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drm/amd/display: avoid reset DTBCLK at clock init

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[why & how]
this is to init to HW real DTBCLK.
and use real HW DTBCLK status to update internal logic state

Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Martin Leung <martin.leung@amd.com>
Signed-off-by: Charlene Liu <Charlene.Liu@amd.com>
Signed-off-by: Ausef Yousof <Ausef.Yousof@amd.com>
Signed-off-by: Tom Chung <chiahsuan.chung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Charlene Liu 2024-11-26 12:09:25 -05:00 committed by Alex Deucher
parent 230dced3e2
commit 0ae47e971b
1 changed files with 12 additions and 6 deletions
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18
drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c
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@ -401,6 +401,7 @@ void dcn35_update_clocks(struct clk_mgr *clk_mgr_base,
if (clk_mgr_base->clks.dtbclk_en && !new_clocks->dtbclk_en) {
if (clk_mgr->base.ctx->dc->config.allow_0_dtb_clk)
dcn35_smu_set_dtbclk(clk_mgr, false);
clk_mgr_base->clks.dtbclk_en = new_clocks->dtbclk_en;
}
/* check that we're not already in lower */
@ -418,11 +419,17 @@ void dcn35_update_clocks(struct clk_mgr *clk_mgr_base,
}
if (!clk_mgr_base->clks.dtbclk_en && new_clocks->dtbclk_en) {
dcn35_smu_set_dtbclk(clk_mgr, true);
clk_mgr_base->clks.dtbclk_en = new_clocks->dtbclk_en;
int actual_dtbclk = 0;
dcn35_update_clocks_update_dtb_dto(clk_mgr, context, new_clocks->ref_dtbclk_khz);
clk_mgr_base->clks.ref_dtbclk_khz = new_clocks->ref_dtbclk_khz;
dcn35_smu_set_dtbclk(clk_mgr, true);
actual_dtbclk = REG_READ(CLK1_CLK4_CURRENT_CNT);
if (actual_dtbclk) {
clk_mgr_base->clks.ref_dtbclk_khz = new_clocks->ref_dtbclk_khz;
clk_mgr_base->clks.dtbclk_en = new_clocks->dtbclk_en;
}
}
/* check that we're not already in D0 */
@ -584,12 +591,10 @@ static bool dcn35_is_spll_ssc_enabled(struct clk_mgr *clk_mgr_base)
static void init_clk_states(struct clk_mgr *clk_mgr)
{
struct clk_mgr_internal *clk_mgr_int = TO_CLK_MGR_INTERNAL(clk_mgr);
uint32_t ref_dtbclk = clk_mgr->clks.ref_dtbclk_khz;
memset(&(clk_mgr->clks), 0, sizeof(struct dc_clocks));
if (clk_mgr_int->smu_ver >= SMU_VER_THRESHOLD)
clk_mgr->clks.dtbclk_en = true; // request DTBCLK disable on first commit
clk_mgr->clks.ref_dtbclk_khz = ref_dtbclk; // restore ref_dtbclk
clk_mgr->clks.p_state_change_support = true;
clk_mgr->clks.prev_p_state_change_support = true;
@ -600,6 +605,7 @@ static void init_clk_states(struct clk_mgr *clk_mgr)
void dcn35_init_clocks(struct clk_mgr *clk_mgr)
{
struct clk_mgr_internal *clk_mgr_int = TO_CLK_MGR_INTERNAL(clk_mgr);
init_clk_states(clk_mgr);
// to adjust dp_dto reference clock if ssc is enable otherwise to apply dprefclk