From cf878b22924bd680b7ffa8dc543e807544f02757 Mon Sep 17 00:00:00 2001
From: Michael Tretter <m.tretter@pengutronix.de>
Date: Fri, 11 Sep 2020 15:54:09 +0200
Subject: [PATCH] drm/exynos: configure mode on drm bridge
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 set 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 770be9a42641a..1dd76343bcc57 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
@@ -288,6 +288,8 @@ struct exynos_dsi {
u32 mode_flags;
u32 format;
+ struct drm_display_mode mode;
+
int state;
struct drm_property *brightness;
struct completion completed;
@@ -961,7 +963,7 @@ 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;
@@ -1659,11 +1661,22 @@ 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,
.detach = exynos_dsi_bridge_detach,
.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);
--
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