AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-11-24 04:20:53 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

drm/amd/display: Add get_dig_frontend implementation for DCEx

Browse Source 
commit 6bdeff12a96c9a5da95c8d11fefd145eb165e32a upstream.

Some old ASICs might not implement/require get_dig_frontend helper; in
this scenario, we can have a NULL pointer exception when we try to call
it inside vbios disable operation. For example, this situation might
happen when using Polaris12 with an eDP panel. This commit avoids this
situation by adding a specific get_dig_frontend implementation for DCEx.

Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Harry Wentland <Harry.Wentland@amd.com>
Cc: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Cc: Chiawen Huang <chiawen.huang@amd.com>
Reported-and-tested-by: Borislav Petkov <bp@suse.de>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rodrigo Siqueira 2020-12-15 10:33:34 -05:00 committed by Greg Kroah-Hartman
parent 5ef98378ef
commit 8b8a688260
2 changed files with 44 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c
View File

@ -119,7 +119,8 @@ static const struct link_encoder_funcs dce110_lnk_enc_funcs = {
.disable_hpd = dce110_link_encoder_disable_hpd,
.is_dig_enabled = dce110_is_dig_enabled,
.destroy = dce110_link_encoder_destroy,
.get_max_link_cap = dce110_link_encoder_get_max_link_cap
.get_max_link_cap = dce110_link_encoder_get_max_link_cap,
.get_dig_frontend = dce110_get_dig_frontend,
};
static enum bp_result link_transmitter_control(
@ -235,6 +236,44 @@ static void set_link_training_complete(
}
unsigned int dce110_get_dig_frontend(struct link_encoder *enc)
{
struct dce110_link_encoder *enc110 = TO_DCE110_LINK_ENC(enc);
u32 value;
enum engine_id result;
REG_GET(DIG_BE_CNTL, DIG_FE_SOURCE_SELECT, &value);
switch (value) {
case DCE110_DIG_FE_SOURCE_SELECT_DIGA:
result = ENGINE_ID_DIGA;
break;
case DCE110_DIG_FE_SOURCE_SELECT_DIGB:
result = ENGINE_ID_DIGB;
break;
case DCE110_DIG_FE_SOURCE_SELECT_DIGC:
result = ENGINE_ID_DIGC;
break;
case DCE110_DIG_FE_SOURCE_SELECT_DIGD:
result = ENGINE_ID_DIGD;
break;
case DCE110_DIG_FE_SOURCE_SELECT_DIGE:
result = ENGINE_ID_DIGE;
break;
case DCE110_DIG_FE_SOURCE_SELECT_DIGF:
result = ENGINE_ID_DIGF;
break;
case DCE110_DIG_FE_SOURCE_SELECT_DIGG:
result = ENGINE_ID_DIGG;
break;
default:
// invalid source select DIG
result = ENGINE_ID_UNKNOWN;
}
return result;
}
void dce110_link_encoder_set_dp_phy_pattern_training_pattern(
struct link_encoder *enc,
uint32_t index)
@ -1665,7 +1704,8 @@ static const struct link_encoder_funcs dce60_lnk_enc_funcs = {
.disable_hpd = dce110_link_encoder_disable_hpd,
.is_dig_enabled = dce110_is_dig_enabled,
.destroy = dce110_link_encoder_destroy,
.get_max_link_cap = dce110_link_encoder_get_max_link_cap
.get_max_link_cap = dce110_link_encoder_get_max_link_cap,
.get_dig_frontend = dce110_get_dig_frontend
};
void dce60_link_encoder_construct(

2
drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.h
View File

@ -295,6 +295,8 @@ void dce110_link_encoder_connect_dig_be_to_fe(
enum engine_id engine,
bool connect);
unsigned int dce110_get_dig_frontend(struct link_encoder *enc);
void dce110_link_encoder_set_dp_phy_pattern_training_pattern(
struct link_encoder *enc,
uint32_t index);