From: Joshua Aberback <joshua.aberback@xxxxxxx>
[Why]
The function to count the number of valid connectors does not
guarantee that the first n indices are valid, only that there
exist n valid indices. When invalid indices are present, this
results in later valid connectors being missed, as processing
would end after checking n indices.
[How]
- count valid indices separately from total indices examined
- add explicit definition of MAX_LINKS
Reviewed-by: Dillon Varone <dillon.varone@xxxxxxx>
Acked-by: Roman Li <roman.li@xxxxxxx>
Signed-off-by: Joshua Aberback <joshua.aberback@xxxxxxx>
Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx>
---
drivers/gpu/drm/amd/display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c | 2 +-
drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c | 2 +-
drivers/gpu/drm/amd/display/dc/clk_mgr/dcn30/dcn30_clk_mgr.c | 2 +-
drivers/gpu/drm/amd/display/dc/core/dc.c | 3 ++-
drivers/gpu/drm/amd/display/dc/dc.h | 2 +-
drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr_internal.h | 2 +-
drivers/gpu/drm/amd/display/dc/inc/hw/hw_shared.h | 1 +
.../gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c | 4 ++--
8 files changed, 10 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c
index 5ee87965a078..bb4f3bd7532e 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c
@@ -503,7 +503,7 @@ static void dcn2_notify_link_rate_change(struct clk_mgr *clk_mgr_base, struct dc
clk_mgr->cur_phyclk_req_table[link->link_index] = link->cur_link_settings.link_rate * LINK_RATE_REF_FREQ_IN_KHZ;
- for (i = 0; i < MAX_PIPES * 2; i++) {
+ for (i = 0; i < MAX_LINKS; i++) {
if (clk_mgr->cur_phyclk_req_table[i] > max_phyclk_req)
max_phyclk_req = clk_mgr->cur_phyclk_req_table[i];
}
diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c
index e3e1940198a9..f65bb4c21b7d 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c
@@ -548,7 +548,7 @@ static void rn_notify_link_rate_change(struct clk_mgr *clk_mgr_base, struct dc_l
clk_mgr->cur_phyclk_req_table[link->link_index] = link->cur_link_settings.link_rate * LINK_RATE_REF_FREQ_IN_KHZ;
- for (i = 0; i < MAX_PIPES * 2; i++) {
+ for (i = 0; i < MAX_LINKS; i++) {
if (clk_mgr->cur_phyclk_req_table[i] > max_phyclk_req)
max_phyclk_req = clk_mgr->cur_phyclk_req_table[i];
}
diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn30/dcn30_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn30/dcn30_clk_mgr.c
index 3271c8c7905d..4cb0db0ed92f 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn30/dcn30_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn30/dcn30_clk_mgr.c
@@ -474,7 +474,7 @@ static void dcn30_notify_link_rate_change(struct clk_mgr *clk_mgr_base, struct d
clk_mgr->cur_phyclk_req_table[link->link_index] = link->cur_link_settings.link_rate * LINK_RATE_REF_FREQ_IN_KHZ;
- for (i = 0; i < MAX_PIPES * 2; i++) {
+ for (i = 0; i < MAX_LINKS; i++) {
if (clk_mgr->cur_phyclk_req_table[i] > max_phyclk_req)
max_phyclk_req = clk_mgr->cur_phyclk_req_table[i];
}
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 667655d0e5b9..c3510cdd0ec8 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -212,7 +212,8 @@ static bool create_links(
connectors_num,
num_virtual_links);
- for (i = 0; i < connectors_num; i++) {
+ // condition loop on link_count to allow skipping invalid indices
+ for (i = 0; dc->link_count < connectors_num && i < MAX_LINKS; i++) {
struct link_init_data link_init_params = {0};
struct dc_link *link;
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index 29fd8daa9d15..3ed41cf6a59d 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -1327,7 +1327,7 @@ struct dc {
struct dc_phy_addr_space_config vm_pa_config;
uint8_t link_count;
- struct dc_link *links[MAX_PIPES * 2];
+ struct dc_link *links[MAX_LINKS];
struct link_service *link_srv;
struct dc_state *current_state;
diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr_internal.h b/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr_internal.h
index f4d4a68c91dc..4ba18ea57aad 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr_internal.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr_internal.h
@@ -349,7 +349,7 @@ struct clk_mgr_internal {
enum dm_pp_clocks_state cur_min_clks_state;
bool periodic_retraining_disabled;
- unsigned int cur_phyclk_req_table[MAX_PIPES * 2];
+ unsigned int cur_phyclk_req_table[MAX_LINKS];
bool smu_present;
void *wm_range_table;
diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/hw_shared.h b/drivers/gpu/drm/amd/display/dc/inc/hw/hw_shared.h
index c1835ad6550f..c80ebb407add 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/hw/hw_shared.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw/hw_shared.h
@@ -44,6 +44,7 @@
*/
#define MAX_PIPES 6
#define MAX_PHANTOM_PIPES (MAX_PIPES / 2)
+#define MAX_LINKS (MAX_PIPES * 2)
#define MAX_DIG_LINK_ENCODERS 7
#define MAX_DWB_PIPES 1
#define MAX_HPO_DP2_ENCODERS 4
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c
index 5491b707cec8..68a8fd7f84d0 100644
--- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c
@@ -166,7 +166,7 @@ static uint8_t get_lowest_dpia_index(struct dc_link *link)
uint8_t idx = 0xFF;
int i;
- for (i = 0; i < MAX_PIPES * 2; ++i) {
+ for (i = 0; i < MAX_LINKS; ++i) {
if (!dc_struct->links[i] ||
dc_struct->links[i]->ep_type != DISPLAY_ENDPOINT_USB4_DPIA)
@@ -196,7 +196,7 @@ static int get_host_router_total_dp_tunnel_bw(const struct dc *dc, uint8_t hr_in
struct dc_link *link_dpia_primary, *link_dpia_secondary;
int total_bw = 0;
- for (uint8_t i = 0; i < (MAX_PIPES * 2) - 1; ++i) {
+ for (uint8_t i = 0; i < MAX_LINKS - 1; ++i) {
if (!dc->links[i] || dc->links[i]->ep_type != DISPLAY_ENDPOINT_USB4_DPIA)
continue;
--
2.34.1
