drm: extract drm_dp_max_lane_count helper
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Dave Airlie <airlied@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index f7b7bfc..e0b91cb 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -125,19 +125,6 @@
}
static int
-intel_dp_max_lane_count(struct intel_dp *intel_dp)
-{
- int max_lane_count = intel_dp->dpcd[DP_MAX_LANE_COUNT] & 0x1f;
- switch (max_lane_count) {
- case 1: case 2: case 4:
- break;
- default:
- max_lane_count = 4;
- }
- return max_lane_count;
-}
-
-static int
intel_dp_max_link_bw(struct intel_dp *intel_dp)
{
int max_link_bw = intel_dp->dpcd[DP_MAX_LINK_RATE];
@@ -197,7 +184,7 @@
bool adjust_mode)
{
int max_link_clock = intel_dp_link_clock(intel_dp_max_link_bw(intel_dp));
- int max_lanes = intel_dp_max_lane_count(intel_dp);
+ int max_lanes = drm_dp_max_lane_count(intel_dp->dpcd);
int max_rate, mode_rate;
mode_rate = intel_dp_link_required(mode->clock, 24);
@@ -699,7 +686,7 @@
struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
struct intel_connector *intel_connector = intel_dp->attached_connector;
int lane_count, clock;
- int max_lane_count = intel_dp_max_lane_count(intel_dp);
+ int max_lane_count = drm_dp_max_lane_count(intel_dp->dpcd);
int max_clock = intel_dp_max_link_bw(intel_dp) == DP_LINK_BW_2_7 ? 1 : 0;
int bpp, mode_rate;
static int bws[2] = { DP_LINK_BW_1_62, DP_LINK_BW_2_7 };
diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c
index 093e17d..064023b 100644
--- a/drivers/gpu/drm/radeon/atombios_dp.c
+++ b/drivers/gpu/drm/radeon/atombios_dp.c
@@ -347,11 +347,6 @@
return (link_rate * lane_num * 8) / bpp;
}
-static u8 dp_get_max_lane_number(u8 dpcd[DP_DPCD_SIZE])
-{
- return dpcd[DP_MAX_LANE_COUNT] & DP_MAX_LANE_COUNT_MASK;
-}
-
/***** radeon specific DP functions *****/
/* First get the min lane# when low rate is used according to pixel clock
@@ -364,7 +359,7 @@
{
int bpp = convert_bpc_to_bpp(radeon_get_monitor_bpc(connector));
int max_link_rate = drm_dp_max_link_rate(dpcd);
- int max_lane_num = dp_get_max_lane_number(dpcd);
+ int max_lane_num = drm_dp_max_lane_count(dpcd);
int lane_num;
int max_dp_pix_clock;