drm/bridge: tc358767: don't fixup mode sync polarity

There is no need to enforce a specific sync signal polarity on the
DPI interface, as we can simply tell the TC358767 which polarities
it should expect on the input interface.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Marco Felsch <m.felsch@pengutronix.de>
Reviewed-by: Marek Vasut <marex@denx.de>
Tested-by: Marek Vasut <marex@denx.de>
Signed-off-by: Marek Vasut <marex@denx.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20220706132812.2171250-1-l.stach@pengutronix.de

diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
index 1dc107f..578aca2 100644 (file)
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -889,6 +889,7 @@ static int tc_set_edp_video_mode(struct tc_data *tc,
        u32 dp0_syncval;
        u32 bits_per_pixel = 24;
        u32 in_bw, out_bw;
+       u32 dpipxlfmt;
 
        /*
         * Recommended maximum number of symbols transferred in a transfer unit:
@@ -938,10 +939,15 @@ static int tc_set_edp_video_mode(struct tc_data *tc,
        if (ret)
                return ret;
 
-       ret = regmap_write(tc->regmap, DPIPXLFMT,
-                          VS_POL_ACTIVE_LOW | HS_POL_ACTIVE_LOW |
-                          DE_POL_ACTIVE_HIGH | SUB_CFG_TYPE_CONFIG1 |
-                          DPI_BPP_RGB888);
+       dpipxlfmt = DE_POL_ACTIVE_HIGH | SUB_CFG_TYPE_CONFIG1 | DPI_BPP_RGB888;
+
+       if (mode->flags & DRM_MODE_FLAG_NVSYNC)
+               dpipxlfmt |= VS_POL_ACTIVE_LOW;
+
+       if (mode->flags & DRM_MODE_FLAG_NHSYNC)
+               dpipxlfmt |= HS_POL_ACTIVE_LOW;
+
+       ret = regmap_write(tc->regmap, DPIPXLFMT, dpipxlfmt);
        if (ret)
                return ret;
 
@@ -1496,41 +1502,16 @@ tc_edp_bridge_atomic_disable(struct drm_bridge *bridge,
                dev_err(tc->dev, "main link disable error: %d\n", ret);
 }
 
-static bool tc_bridge_mode_fixup(struct drm_bridge *bridge,
-                                const struct drm_display_mode *mode,
-                                struct drm_display_mode *adj)
-{
-       /* Fixup sync polarities, both hsync and vsync are active low */
-       adj->flags = mode->flags;
-       adj->flags |= (DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC);
-       adj->flags &= ~(DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC);
-
-       return true;
-}
-
-static int tc_common_atomic_check(struct drm_bridge *bridge,
-                                 struct drm_bridge_state *bridge_state,
-                                 struct drm_crtc_state *crtc_state,
-                                 struct drm_connector_state *conn_state,
-                                 const unsigned int max_khz)
-{
-       tc_bridge_mode_fixup(bridge, &crtc_state->mode,
-                            &crtc_state->adjusted_mode);
-
-       if (crtc_state->adjusted_mode.clock > max_khz)
-               return -EINVAL;
-
-       return 0;
-}
-
 static int tc_dpi_atomic_check(struct drm_bridge *bridge,
                               struct drm_bridge_state *bridge_state,
                               struct drm_crtc_state *crtc_state,
                               struct drm_connector_state *conn_state)
 {
        /* DSI->DPI interface clock limitation: upto 100 MHz */
-       return tc_common_atomic_check(bridge, bridge_state, crtc_state,
-                                     conn_state, 100000);
+       if (crtc_state->adjusted_mode.clock > 100000)
+               return -EINVAL;
+
+       return 0;
 }
 
 static int tc_edp_atomic_check(struct drm_bridge *bridge,
@@ -1539,8 +1520,10 @@ static int tc_edp_atomic_check(struct drm_bridge *bridge,
                               struct drm_connector_state *conn_state)
 {
        /* DPI->(e)DP interface clock limitation: upto 154 MHz */
-       return tc_common_atomic_check(bridge, bridge_state, crtc_state,
-                                     conn_state, 154000);
+       if (crtc_state->adjusted_mode.clock > 154000)
+               return -EINVAL;
+
+       return 0;
 }
 
 static enum drm_mode_status
@@ -1783,7 +1766,6 @@ static const struct drm_bridge_funcs tc_edp_bridge_funcs = {
        .atomic_check = tc_edp_atomic_check,
        .atomic_enable = tc_edp_bridge_atomic_enable,
        .atomic_disable = tc_edp_bridge_atomic_disable,
-       .mode_fixup = tc_bridge_mode_fixup,
        .detect = tc_bridge_detect,
        .get_edid = tc_get_edid,
        .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,