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

[ Upstream commit e8b92efa629dac0e70ea4145c5e70616de5f89c8 ]

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
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/bridge/sil-sii8620.c b/drivers/gpu/drm/bridge/sil-sii8620.c
index 8a8c3ed..33bd5d8 100644 (file)
--- a/drivers/gpu/drm/bridge/sil-sii8620.c
+++ b/drivers/gpu/drm/bridge/sil-sii8620.c
@@ -1038,20 +1038,11 @@ 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,
@@ -1059,15 +1050,9 @@ 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),
        );
 }