drm/bridge/sii8620: fix display of packed pixel modes in MHL2

Currently packed pixel modes in MHL2 can't be displayed. The device
automatically recognizes output format, so setting format other than
RGB causes failure. Fix it by writing proper values to registers.

Tested on MHL1 and MHL2 using various vendors' dongles both in
DVI and HDMI mode.

Signed-off-by: Maciej Purski <m.purski@samsung.com>
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1516706239-9104-1-git-send-email-m.purski@samsung.com

diff --git a/drivers/gpu/drm/bridge/sil-sii8620.c b/drivers/gpu/drm/bridge/sil-sii8620.c
index 4a3deeda065c87093a32ca091f1ccaa005cd7159..250effa0e6b83184e4ff60986b10ecaa1334eef1 100644 (file)
--- a/drivers/gpu/drm/bridge/sil-sii8620.c
+++ b/drivers/gpu/drm/bridge/sil-sii8620.c
@@ -1017,20 +1017,11 @@ static void sii8620_stop_video(struct sii8620 *ctx)
 
 static void sii8620_set_format(struct sii8620 *ctx)
 {
-       u8 out_fmt;
-
        if (sii8620_is_mhl3(ctx)) {
                sii8620_setbits(ctx, REG_M3_P0CTRL,
                                BIT_M3_P0CTRL_MHL3_P0_PIXEL_MODE_PACKED,
                                ctx->use_packed_pixel ? ~0 : 0);
        } else {
-               if (ctx->use_packed_pixel)
-                       sii8620_write_seq_static(ctx,
-                               REG_VID_MODE, BIT_VID_MODE_M1080P,
-                               REG_MHL_TOP_CTL, BIT_MHL_TOP_CTL_MHL_PP_SEL | 1,
-                               REG_MHLTX_CTL6, 0x60
-                       );
-               else
                        sii8620_write_seq_static(ctx,
                                REG_VID_MODE, 0,
                                REG_MHL_TOP_CTL, 1,
@@ -1038,15 +1029,9 @@ static void sii8620_set_format(struct sii8620 *ctx)
                        );
        }
 
-       if (ctx->use_packed_pixel)
-               out_fmt = VAL_TPI_FORMAT(YCBCR422, FULL) |
-                       BIT_TPI_OUTPUT_CSCMODE709;
-       else
-               out_fmt = VAL_TPI_FORMAT(RGB, FULL);
-
        sii8620_write_seq(ctx,
                REG_TPI_INPUT, VAL_TPI_FORMAT(RGB, FULL),
-               REG_TPI_OUTPUT, out_fmt,
+               REG_TPI_OUTPUT, VAL_TPI_FORMAT(RGB, FULL),
        );
 }