From: Taimur Hassan <Syed.Hassan@xxxxxxx>
[Why]
Pixel rate divider values should never be set to N/A (0xF) as the K1/K2
field is only 1/2 bits wide.
[How]
Set valid divider values for virtual and FRL/DP2 cases.
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@xxxxxxx>
Acked-by: Brian Chang <Brian.Chang@xxxxxxx>
Signed-off-by: Taimur Hassan <Syed.Hassan@xxxxxxx>
---
drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dccg.c | 7 +++++++
drivers/gpu/drm/amd/display/dc/dcn314/dcn314_hwseq.c | 6 ++----
drivers/gpu/drm/amd/display/dc/dcn32/dcn32_dccg.c | 4 +++-
drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c | 4 +---
4 files changed, 13 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dccg.c b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dccg.c
index 367cb6e6d074..0b769ee71405 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dccg.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dccg.c
@@ -96,6 +96,13 @@ static void dccg314_set_pixel_rate_div(
struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg);
enum pixel_rate_div cur_k1 = PIXEL_RATE_DIV_NA, cur_k2 = PIXEL_RATE_DIV_NA;
+ // Don't program 0xF into the register field. Not valid since
+ // K1 / K2 field is only 1 / 2 bits wide
+ if (k1 == PIXEL_RATE_DIV_NA || k2 == PIXEL_RATE_DIV_NA) {
+ BREAK_TO_DEBUGGER();
+ return;
+ }
+
dccg314_get_pixel_rate_div(dccg, otg_inst, &cur_k1, &cur_k2);
if (k1 == cur_k1 && k2 == cur_k2)
return;
diff --git a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_hwseq.c
index 588c1c71241f..a0741794db62 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_hwseq.c
@@ -348,10 +348,8 @@ unsigned int dcn314_calculate_dccg_k1_k2_values(struct pipe_ctx *pipe_ctx, unsig
two_pix_per_container = optc2_is_two_pixels_per_containter(&stream->timing);
odm_combine_factor = get_odm_config(pipe_ctx, NULL);
- if (pipe_ctx->stream->signal == SIGNAL_TYPE_VIRTUAL)
- return odm_combine_factor;
-
if (is_dp_128b_132b_signal(pipe_ctx)) {
+ *k1_div = PIXEL_RATE_DIV_BY_1;
*k2_div = PIXEL_RATE_DIV_BY_1;
} else if (dc_is_hdmi_tmds_signal(pipe_ctx->stream->signal) || dc_is_dvi_signal(pipe_ctx->stream->signal)) {
*k1_div = PIXEL_RATE_DIV_BY_1;
@@ -359,7 +357,7 @@ unsigned int dcn314_calculate_dccg_k1_k2_values(struct pipe_ctx *pipe_ctx, unsig
*k2_div = PIXEL_RATE_DIV_BY_2;
else
*k2_div = PIXEL_RATE_DIV_BY_4;
- } else if (dc_is_dp_signal(pipe_ctx->stream->signal)) {
+ } else if (dc_is_dp_signal(pipe_ctx->stream->signal) || dc_is_virtual_signal(pipe_ctx->stream->signal)) {
if (two_pix_per_container) {
*k1_div = PIXEL_RATE_DIV_BY_1;
*k2_div = PIXEL_RATE_DIV_BY_2;
diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_dccg.c b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_dccg.c
index e4daed44ef5f..df4f25119142 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_dccg.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_dccg.c
@@ -96,8 +96,10 @@ static void dccg32_set_pixel_rate_div(
// Don't program 0xF into the register field. Not valid since
// K1 / K2 field is only 1 / 2 bits wide
- if (k1 == PIXEL_RATE_DIV_NA || k2 == PIXEL_RATE_DIV_NA)
+ if (k1 == PIXEL_RATE_DIV_NA || k2 == PIXEL_RATE_DIV_NA) {
+ BREAK_TO_DEBUGGER();
return;
+ }
dccg32_get_pixel_rate_div(dccg, otg_inst, &cur_k1, &cur_k2);
if (k1 == cur_k1 && k2 == cur_k2)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c
index 61f129faf251..2f19f711d8be 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c
@@ -1175,10 +1175,8 @@ unsigned int dcn32_calculate_dccg_k1_k2_values(struct pipe_ctx *pipe_ctx, unsign
two_pix_per_container = optc2_is_two_pixels_per_containter(&stream->timing);
odm_combine_factor = get_odm_config(pipe_ctx, NULL);
- if (pipe_ctx->stream->signal == SIGNAL_TYPE_VIRTUAL)
- return odm_combine_factor;
-
if (is_dp_128b_132b_signal(pipe_ctx)) {
+ *k1_div = PIXEL_RATE_DIV_BY_1;
*k2_div = PIXEL_RATE_DIV_BY_1;
} else if (dc_is_hdmi_tmds_signal(pipe_ctx->stream->signal) || dc_is_dvi_signal(pipe_ctx->stream->signal)) {
*k1_div = PIXEL_RATE_DIV_BY_1;
--
2.25.1
