drm/msm/dp: Initialize the INTF_CONFIG register

[ Upstream commit f9a39932fa54b6421e751ada7a285da809146421 ]

Some bootloaders set the widebus enable bit in the INTF_CONFIG register,
but configuration of widebus isn't yet supported ensure that the
register has a known value, with widebus disabled.

Fixes: c943b4948b58 ("drm/msm/dp: add displayPort driver support")
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20210722024434.3313167-1-bjorn.andersson@linaro.org
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c
index 4963bfe6a4726358406ffa2ffb4c4baf54ca2e0e..aeca8b2ac5c6b07342306fd9e2ad3ca355593fd3 100644 (file)
--- a/drivers/gpu/drm/msm/dp/dp_catalog.c
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.c
@@ -740,6 +740,7 @@ int dp_catalog_panel_timing_cfg(struct dp_catalog *dp_catalog)
        dp_write_link(catalog, REG_DP_HSYNC_VSYNC_WIDTH_POLARITY,
                                dp_catalog->width_blanking);
        dp_write_link(catalog, REG_DP_ACTIVE_HOR_VER, dp_catalog->dp_active);
+       dp_write_p0(catalog, MMSS_DP_INTF_CONFIG, 0);
        return 0;
 }