drm/amd/display: Don't allow dual-link DVI on all ASICs.

Our APUs (Carrizo, Stoney, Raven) don't support it.

v2: Don't use is_apu as other ASICs might also not support it

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_stream.c b/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
index 261811e..37dd109 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
@@ -45,8 +45,9 @@ static void update_stream_signal(struct dc_stream_state *stream)
                stream->signal = dc_sink->sink_signal;
 
        if (dc_is_dvi_signal(stream->signal)) {
-               if (stream->timing.pix_clk_khz > TMDS_MAX_PIXEL_CLOCK_IN_KHZ_UPMOST &&
-                       stream->sink->sink_signal != SIGNAL_TYPE_DVI_SINGLE_LINK)
+               if (stream->ctx->dc->caps.dual_link_dvi &&
+                   stream->timing.pix_clk_khz > TMDS_MAX_PIXEL_CLOCK_IN_KHZ_UPMOST &&
+                   stream->sink->sink_signal != SIGNAL_TYPE_DVI_SINGLE_LINK)
                        stream->signal = SIGNAL_TYPE_DVI_DUAL_LINK;
                else
                        stream->signal = SIGNAL_TYPE_DVI_SINGLE_LINK;

diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index 52867c6..15bd355 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -62,6 +62,7 @@ struct dc_caps {
        bool dcc_const_color;
        bool dynamic_audio;
        bool is_apu;
+       bool dual_link_dvi;
 };
 
 struct dc_dcc_surface_param {

diff --git a/drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c b/drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c
index 3ea43e2..442dd2d 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c
@@ -852,6 +852,7 @@ static bool construct(
        dc->caps.max_downscale_ratio = 200;
        dc->caps.i2c_speed_in_khz = 40;
        dc->caps.max_cursor_size = 128;
+       dc->caps.dual_link_dvi = true;
 
        for (i = 0; i < pool->base.pipe_count; i++) {
                pool->base.timing_generators[i] =

diff --git a/drivers/gpu/drm/amd/display/dc/dce112/dce112_resource.c b/drivers/gpu/drm/amd/display/dc/dce112/dce112_resource.c
index 663e0a0..98d9cd0 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dce112/dce112_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dce112/dce112_resource.c
@@ -1103,6 +1103,8 @@ static bool construct(
        dc->caps.max_downscale_ratio = 200;
        dc->caps.i2c_speed_in_khz = 100;
        dc->caps.max_cursor_size = 128;
+       dc->caps.dual_link_dvi = true;
+
 
        /*************************************************
         *  Create resources                             *

diff --git a/drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c b/drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c
index 57cd673..5aab01d 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c
@@ -835,6 +835,8 @@ static bool construct(
        dc->caps.max_downscale_ratio = 200;
        dc->caps.i2c_speed_in_khz = 100;
        dc->caps.max_cursor_size = 128;
+       dc->caps.dual_link_dvi = true;
+
        dc->debug = debug_defaults;
 
        /*************************************************

diff --git a/drivers/gpu/drm/amd/display/dc/dce80/dce80_resource.c b/drivers/gpu/drm/amd/display/dc/dce80/dce80_resource.c
index 8f2bd56..25d7eb1 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dce80/dce80_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dce80/dce80_resource.c
@@ -793,6 +793,7 @@ static bool dce80_construct(
        dc->caps.max_downscale_ratio = 200;
        dc->caps.i2c_speed_in_khz = 40;
        dc->caps.max_cursor_size = 128;
+       dc->caps.dual_link_dvi = true;
 
        /*************************************************
         *  Create resources                             *