The driver uses the encoder to get the mode that shall be configured. This is not possible, if the driver is used as a bridge, because the encoder might not be used.
Use the mode_set function to get the display mode.
Signed-off-by: Michael Tretter m.tretter@pengutronix.de --- drivers/gpu/drm/exynos/exynos_drm_dsi.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c index 31d62c10614a..657de5407190 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c +++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c @@ -275,6 +275,8 @@ struct exynos_dsi { u32 mode_flags; u32 format;
+ struct drm_display_mode mode; + int state; struct drm_property *brightness; struct completion completed; @@ -883,7 +885,7 @@ static int exynos_dsi_init_link(struct exynos_dsi *dsi)
static void exynos_dsi_set_display_mode(struct exynos_dsi *dsi) { - struct drm_display_mode *m = &dsi->encoder.crtc->state->adjusted_mode; + struct drm_display_mode *m = &dsi->mode; unsigned int num_bits_resol = dsi->driver_data->num_bits_resol; u32 reg;
@@ -1544,10 +1546,21 @@ static void exynos_dsi_bridge_disable(struct drm_bridge *bridge) exynos_dsi_disable(dsi); }
+static void exynos_dsi_bridge_mode_set(struct drm_bridge *bridge, + const struct drm_display_mode *mode, + const struct drm_display_mode *adjusted_mode) +{ + struct exynos_dsi *dsi = bridge->driver_private; + + /* The mode is set when actually enabling the device. */ + drm_mode_copy(&dsi->mode, adjusted_mode); +} + static const struct drm_bridge_funcs exynos_dsi_bridge_funcs = { .attach = exynos_dsi_bridge_attach, .enable = exynos_dsi_bridge_enable, .disable = exynos_dsi_bridge_disable, + .mode_set = exynos_dsi_bridge_mode_set, };
MODULE_DEVICE_TABLE(of, exynos_dsi_of_match);