drm/bridge: tc358767: fix output H/V syncs

[ Upstream commit 7923e09c7a766e2d58de7fc395bb84c18e5bc625 ]

The H and V syncs of the DP output are always set to active high. This
patch fixes the syncs by configuring them according to the videomode.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190103115954.12785-7-tomi.valkeinen@ti.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
index 16fa429..fa3f2f0 100644 (file)
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -96,6 +96,8 @@
 #define DP0_STARTVAL           0x064c
 #define DP0_ACTIVEVAL          0x0650
 #define DP0_SYNCVAL            0x0654
+#define SYNCVAL_HS_POL_ACTIVE_LOW      (1 << 15)
+#define SYNCVAL_VS_POL_ACTIVE_LOW      (1 << 31)
 #define DP0_MISC               0x0658
 #define TU_SIZE_RECOMMENDED            (63) /* LSCLK cycles per TU */
 #define BPC_6                          (0 << 5)
@@ -724,7 +726,9 @@ static int tc_set_video_mode(struct tc_data *tc, struct drm_display_mode *mode)
 
        tc_write(DP0_ACTIVEVAL, (mode->vdisplay << 16) | (mode->hdisplay));
 
-       tc_write(DP0_SYNCVAL, (vsync_len << 16) | (hsync_len << 0));
+       tc_write(DP0_SYNCVAL, (vsync_len << 16) | (hsync_len << 0) |
+                ((mode->flags & DRM_MODE_FLAG_NHSYNC) ? SYNCVAL_HS_POL_ACTIVE_LOW : 0) |
+                ((mode->flags & DRM_MODE_FLAG_NVSYNC) ? SYNCVAL_VS_POL_ACTIVE_LOW : 0));
 
        tc_write(DPIPXLFMT, VS_POL_ACTIVE_LOW | HS_POL_ACTIVE_LOW |
                 DE_POL_ACTIVE_HIGH | SUB_CFG_TYPE_CONFIG1 | DPI_BPP_RGB888);