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drm/bridge: tc358762: Handle HS/VS polarity 

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@denx.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Robert Foss <rfoss@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230615201902.566182-5-marex@denx.de
This commit is contained in:
Marek Vasut 2023-06-15 22:19:02 +02:00 committed by Robert Foss
parent 80382226ef
commit 7f4e171f9d
No known key found for this signature in database
GPG Key ID: 3EFD900F76D1D784
1 changed files with 25 additions and 2 deletions
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27
drivers/gpu/drm/bridge/tc358762.c
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@ -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)