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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>
This commit is contained in:
Daniel Vetter 2012-10-22 22:56:43 +02:00
parent 3b5c662e8f
commit 397fe15715
3 changed files with 10 additions and 21 deletions
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17
drivers/gpu/drm/i915/intel_dp.c
View File

@ -124,19 +124,6 @@ intel_edp_target_clock(struct intel_encoder *intel_encoder,
return mode->clock;
}
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)
{
@ -197,7 +184,7 @@ intel_dp_adjust_dithering(struct intel_dp *intel_dp,
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 @@ intel_dp_mode_fixup(struct drm_encoder *encoder,
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 };

7
drivers/gpu/drm/radeon/atombios_dp.c
View File

@ -347,11 +347,6 @@ static int dp_get_max_dp_pix_clock(int link_rate,
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 @@ static int radeon_dp_get_dp_lane_number(struct drm_connector *connector,
{
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;

7
include/drm/drm_dp_helper.h
View File

@ -346,4 +346,11 @@ drm_dp_max_link_rate(u8 dpcd[DP_RECEIVER_CAP_SIZE])
{
return drm_dp_bw_code_to_link_rate(dpcd[DP_MAX_LINK_RATE]);
}
static inline u8
drm_dp_max_lane_count(u8 dpcd[DP_RECEIVER_CAP_SIZE])
{
return dpcd[DP_MAX_LANE_COUNT] & DP_MAX_LANE_COUNT_MASK;
}
#endif /* _DRM_DP_HELPER_H_ */