                imx_crtc_state->bus_flags = di->bus_flags;
+        } else {
+                bus_format = imx_ldb_ch->bus_format;
+                imx_crtc_state->bus_flags = imx_ldb_ch->bus_flags;
+        }
         switch (bus_format) {
         case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
                 imx_crtc_state->bus_format = MEDIA_BUS_FMT_RGB666_1X18;
@@ -674,6 +680,7 @@ static int imx_ldb_bind(struct device *dev, struct device *master, void *data)
                                 /* fallback to display-timings node */
                                 ret = of_get_drm_display_mode(child,
                                                               &channel->mode,
+                                                              &channel->bus_flags,
                                                               OF_USE_NATIVE_MODE);
                                 if (!ret)
                                         channel->mode_valid = 1;