From: Quentin Schulz quentin.schulz@free-electrons.com
dp_get_lane_status is pretty generic and can be used for other means, so let's make it "public".
This adds drm_dp_get_lane_status to the header file and add the appropriate EXPORT_SYMBOL for it so that it can be used by other drivers, be they compiled built-in or as modules.
Signed-off-by: Quentin Schulz quentin.schulz@free-electrons.com Signed-off-by: Damian Kos dkos@cadence.com --- drivers/gpu/drm/drm_dp_helper.c | 9 +++++---- include/drm/drm_dp_helper.h | 2 ++ 2 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index 735ebde5c2f0..169db52f92f5 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -48,14 +48,15 @@ static u8 dp_link_status(const u8 link_status[DP_LINK_STATUS_SIZE], int r) return link_status[r - DP_LANE0_1_STATUS]; }
-static u8 dp_get_lane_status(const u8 link_status[DP_LINK_STATUS_SIZE], - int lane) +u8 drm_dp_get_lane_status(const u8 link_status[DP_LINK_STATUS_SIZE], + int lane) { int i = DP_LANE0_1_STATUS + (lane >> 1); int s = (lane & 1) * 4; u8 l = dp_link_status(link_status, i); return (l >> s) & 0xf; } +EXPORT_SYMBOL(drm_dp_get_lane_status);
bool drm_dp_channel_eq_ok(const u8 link_status[DP_LINK_STATUS_SIZE], int lane_count) @@ -69,7 +70,7 @@ bool drm_dp_channel_eq_ok(const u8 link_status[DP_LINK_STATUS_SIZE], if ((lane_align & DP_INTERLANE_ALIGN_DONE) == 0) return false; for (lane = 0; lane < lane_count; lane++) { - lane_status = dp_get_lane_status(link_status, lane); + lane_status = drm_dp_get_lane_status(link_status, lane); if ((lane_status & DP_CHANNEL_EQ_BITS) != DP_CHANNEL_EQ_BITS) return false; } @@ -84,7 +85,7 @@ bool drm_dp_clock_recovery_ok(const u8 link_status[DP_LINK_STATUS_SIZE], u8 lane_status;
for (lane = 0; lane < lane_count; lane++) { - lane_status = dp_get_lane_status(link_status, lane); + lane_status = drm_dp_get_lane_status(link_status, lane); if ((lane_status & DP_LANE_CR_DONE) == 0) return false; } diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index 698082a02b97..973d2fda9654 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -952,6 +952,8 @@ #define DP_MST_LOGICAL_PORT_0 8
#define DP_LINK_STATUS_SIZE 6 + +u8 drm_dp_get_lane_status(const u8 link_status[DP_LINK_STATUS_SIZE], int lane); bool drm_dp_channel_eq_ok(const u8 link_status[DP_LINK_STATUS_SIZE], int lane_count); bool drm_dp_clock_recovery_ok(const u8 link_status[DP_LINK_STATUS_SIZE],