Add support for handling the HS/VS sync signals polarity in the bridge
driver, otherwise e.g. DSIM bridge feeds the TC358762 inverted polarity
sync signals and the image is shifted to the left, up, and wobbly.
Signed-off-by: Marek Vasut <marex@xxxxxxx>
---
Cc: Andrzej Hajda <andrzej.hajda@xxxxxxxxx>
Cc: Daniel Vetter <daniel@xxxxxxxx>
Cc: David Airlie <airlied@xxxxxxxxx>
Cc: Jernej Skrabec <jernej.skrabec@xxxxxxxxx>
Cc: Jonas Karlman <jonas@xxxxxxxxx>
Cc: Laurent Pinchart <Laurent.pinchart@xxxxxxxxxxxxxxxx>
Cc: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
Cc: Robert Foss <rfoss@xxxxxxxxxx>
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
---
drivers/gpu/drm/bridge/tc358762.c | 27 +++++++++++++++++++++++++--
1 file changed, 25 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/bridge/tc358762.c b/drivers/gpu/drm/bridge/tc358762.c
index a092e2096074f..46198af9eebbf 100644
--- a/drivers/gpu/drm/bridge/tc358762.c
+++ b/drivers/gpu/drm/bridge/tc358762.c
@@ -74,6 +74,7 @@ struct tc358762 {
struct regulator *regulator;
struct drm_bridge *panel_bridge;
struct gpio_desc *reset_gpio;
+ struct drm_display_mode mode;
bool pre_enabled;
int error;
};
@@ -114,6 +115,8 @@ static inline struct tc358762 *bridge_to_tc358762(struct drm_bridge *bridge)
static int tc358762_init(struct tc358762 *ctx)
{
+ u32 lcdctrl;
+
tc358762_write(ctx, DSI_LANEENABLE,
LANEENABLE_L0EN | LANEENABLE_CLEN);
tc358762_write(ctx, PPI_D0S_CLRSIPOCOUNT, 5);
@@ -123,8 +126,18 @@ static int tc358762_init(struct tc358762 *ctx)
tc358762_write(ctx, PPI_LPTXTIMECNT, LPX_PERIOD);
tc358762_write(ctx, SPICMR, 0x00);
- tc358762_write(ctx, LCDCTRL, LCDCTRL_VSDELAY(1) | LCDCTRL_RGB888 |
- LCDCTRL_UNK6 | LCDCTRL_VTGEN);
+
+ lcdctrl = LCDCTRL_VSDELAY(1) | LCDCTRL_RGB888 |
+ LCDCTRL_UNK6 | LCDCTRL_VTGEN;
+
+ if (ctx->mode.flags & DRM_MODE_FLAG_NHSYNC)
+ lcdctrl |= LCDCTRL_HSPOL;
+
+ if (ctx->mode.flags & DRM_MODE_FLAG_NVSYNC)
+ lcdctrl |= LCDCTRL_VSPOL;
+
+ tc358762_write(ctx, LCDCTRL, lcdctrl);
+
tc358762_write(ctx, SYSCTRL, 0x040f);
msleep(100);
@@ -194,6 +207,15 @@ static int tc358762_attach(struct drm_bridge *bridge,
bridge, flags);
}
+static void tc358762_bridge_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adj)
+{
+ struct tc358762 *ctx = bridge_to_tc358762(bridge);
+
+ drm_mode_copy(&ctx->mode, mode);
+}
+
static const struct drm_bridge_funcs tc358762_bridge_funcs = {
.atomic_post_disable = tc358762_post_disable,
.atomic_pre_enable = tc358762_pre_enable,
@@ -202,6 +224,7 @@ static const struct drm_bridge_funcs tc358762_bridge_funcs = {
.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
.atomic_reset = drm_atomic_helper_bridge_reset,
.attach = tc358762_attach,
+ .mode_set = tc358762_bridge_mode_set,
};
static int tc358762_parse_dt(struct tc358762 *ctx)
--
2.39.2
