[PATCH 6.8 306/336] drm/amd/display: Fix incorrect DSC instance for MST

Greg Kroah-Hartman
2024-05-14T10:53:15Z

From: Hersen Wu <hersenxs.wu@amd.com>

commit 892b41b16f6163e6556545835abba668fcab4eea upstream.

[Why] DSC debugfs, such as dp_dsc_clock_en_read,
use aconnector->dc_link to find pipe_ctx for display.
Displays connected to MST hub share the same dc_link.
DSC instance is from pipe_ctx. This causes incorrect
DSC instance for display connected to MST hub.

[How] Add aconnector->sink check to find pipe_ctx.

CC: stable@vger.kernel.org
Reviewed-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Hersen Wu <hersenxs.wu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 48 ++++++++++----
1 file changed, 36 insertions(+), 12 deletions(-)

--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
@@ -1495,7 +1495,9 @@ static ssize_t dp_dsc_clock_en_read(stru
for (i = 0; i < MAX_PIPES; i++) {
pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx->stream &&
- pipe_ctx->stream->link == aconnector->dc_link)
+ pipe_ctx->stream->link == aconnector->dc_link &&
+ pipe_ctx->stream->sink &&
+ pipe_ctx->stream->sink == aconnector->dc_sink)
break;
}

@@ -1596,7 +1598,9 @@ static ssize_t dp_dsc_clock_en_write(str
for (i = 0; i < MAX_PIPES; i++) {
pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx->stream &&
- pipe_ctx->stream->link == aconnector->dc_link)
+ pipe_ctx->stream->link == aconnector->dc_link &&
+ pipe_ctx->stream->sink &&
+ pipe_ctx->stream->sink == aconnector->dc_sink)
break;
}

@@ -1681,7 +1685,9 @@ static ssize_t dp_dsc_slice_width_read(s
for (i = 0; i < MAX_PIPES; i++) {
pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx->stream &&
- pipe_ctx->stream->link == aconnector->dc_link)
+ pipe_ctx->stream->link == aconnector->dc_link &&
+ pipe_ctx->stream->sink &&
+ pipe_ctx->stream->sink == aconnector->dc_sink)
break;
}

@@ -1780,7 +1786,9 @@ static ssize_t dp_dsc_slice_width_write(
for (i = 0; i < MAX_PIPES; i++) {
pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx->stream &&
- pipe_ctx->stream->link == aconnector->dc_link)
+ pipe_ctx->stream->link == aconnector->dc_link &&
+ pipe_ctx->stream->sink &&
+ pipe_ctx->stream->sink == aconnector->dc_sink)
break;
}

@@ -1865,7 +1873,9 @@ static ssize_t dp_dsc_slice_height_read(
for (i = 0; i < MAX_PIPES; i++) {
pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx->stream &&
- pipe_ctx->stream->link == aconnector->dc_link)
+ pipe_ctx->stream->link == aconnector->dc_link &&
+ pipe_ctx->stream->sink &&
+ pipe_ctx->stream->sink == aconnector->dc_sink)
break;
}

@@ -1964,7 +1974,9 @@ static ssize_t dp_dsc_slice_height_write
for (i = 0; i < MAX_PIPES; i++) {
pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx->stream &&
- pipe_ctx->stream->link == aconnector->dc_link)
+ pipe_ctx->stream->link == aconnector->dc_link &&
+ pipe_ctx->stream->sink &&
+ pipe_ctx->stream->sink == aconnector->dc_sink)
break;
}

@@ -2045,7 +2057,9 @@ static ssize_t dp_dsc_bits_per_pixel_rea
for (i = 0; i < MAX_PIPES; i++) {
pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx->stream &&
- pipe_ctx->stream->link == aconnector->dc_link)
+ pipe_ctx->stream->link == aconnector->dc_link &&
+ pipe_ctx->stream->sink &&
+ pipe_ctx->stream->sink == aconnector->dc_sink)
break;
}

@@ -2141,7 +2155,9 @@ static ssize_t dp_dsc_bits_per_pixel_wri
for (i = 0; i < MAX_PIPES; i++) {
pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx->stream &&
- pipe_ctx->stream->link == aconnector->dc_link)
+ pipe_ctx->stream->link == aconnector->dc_link &&
+ pipe_ctx->stream->sink &&
+ pipe_ctx->stream->sink == aconnector->dc_sink)
break;
}

@@ -2220,7 +2236,9 @@ static ssize_t dp_dsc_pic_width_read(str
for (i = 0; i < MAX_PIPES; i++) {
pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx->stream &&
- pipe_ctx->stream->link == aconnector->dc_link)
+ pipe_ctx->stream->link == aconnector->dc_link &&
+ pipe_ctx->stream->sink &&
+ pipe_ctx->stream->sink == aconnector->dc_sink)
break;
}

@@ -2276,7 +2294,9 @@ static ssize_t dp_dsc_pic_height_read(st
for (i = 0; i < MAX_PIPES; i++) {
pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx->stream &&
- pipe_ctx->stream->link == aconnector->dc_link)
+ pipe_ctx->stream->link == aconnector->dc_link &&
+ pipe_ctx->stream->sink &&
+ pipe_ctx->stream->sink == aconnector->dc_sink)
break;
}

@@ -2347,7 +2367,9 @@ static ssize_t dp_dsc_chunk_size_read(st
for (i = 0; i < MAX_PIPES; i++) {
pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx->stream &&
- pipe_ctx->stream->link == aconnector->dc_link)
+ pipe_ctx->stream->link == aconnector->dc_link &&
+ pipe_ctx->stream->sink &&
+ pipe_ctx->stream->sink == aconnector->dc_sink)
break;
}

@@ -2418,7 +2440,9 @@ static ssize_t dp_dsc_slice_bpg_offset_r
for (i = 0; i < MAX_PIPES; i++) {
pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx->stream &&
- pipe_ctx->stream->link == aconnector->dc_link)
+ pipe_ctx->stream->link == aconnector->dc_link &&
+ pipe_ctx->stream->sink &&
+ pipe_ctx->stream->sink == aconnector->dc_sink)
break;
}