torvalds/linux
torvalds/linux
2
0
Fork 0
mirror of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-09-04 20:19:47 +08:00
Code

drm/amd/display: Add clock control callbacks

Browse Source 
[why & how]
Add clock source selection an control functions based on spec

Reviewed-by: Muhammad Ahmed <ahmed.ahmed@amd.com>
Signed-off-by: Hansen Dsouza <Hansen.Dsouza@amd.com>
Signed-off-by: Wayne Lin <wayne.lin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Hansen Dsouza 2024-07-25 11:45:36 -04:00 committed by Alex Deucher
parent be64336307
commit 78c508a1c1
1 changed files with 252 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

281
drivers/gpu/drm/amd/display/dc/dccg/dcn35/dcn35_dccg.c
View File

@ -41,13 +41,22 @@
#define DC_LOGGER \ #define DC_LOGGER \
dccg->ctx->logger dccg->ctx->logger
enum physymclk_fe_source { enum symclk_fe_source {
PHYSYMCLK_FE_SYMCLK_A = 0, // Select functional clock from backend symclk A SYMCLK_FE_SYMCLK_A = 0, // Select functional clock from backend symclk A
PHYSYMCLK_FE_SYMCLK_B, SYMCLK_FE_SYMCLK_B,
PHYSYMCLK_FE_SYMCLK_C, SYMCLK_FE_SYMCLK_C,
PHYSYMCLK_FE_SYMCLK_D, SYMCLK_FE_SYMCLK_D,
PHYSYMCLK_FE_SYMCLK_E, SYMCLK_FE_SYMCLK_E,
PHYSYMCLK_FE_REFCLK = 0xFF, // Arbitrary value to pass refclk selection in software SYMCLK_FE_REFCLK = 0xFF, // Arbitrary value to pass refclk selection in software
};
enum symclk_be_source {
SYMCLK_BE_PHYCLK = 0, // Select phy clk when sym_clk_enable = 1
SYMCLK_BE_DPIACLK_810 = 4,
SYMCLK_BE_DPIACLK_162 = 5,
SYMCLK_BE_DPIACLK_540 = 6,
SYMCLK_BE_DPIACLK_270 = 7,
SYMCLK_BE_REFCLK = 0xFF, // Arbitrary value to pass refclk selection in software
}; };
enum physymclk_source { enum physymclk_source {
@ -252,7 +261,7 @@ static void dccg35_set_physymclk_rcg(
} }
} }
static void dccg35_set_physymclk_fe_rcg( static void dccg35_set_symclk_fe_rcg(
struct dccg *dccg, struct dccg *dccg,
int inst, int inst,
bool enable) bool enable)
@ -289,6 +298,45 @@ static void dccg35_set_physymclk_fe_rcg(
} }
} }
static void dccg35_set_symclk_be_rcg(
struct dccg *dccg,
int inst,
bool enable)
{
struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg);
/* TBD add symclk_be in rcg control bits */
if (!dccg->ctx->dc->debug.root_clock_optimization.bits.physymclk)
return;
switch (inst) {
case 0:
REG_UPDATE(DCCG_GATE_DISABLE_CNTL5,
SYMCLKA_ROOT_GATE_DISABLE, enable ? 0 : 1);
break;
case 1:
REG_UPDATE(DCCG_GATE_DISABLE_CNTL5,
SYMCLKB_ROOT_GATE_DISABLE, enable ? 0 : 1);
break;
case 2:
REG_UPDATE(DCCG_GATE_DISABLE_CNTL5,
SYMCLKC_ROOT_GATE_DISABLE, enable ? 0 : 1);
break;
case 3:
REG_UPDATE(DCCG_GATE_DISABLE_CNTL5,
SYMCLKD_ROOT_GATE_DISABLE, enable ? 0 : 1);
break;
case 4:
REG_UPDATE(DCCG_GATE_DISABLE_CNTL5,
SYMCLKE_ROOT_GATE_DISABLE, enable ? 0 : 1);
break;
default:
BREAK_TO_DEBUGGER();
return;
}
}
static void dccg35_set_dtbclk_p_rcg(struct dccg *dccg, int inst, bool enable) static void dccg35_set_dtbclk_p_rcg(struct dccg *dccg, int inst, bool enable)
{ {
@ -665,6 +713,42 @@ static void dccg35_set_physymclk_src_new(
} }
} }
static void dccg35_set_symclk_be_src_new(
struct dccg *dccg,
enum symclk_be_source src,
int inst)
{
struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg);
switch (inst) {
case 0:
REG_UPDATE_2(SYMCLKA_CLOCK_ENABLE,
SYMCLKA_CLOCK_ENABLE, (src == SYMCLK_BE_REFCLK) ? 0 : 1,
SYMCLKA_SRC_SEL, (src == SYMCLK_BE_REFCLK) ? 0 : src);
break;
case 1:
REG_UPDATE_2(SYMCLKB_CLOCK_ENABLE,
SYMCLKB_CLOCK_ENABLE, (src == SYMCLK_BE_REFCLK) ? 0 : 1,
SYMCLKB_SRC_SEL, (src == SYMCLK_BE_REFCLK) ? 0 : src);
break;
case 2:
REG_UPDATE_2(SYMCLKC_CLOCK_ENABLE,
SYMCLKC_CLOCK_ENABLE, (src == SYMCLK_BE_REFCLK) ? 0 : 1,
SYMCLKC_SRC_SEL, (src == SYMCLK_BE_REFCLK) ? 0 : src);
break;
case 3:
REG_UPDATE_2(SYMCLKD_CLOCK_ENABLE,
SYMCLKD_CLOCK_ENABLE, (src == SYMCLK_BE_REFCLK) ? 0 : 1,
SYMCLKD_SRC_SEL, (src == SYMCLK_BE_REFCLK) ? 0 : src);
break;
case 4:
REG_UPDATE_2(SYMCLKE_CLOCK_ENABLE,
SYMCLKE_CLOCK_ENABLE, (src == SYMCLK_BE_REFCLK) ? 0 : 1,
SYMCLKE_SRC_SEL, (src == SYMCLK_BE_REFCLK) ? 0 : src);
break;
}
}
static int dccg35_is_symclk_fe_src_functional_be(struct dccg *dccg, static int dccg35_is_symclk_fe_src_functional_be(struct dccg *dccg,
int symclk_fe_inst, int symclk_fe_inst,
int symclk_be_inst) int symclk_be_inst)
@ -699,35 +783,35 @@ static int dccg35_is_symclk_fe_src_functional_be(struct dccg *dccg,
return 0; return 0;
} }
static void dccg35_set_symclk_fe_src_new(struct dccg *dccg, enum physymclk_fe_source src, int inst) static void dccg35_set_symclk_fe_src_new(struct dccg *dccg, enum symclk_fe_source src, int inst)
{ {
struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg); struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg);
switch (inst) { switch (inst) {
case 0: case 0:
REG_UPDATE_2(SYMCLKA_CLOCK_ENABLE, REG_UPDATE_2(SYMCLKA_CLOCK_ENABLE,
SYMCLKA_FE_EN, (src == PHYSYMCLK_FE_REFCLK) ? 0 : 1, SYMCLKA_FE_EN, (src == SYMCLK_FE_REFCLK) ? 0 : 1,
SYMCLKA_FE_SRC_SEL, (src == PHYSYMCLK_FE_REFCLK) ? 0 : src); SYMCLKA_FE_SRC_SEL, (src == SYMCLK_FE_REFCLK) ? 0 : src);
break; break;
case 1: case 1:
REG_UPDATE_2(SYMCLKB_CLOCK_ENABLE, REG_UPDATE_2(SYMCLKB_CLOCK_ENABLE,
SYMCLKB_FE_EN, (src == PHYSYMCLK_FE_REFCLK) ? 0 : 1, SYMCLKB_FE_EN, (src == SYMCLK_FE_REFCLK) ? 0 : 1,
SYMCLKB_FE_SRC_SEL, (src == PHYSYMCLK_FE_REFCLK) ? 0 : src); SYMCLKB_FE_SRC_SEL, (src == SYMCLK_FE_REFCLK) ? 0 : src);
break; break;
case 2: case 2:
REG_UPDATE_2(SYMCLKC_CLOCK_ENABLE, REG_UPDATE_2(SYMCLKC_CLOCK_ENABLE,
SYMCLKC_FE_EN, (src == PHYSYMCLK_FE_REFCLK) ? 0 : 1, SYMCLKC_FE_EN, (src == SYMCLK_FE_REFCLK) ? 0 : 1,
SYMCLKC_FE_SRC_SEL, (src == PHYSYMCLK_FE_REFCLK) ? 0 : src); SYMCLKC_FE_SRC_SEL, (src == SYMCLK_FE_REFCLK) ? 0 : src);
break; break;
case 3: case 3:
REG_UPDATE_2(SYMCLKD_CLOCK_ENABLE, REG_UPDATE_2(SYMCLKD_CLOCK_ENABLE,
SYMCLKD_FE_EN, (src == PHYSYMCLK_FE_REFCLK) ? 0 : 1, SYMCLKD_FE_EN, (src == SYMCLK_FE_REFCLK) ? 0 : 1,
SYMCLKD_FE_SRC_SEL, (src == PHYSYMCLK_FE_REFCLK) ? 0 : src); SYMCLKD_FE_SRC_SEL, (src == SYMCLK_FE_REFCLK) ? 0 : src);
break; break;
case 4: case 4:
REG_UPDATE_2(SYMCLKE_CLOCK_ENABLE, REG_UPDATE_2(SYMCLKE_CLOCK_ENABLE,
SYMCLKE_FE_EN, (src == PHYSYMCLK_FE_REFCLK) ? 0 : 1, SYMCLKE_FE_EN, (src == SYMCLK_FE_REFCLK) ? 0 : 1,
SYMCLKE_FE_SRC_SEL, (src == PHYSYMCLK_FE_REFCLK) ? 0 : src); SYMCLKE_FE_SRC_SEL, (src == SYMCLK_FE_REFCLK) ? 0 : src);
break; break;
} }
} }
@ -804,9 +888,9 @@ static uint32_t dccg35_is_symclk32_se_rcg(struct dccg *dccg, int inst)
static void dccg35_enable_symclk_fe_new( static void dccg35_enable_symclk_fe_new(
struct dccg *dccg, struct dccg *dccg,
int inst, int inst,
enum physymclk_fe_source src) enum symclk_fe_source src)
{ {
dccg35_set_physymclk_fe_rcg(dccg, inst, false); dccg35_set_symclk_fe_rcg(dccg, inst, false);
dccg35_set_symclk_fe_src_new(dccg, src, inst); dccg35_set_symclk_fe_src_new(dccg, src, inst);
} }
@ -814,17 +898,17 @@ static void dccg35_disable_symclk_fe_new(
struct dccg *dccg, struct dccg *dccg,
int inst) int inst)
{ {
dccg35_set_symclk_fe_src_new(dccg, PHYSYMCLK_FE_REFCLK, inst); dccg35_set_symclk_fe_src_new(dccg, SYMCLK_FE_REFCLK, inst);
dccg35_set_physymclk_fe_rcg(dccg, inst, true); dccg35_set_symclk_fe_rcg(dccg, inst, true);
} }
static void dccg35_enable_symclk_be_new( static void dccg35_enable_symclk_be_new(
struct dccg *dccg, struct dccg *dccg,
int inst, int inst,
enum physymclk_source src) enum symclk_be_source src)
{ {
dccg35_set_physymclk_rcg(dccg, inst, false); dccg35_set_symclk_be_rcg(dccg, inst, false);
dccg35_set_physymclk_src_new(dccg, inst, src); dccg35_set_symclk_be_src_new(dccg, inst, src);
} }
static void dccg35_disable_symclk_be_new( static void dccg35_disable_symclk_be_new(
@ -834,7 +918,7 @@ static void dccg35_disable_symclk_be_new(
int i; int i;
/* Switch from functional clock to refclock */ /* Switch from functional clock to refclock */
dccg35_set_physymclk_src_new(dccg, inst, PHYSYMCLK_REFCLK); dccg35_set_symclk_be_src_new(dccg, inst, SYMCLK_BE_REFCLK);
/* Check if any other SE connected LE and disable them */ /* Check if any other SE connected LE and disable them */
for (i = 0; i < 4; i++) { for (i = 0; i < 4; i++) {
@ -845,7 +929,7 @@ static void dccg35_disable_symclk_be_new(
} }
} }
/* Safe to RCG SYMCLK*/ /* Safe to RCG SYMCLK*/
dccg35_set_physymclk_rcg(dccg, inst, true); dccg35_set_symclk_be_rcg(dccg, inst, true);
} }
static void dccg35_enable_symclk32_se_new( static void dccg35_enable_symclk32_se_new(
@ -2041,6 +2125,132 @@ static void dccg35_dpp_root_clock_control_cb(
dccg35_disable_dpp_clk_new(dccg, dpp_inst); dccg35_disable_dpp_clk_new(dccg, dpp_inst);
} }
static void dccg35_enable_symclk32_se_cb(
struct dccg *dccg,
int inst,
enum phyd32clk_clock_source phyd32clk)
{
dccg35_enable_symclk32_se_new(dccg, inst, (enum symclk32_se_clk_source)phyd32clk);
}
static void dccg35_disable_symclk32_se_cb(struct dccg *dccg, int inst)
{
dccg35_disable_symclk32_se_new(dccg, inst);
}
static void dccg35_disable_symclk32_le_cb(struct dccg *dccg, int inst)
{
dccg35_disable_symclk32_le_new(dccg, inst);
}
static void dccg35_set_symclk32_le_root_clock_gating(
struct dccg *dccg,
int inst,
bool power_on)
{
/* power_on set indicates we need to ungate
* Currently called from optimize_bandwidth and prepare_bandwidth calls
* Since clock source is not passed restore to refclock on ungate
* Redundant as gating when enabled is acheived through disable_symclk32_le
*/
if (power_on)
dccg35_enable_symclk32_le_new(dccg, inst, SYMCLK32_LE_REFCLK);
else
dccg35_disable_symclk32_le_new(dccg, inst);
}
static void dccg35_set_dtbclk_p_src_cb(
struct dccg *dccg,
enum streamclk_source src,
uint32_t inst)
{
if (src == DTBCLK0)
dccg35_enable_dtbclk_p_new(dccg, DTBCLK_DTBCLK0, inst);
else
dccg35_disable_dtbclk_p_new(dccg, inst);
}
static void dccg35_set_dtbclk_dto_cb(
struct dccg *dccg,
const struct dtbclk_dto_params *params)
{
/* set_dtbclk_p_src typ called earlier to switch to DTBCLK
* if params->ref_dtbclk_khz and req_dtbclk_khz are 0 switch to ref-clock
*/
struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg);
/* DTO Output Rate / Pixel Rate = 1/4 */
int req_dtbclk_khz = params->pixclk_khz / 4;
if (params->ref_dtbclk_khz && req_dtbclk_khz) {
uint32_t modulo, phase;
dccg35_enable_dtbclk_p_new(dccg, DTBCLK_DTBCLK0, params->otg_inst);
// phase / modulo = dtbclk / dtbclk ref
modulo = params->ref_dtbclk_khz * 1000;
phase = req_dtbclk_khz * 1000;
REG_WRITE(DTBCLK_DTO_MODULO[params->otg_inst], modulo);
REG_WRITE(DTBCLK_DTO_PHASE[params->otg_inst], phase);
REG_UPDATE(OTG_PIXEL_RATE_CNTL[params->otg_inst],
DTBCLK_DTO_ENABLE[params->otg_inst], 1);
REG_WAIT(OTG_PIXEL_RATE_CNTL[params->otg_inst],
DTBCLKDTO_ENABLE_STATUS[params->otg_inst], 1,
1, 100);
/* program OTG_PIXEL_RATE_DIV for DIVK1 and DIVK2 fields */
dccg35_set_pixel_rate_div(dccg, params->otg_inst, PIXEL_RATE_DIV_BY_1, PIXEL_RATE_DIV_BY_1);
/* The recommended programming sequence to enable DTBCLK DTO to generate
* valid pixel HPO DPSTREAM ENCODER, specifies that DTO source select should
* be set only after DTO is enabled
*/
REG_UPDATE(OTG_PIXEL_RATE_CNTL[params->otg_inst],
PIPE_DTO_SRC_SEL[params->otg_inst], 2);
} else {
dccg35_disable_dtbclk_p_new(dccg, params->otg_inst);
REG_UPDATE_2(OTG_PIXEL_RATE_CNTL[params->otg_inst],
DTBCLK_DTO_ENABLE[params->otg_inst], 0,
PIPE_DTO_SRC_SEL[params->otg_inst], params->is_hdmi ? 0 : 1);
REG_WRITE(DTBCLK_DTO_MODULO[params->otg_inst], 0);
REG_WRITE(DTBCLK_DTO_PHASE[params->otg_inst], 0);
}
}
static void dccg35_disable_dscclk_cb(struct dccg *dccg,
int inst)
{
dccg35_disable_dscclk_new(dccg, inst);
}
static void dccg35_enable_dscclk_cb(struct dccg *dccg, int inst)
{
dccg35_enable_dscclk_new(dccg, inst, DSC_DTO_TUNED_CK_GPU_DISCLK_3);
}
static void dccg35_enable_symclk_se_cb(struct dccg *dccg, uint32_t stream_enc_inst, uint32_t link_enc_inst)
{
/* Switch to functional clock if already not selected */
dccg35_enable_symclk_be_new(dccg, SYMCLK_BE_PHYCLK, link_enc_inst);
dccg35_enable_symclk_fe_new(dccg, stream_enc_inst, (enum symclk_fe_source) link_enc_inst);
}
static void dccg35_disable_symclk_se_cb(
struct dccg *dccg,
uint32_t stream_enc_inst,
uint32_t link_enc_inst)
{
dccg35_disable_symclk_fe_new(dccg, stream_enc_inst);
/* DMU PHY sequence switches SYMCLK_BE (link_enc_inst) to ref clock once PHY is turned off */
}
static const struct dccg_funcs dccg35_funcs = { static const struct dccg_funcs dccg35_funcs = {
.update_dpp_dto = dccg35_update_dpp_dto, .update_dpp_dto = dccg35_update_dpp_dto,
.dpp_root_clock_control = dccg35_dpp_root_clock_control, .dpp_root_clock_control = dccg35_dpp_root_clock_control,
@ -2070,6 +2280,7 @@ static const struct dccg_funcs dccg35_funcs = {
.enable_symclk_se = dccg35_enable_symclk_se, .enable_symclk_se = dccg35_enable_symclk_se,
.disable_symclk_se = dccg35_disable_symclk_se, .disable_symclk_se = dccg35_disable_symclk_se,
.set_dtbclk_p_src = dccg35_set_dtbclk_p_src, .set_dtbclk_p_src = dccg35_set_dtbclk_p_src,
}; };
struct dccg *dccg35_create( struct dccg *dccg35_create(
@ -2091,7 +2302,7 @@ struct dccg *dccg35_create(
(void)&dccg35_set_symclk32_se_rcg; (void)&dccg35_set_symclk32_se_rcg;
(void)&dccg35_set_symclk32_le_rcg; (void)&dccg35_set_symclk32_le_rcg;
(void)&dccg35_set_physymclk_rcg; (void)&dccg35_set_physymclk_rcg;
(void)&dccg35_set_physymclk_fe_rcg; (void)&dccg35_set_symclk_fe_rcg;
(void)&dccg35_set_dtbclk_p_rcg; (void)&dccg35_set_dtbclk_p_rcg;
(void)&dccg35_set_dppclk_rcg; (void)&dccg35_set_dppclk_rcg;
(void)&dccg35_set_dpstreamclk_rcg; (void)&dccg35_set_dpstreamclk_rcg;
@ -2129,6 +2340,18 @@ struct dccg *dccg35_create(
(void)&dccg35_set_dpstreamclk_root_clock_gating_cb; (void)&dccg35_set_dpstreamclk_root_clock_gating_cb;
(void)&dccg35_update_dpp_dto_cb; (void)&dccg35_update_dpp_dto_cb;
(void)&dccg35_dpp_root_clock_control_cb; (void)&dccg35_dpp_root_clock_control_cb;
(void)&dccg35_disable_symclk_se_cb;
(void)&dccg35_enable_symclk_se_cb;
(void)&dccg35_enable_dscclk_cb;
(void)&dccg35_disable_dscclk_cb;
(void)&dccg35_set_dtbclk_dto_cb;
(void)&dccg35_set_dtbclk_p_src_cb;
(void)&dccg35_set_symclk32_le_root_clock_gating;
(void)&dccg35_disable_symclk32_le_cb;
(void)&dccg35_set_symclk_be_src_new;
(void)&dccg35_set_symclk_be_rcg;
(void)&dccg35_enable_symclk32_se_cb;
(void)&dccg35_disable_symclk32_se_cb;
base = &dccg_dcn->base; base = &dccg_dcn->base;
base->ctx = ctx; base->ctx = ctx;