From: Ville Syrjälä ville.syrjala@linux.intel.com
We want to differentiate between the DFP dotclock and TMDS clock limits. Let's convert the current thing to just give us the dotclock limit.
Signed-off-by: Ville Syrjälä ville.syrjala@linux.intel.com --- drivers/gpu/drm/drm_dp_helper.c | 42 ++++++++++--------------- drivers/gpu/drm/i915/display/intel_dp.c | 4 +-- include/drm/drm_dp_helper.h | 4 +-- 3 files changed, 20 insertions(+), 30 deletions(-)
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index 7164b9d274e1..0ae6849744c2 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -423,37 +423,32 @@ bool drm_dp_downstream_is_tmds(const u8 dpcd[DP_RECEIVER_CAP_SIZE], EXPORT_SYMBOL(drm_dp_downstream_is_tmds);
/** - * drm_dp_downstream_max_clock() - extract branch device max - * pixel rate for legacy VGA - * converter or max TMDS clock - * rate for others + * drm_dp_downstream_max_dotclock() - extract downstream facing port max dot clock * @dpcd: DisplayPort configuration data * @port_cap: port capabilities * - * Returns max clock in kHz on success or 0 if max clock not defined + * Returns downstream facing port max dot clock in kHz on success, + * or 0 if max clock not defined */ -int drm_dp_downstream_max_clock(const u8 dpcd[DP_RECEIVER_CAP_SIZE], - const u8 port_cap[4]) +int drm_dp_downstream_max_dotclock(const u8 dpcd[DP_RECEIVER_CAP_SIZE], + const u8 port_cap[4]) { - int type = port_cap[0] & DP_DS_PORT_TYPE_MASK; - bool detailed_cap_info = dpcd[DP_DOWNSTREAMPORT_PRESENT] & - DP_DETAILED_CAP_INFO_AVAILABLE; + if (!drm_dp_is_branch(dpcd)) + return 0;
- if (!detailed_cap_info) + if (dpcd[DP_DPCD_REV] < 0x11) return 0;
- switch (type) { + switch (port_cap[0] & DP_DS_PORT_TYPE_MASK) { case DP_DS_PORT_TYPE_VGA: - return port_cap[1] * 8 * 1000; - case DP_DS_PORT_TYPE_DVI: - case DP_DS_PORT_TYPE_HDMI: - case DP_DS_PORT_TYPE_DP_DUALMODE: - return port_cap[1] * 2500; + if ((dpcd[DP_DOWNSTREAMPORT_PRESENT] & DP_DETAILED_CAP_INFO_AVAILABLE) == 0) + return 0; + return port_cap[1] * 8000; default: return 0; } } -EXPORT_SYMBOL(drm_dp_downstream_max_clock); +EXPORT_SYMBOL(drm_dp_downstream_max_dotclock);
/** * drm_dp_downstream_max_bpc() - extract downstream facing port max @@ -596,14 +591,9 @@ void drm_dp_downstream_debug(struct seq_file *m, seq_printf(m, "\t\tSW: %d.%d\n", rev[0], rev[1]);
if (detailed_cap_info) { - clk = drm_dp_downstream_max_clock(dpcd, port_cap); - - if (clk > 0) { - if (type == DP_DS_PORT_TYPE_VGA) - seq_printf(m, "\t\tMax dot clock: %d kHz\n", clk); - else - seq_printf(m, "\t\tMax TMDS clock: %d kHz\n", clk); - } + clk = drm_dp_downstream_max_dotclock(dpcd, port_cap); + if (clk > 0) + seq_printf(m, "\t\tMax dot clock: %d kHz\n", clk);
bpc = drm_dp_downstream_max_bpc(dpcd, port_cap, edid);
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 706750f9379e..22c5995e31a7 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -252,8 +252,8 @@ intel_dp_downstream_max_dotclock(struct intel_dp *intel_dp) if (type != DP_DS_PORT_TYPE_VGA) return max_dotclk;
- ds_max_dotclk = drm_dp_downstream_max_clock(intel_dp->dpcd, - intel_dp->downstream_ports); + ds_max_dotclk = drm_dp_downstream_max_dotclock(intel_dp->dpcd, + intel_dp->downstream_ports);
if (ds_max_dotclk != 0) max_dotclk = min(max_dotclk, ds_max_dotclk); diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index 62637acaefee..39c1faf7dede 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -1480,8 +1480,8 @@ bool drm_dp_downstream_is_type(const u8 dpcd[DP_RECEIVER_CAP_SIZE], bool drm_dp_downstream_is_tmds(const u8 dpcd[DP_RECEIVER_CAP_SIZE], const u8 port_cap[4], const struct edid *edid); -int drm_dp_downstream_max_clock(const u8 dpcd[DP_RECEIVER_CAP_SIZE], - const u8 port_cap[4]); +int drm_dp_downstream_max_dotclock(const u8 dpcd[DP_RECEIVER_CAP_SIZE], + const u8 port_cap[4]); int drm_dp_downstream_max_bpc(const u8 dpcd[DP_RECEIVER_CAP_SIZE], const u8 port_cap[4], const struct edid *edid);