[PATCH 0/3] Hook up DC to legacy_dpm

[PATCH 0/3] Hook up DC to legacy_dpm

[Timur Kristóf]

Hook up DC to legacy DPM. Now SI and KV DPM are aware of power
management related requirements that come from DC, which is
necessary for DC to function correctly on these chips when DPM
is enabled.

Based on the "SI power management fixes (v2)" series.

Background:
The power management code (DPM) needs to be aware of requirements
from the display engine in order to select power states that are
compatible with the display engine being able to interact with the
currently connected displays.
On chips that rely on legacy_dpm (SI and KV), the DPM was not aware
of any requirements from DC because it used a different struct and
was not able to handle the information coming from DC.

Timur Kristóf (3):
  drm/amd/display: Add pixel_clock to amd_pp_display_configuration
  drm/amd/pm: Use pm_display_cfg in legacy DPM
  drm/amd/pm: Remove unneeded legacy DPM related code.

 drivers/gpu/drm/amd/amdgpu/amdgpu.h           |  1 -
 drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c  |  1 -
 .../amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c  |  1 +
 .../dc/clk_mgr/dce110/dce110_clk_mgr.c        |  2 +-
 .../drm/amd/display/dc/dm_services_types.h    |  2 +-
 drivers/gpu/drm/amd/include/dm_pp_interface.h |  1 +
 drivers/gpu/drm/amd/pm/amdgpu_dpm_internal.c  | 87 +++++++++----------
 drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h       |  4 -
 .../gpu/drm/amd/pm/inc/amdgpu_dpm_internal.h  |  6 +-
 drivers/gpu/drm/amd/pm/legacy-dpm/kv_dpm.c    |  4 +-
 .../gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c    |  9 +-
 drivers/gpu/drm/amd/pm/legacy-dpm/si_dpm.c    | 64 ++++----------
 .../gpu/drm/amd/pm/powerplay/amd_powerplay.c  | 11 +--
 13 files changed, 70 insertions(+), 123 deletions(-)

-- 
2.50.1

[PATCH 1/3] drm/amd/display: Add pixel_clock to amd_pp_display_configuration

[Timur Kristóf]

This commit adds the pixel_clock field to the display config
struct so that power management (DPM) can use it.

We currently don't have a proper bandwidth calculation on old
GPUs with DCE 6-10 because dce_calcs only supports DCE 11+.
So the power management (DPM) on these GPUs may need to make
ad-hoc decisions for display based on the pixel clock.

Also rename sym_clock to pixel_clock in dm_pp_single_disp_config
to avoid confusion with other code where the sym_clock refers to
the DisplayPort symbol clock.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c       | 1 +
 drivers/gpu/drm/amd/display/dc/clk_mgr/dce110/dce110_clk_mgr.c | 2 +-
 drivers/gpu/drm/amd/display/dc/dm_services_types.h             | 2 +-
 drivers/gpu/drm/amd/include/dm_pp_interface.h                  | 1 +
 4 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c
index e5771f490f2e..11b2ea6edf95 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c
@@ -98,6 +98,7 @@ bool dm_pp_apply_display_requirements(
 			const struct dm_pp_single_disp_config *dc_cfg =
 						&pp_display_cfg->disp_configs[i];
 			adev->pm.pm_display_cfg.displays[i].controller_id = dc_cfg->pipe_idx + 1;
+			adev->pm.pm_display_cfg.displays[i].pixel_clock = dc_cfg->pixel_clock;
 		}
 
 		amdgpu_dpm_display_configuration_change(adev, &adev->pm.pm_display_cfg);
diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dce110/dce110_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dce110/dce110_clk_mgr.c
index 13cf415e38e5..d50b9440210e 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dce110/dce110_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dce110/dce110_clk_mgr.c
@@ -164,7 +164,7 @@ void dce110_fill_display_configs(
 			stream->link->cur_link_settings.link_rate;
 		cfg->link_settings.link_spread =
 			stream->link->cur_link_settings.link_spread;
-		cfg->sym_clock = stream->phy_pix_clk;
+		cfg->pixel_clock = stream->phy_pix_clk;
 		/* Round v_refresh*/
 		cfg->v_refresh = stream->timing.pix_clk_100hz * 100;
 		cfg->v_refresh /= stream->timing.h_total;
diff --git a/drivers/gpu/drm/amd/display/dc/dm_services_types.h b/drivers/gpu/drm/amd/display/dc/dm_services_types.h
index bf63da266a18..3b093b8699ab 100644
--- a/drivers/gpu/drm/amd/display/dc/dm_services_types.h
+++ b/drivers/gpu/drm/amd/display/dc/dm_services_types.h
@@ -127,7 +127,7 @@ struct dm_pp_single_disp_config {
 	uint32_t src_height;
 	uint32_t src_width;
 	uint32_t v_refresh;
-	uint32_t sym_clock; /* HDMI only */
+	uint32_t pixel_clock; /* Pixel clock in KHz (for HDMI only: normalized) */
 	struct dc_link_settings link_settings; /* DP only */
 };
 
diff --git a/drivers/gpu/drm/amd/include/dm_pp_interface.h b/drivers/gpu/drm/amd/include/dm_pp_interface.h
index acd1cef61b7c..349544504c93 100644
--- a/drivers/gpu/drm/amd/include/dm_pp_interface.h
+++ b/drivers/gpu/drm/amd/include/dm_pp_interface.h
@@ -65,6 +65,7 @@ struct single_display_configuration {
 	uint32_t view_resolution_cy;
 	enum amd_pp_display_config_type displayconfigtype;
 	uint32_t vertical_refresh; /* for active display */
+	uint32_t pixel_clock; /* Pixel clock in KHz (for HDMI only: normalized) */
 };
 
 #define MAX_NUM_DISPLAY 32
-- 
2.50.1

[PATCH 2/3] drm/amd/pm: Use pm_display_cfg in legacy DPM

[Timur Kristóf]

This commit is necessary for DC to function well with chips
that use the legacy power management code, ie. SI and KV.
Communicate display information from DC to the legacy PM code.

Currently DC uses pm_display_cfg to communicate power management
requirements from the display code to the DPM code.
However, the legacy (non-DC) code path used different fields
and therefore could not take into account anything from DC.

Change the legacy display code to fill the same pm_display_cfg
struct as DC and use the same in the legacy DPM code.

To ease review and reduce churn, this commit does not yet
delete the now unneeded code, that is done in the next commit.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
---
 drivers/gpu/drm/amd/pm/amdgpu_dpm_internal.c  | 67 +++++++++++++++++++
 .../gpu/drm/amd/pm/inc/amdgpu_dpm_internal.h  |  2 +
 drivers/gpu/drm/amd/pm/legacy-dpm/kv_dpm.c    |  4 +-
 .../gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c    |  6 +-
 drivers/gpu/drm/amd/pm/legacy-dpm/si_dpm.c    | 64 ++++++------------
 .../gpu/drm/amd/pm/powerplay/amd_powerplay.c  | 11 +--
 6 files changed, 94 insertions(+), 60 deletions(-)

diff --git a/drivers/gpu/drm/amd/pm/amdgpu_dpm_internal.c b/drivers/gpu/drm/amd/pm/amdgpu_dpm_internal.c
index 2d2d2d5e6763..9ef965e4a92e 100644
--- a/drivers/gpu/drm/amd/pm/amdgpu_dpm_internal.c
+++ b/drivers/gpu/drm/amd/pm/amdgpu_dpm_internal.c
@@ -100,3 +100,70 @@ u32 amdgpu_dpm_get_vrefresh(struct amdgpu_device *adev)
 
 	return vrefresh;
 }
+
+void amdgpu_dpm_get_display_cfg(struct amdgpu_device *adev)
+{
+	struct drm_device *ddev = adev_to_drm(adev);
+	struct amd_pp_display_configuration *cfg = &adev->pm.pm_display_cfg;
+	struct single_display_configuration *display_cfg;
+	struct drm_crtc *crtc;
+	struct amdgpu_crtc *amdgpu_crtc;
+	struct amdgpu_connector *conn;
+	int num_crtcs = 0;
+	int vrefresh;
+	u32 vblank_in_pixels, vblank_time_us;
+
+	cfg->min_vblank_time = 0xffffffff; /* if the displays are off, vblank time is max */
+
+	if (adev->mode_info.num_crtc && adev->mode_info.mode_config_initialized) {
+		list_for_each_entry(crtc, &ddev->mode_config.crtc_list, head) {
+			amdgpu_crtc = to_amdgpu_crtc(crtc);
+
+			/* The array should only contain active displays. */
+			if (!amdgpu_crtc->enabled)
+				continue;
+
+			conn = to_amdgpu_connector(amdgpu_crtc->connector);
+			display_cfg = &adev->pm.pm_display_cfg.displays[num_crtcs++];
+
+			if (amdgpu_crtc->hw_mode.clock) {
+				vrefresh = drm_mode_vrefresh(&amdgpu_crtc->hw_mode);
+
+				vblank_in_pixels =
+					amdgpu_crtc->hw_mode.crtc_htotal *
+					(amdgpu_crtc->hw_mode.crtc_vblank_end -
+					amdgpu_crtc->hw_mode.crtc_vdisplay +
+					(amdgpu_crtc->v_border * 2));
+
+				vblank_time_us =
+					vblank_in_pixels * 1000 / amdgpu_crtc->hw_mode.clock;
+
+				/* The legacy (non-DC) code has issues with mclk switching
+				 * with refresh rates over 120 Hz. Disable mclk switching.
+				 */
+				if (vrefresh > 120)
+					vblank_time_us = 0;
+
+				/* Find minimum vblank time. */
+				if (vblank_time_us < cfg->min_vblank_time)
+					cfg->min_vblank_time = vblank_time_us;
+
+				/* Find vertical refresh rate of first active display. */
+				if (!cfg->vrefresh)
+					cfg->vrefresh = vrefresh;
+			}
+
+			if (amdgpu_crtc->crtc_id < cfg->crtc_index) {
+				/* Find first active CRTC and its line time. */
+				cfg->crtc_index = amdgpu_crtc->crtc_id;
+				cfg->line_time_in_us = amdgpu_crtc->line_time;
+			}
+
+			display_cfg->controller_id = amdgpu_crtc->crtc_id;
+			display_cfg->pixel_clock = conn->pixelclock_for_modeset;
+		}
+	}
+
+	cfg->display_clk = adev->clock.default_dispclk;
+	cfg->num_display = num_crtcs;
+}
diff --git a/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm_internal.h b/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm_internal.h
index 5c2a89f0d5d5..8be11510cd92 100644
--- a/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm_internal.h
+++ b/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm_internal.h
@@ -29,4 +29,6 @@ u32 amdgpu_dpm_get_vblank_time(struct amdgpu_device *adev);
 
 u32 amdgpu_dpm_get_vrefresh(struct amdgpu_device *adev);
 
+void amdgpu_dpm_get_display_cfg(struct amdgpu_device *adev);
+
 #endif
diff --git a/drivers/gpu/drm/amd/pm/legacy-dpm/kv_dpm.c b/drivers/gpu/drm/amd/pm/legacy-dpm/kv_dpm.c
index 307ebf7e3226..33eb85dd68e9 100644
--- a/drivers/gpu/drm/amd/pm/legacy-dpm/kv_dpm.c
+++ b/drivers/gpu/drm/amd/pm/legacy-dpm/kv_dpm.c
@@ -2299,7 +2299,7 @@ static void kv_apply_state_adjust_rules(struct amdgpu_device *adev,
 
 		if (pi->sys_info.nb_dpm_enable) {
 			force_high = (mclk >= pi->sys_info.nbp_memory_clock[3]) ||
-				pi->video_start || (adev->pm.dpm.new_active_crtc_count >= 3) ||
+				pi->video_start || (adev->pm.pm_display_cfg.num_display >= 3) ||
 				pi->disable_nb_ps3_in_battery;
 			ps->dpm0_pg_nb_ps_lo = force_high ? 0x2 : 0x3;
 			ps->dpm0_pg_nb_ps_hi = 0x2;
@@ -2358,7 +2358,7 @@ static int kv_calculate_nbps_level_settings(struct amdgpu_device *adev)
 			return 0;
 
 		force_high = ((mclk >= pi->sys_info.nbp_memory_clock[3]) ||
-			      (adev->pm.dpm.new_active_crtc_count >= 3) || pi->video_start);
+			      (adev->pm.pm_display_cfg.num_display >= 3) || pi->video_start);
 
 		if (force_high) {
 			for (i = pi->lowest_valid; i <= pi->highest_valid; i++)
diff --git a/drivers/gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c b/drivers/gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c
index ea3ace882a10..3a5da3ff4d00 100644
--- a/drivers/gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c
+++ b/drivers/gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c
@@ -771,8 +771,7 @@ static struct amdgpu_ps *amdgpu_dpm_pick_power_state(struct amdgpu_device *adev,
 	int i;
 	struct amdgpu_ps *ps;
 	u32 ui_class;
-	bool single_display = (adev->pm.dpm.new_active_crtc_count < 2) ?
-		true : false;
+	bool single_display = !!adev->pm.pm_display_cfg.num_display;
 
 	/* check if the vblank period is too short to adjust the mclk */
 	if (single_display && adev->powerplay.pp_funcs->vblank_too_short) {
@@ -968,7 +967,8 @@ void amdgpu_legacy_dpm_compute_clocks(void *handle)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
-	amdgpu_dpm_get_active_displays(adev);
+	if (!adev->dc_enabled)
+		amdgpu_dpm_get_display_cfg(adev);
 
 	amdgpu_dpm_change_power_state_locked(adev);
 }
diff --git a/drivers/gpu/drm/amd/pm/legacy-dpm/si_dpm.c b/drivers/gpu/drm/amd/pm/legacy-dpm/si_dpm.c
index 3fe6fa564e71..f9a22c2faf6a 100644
--- a/drivers/gpu/drm/amd/pm/legacy-dpm/si_dpm.c
+++ b/drivers/gpu/drm/amd/pm/legacy-dpm/si_dpm.c
@@ -3081,7 +3081,7 @@ static int si_get_vce_clock_voltage(struct amdgpu_device *adev,
 static bool si_dpm_vblank_too_short(void *handle)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
-	u32 vblank_time = amdgpu_dpm_get_vblank_time(adev);
+	u32 vblank_time = adev->pm.pm_display_cfg.min_vblank_time;
 	/* we never hit the non-gddr5 limit so disable it (but treat 0 as too short) */
 	u32 switch_limit = adev->gmc.vram_type == AMDGPU_VRAM_TYPE_GDDR5 ? 450 : 1;
 
@@ -3441,9 +3441,10 @@ static void rv770_get_engine_memory_ss(struct amdgpu_device *adev)
 static void si_apply_state_adjust_rules(struct amdgpu_device *adev,
 					struct amdgpu_ps *rps)
 {
+	const struct amd_pp_display_configuration *display_cfg =
+		&adev->pm.pm_display_cfg;
 	struct  si_ps *ps = si_get_ps(rps);
 	struct amdgpu_clock_and_voltage_limits *max_limits;
-	struct amdgpu_connector *conn;
 	bool disable_mclk_switching = false;
 	bool disable_sclk_switching = false;
 	u32 mclk, sclk;
@@ -3482,14 +3483,9 @@ static void si_apply_state_adjust_rules(struct amdgpu_device *adev,
 	 * For example, 4K 60Hz and 1080p 144Hz fall into this category.
 	 * Find number of such displays connected.
 	 */
-	for (i = 0; i < adev->mode_info.num_crtc; i++) {
-		if (!(adev->pm.dpm.new_active_crtcs & (1 << i)) ||
-			!adev->mode_info.crtcs[i]->enabled)
-			continue;
-
-		conn = to_amdgpu_connector(adev->mode_info.crtcs[i]->connector);
-
-		if (conn->pixelclock_for_modeset > 297000)
+	for (i = 0; i < display_cfg->num_display; i++) {
+		/* The array only contains active displays. */
+		if (display_cfg->displays[i].pixel_clock > 297000)
 			high_pixelclock_count++;
 	}
 
@@ -3524,7 +3520,7 @@ static void si_apply_state_adjust_rules(struct amdgpu_device *adev,
 		rps->ecclk = 0;
 	}
 
-	if ((adev->pm.dpm.new_active_crtc_count > 1) ||
+	if ((adev->pm.pm_display_cfg.num_display > 1) ||
 	    si_dpm_vblank_too_short(adev))
 		disable_mclk_switching = true;
 
@@ -3672,7 +3668,7 @@ static void si_apply_state_adjust_rules(struct amdgpu_device *adev,
 						   ps->performance_levels[i].mclk,
 						   max_limits->vddc,  &ps->performance_levels[i].vddc);
 		btc_apply_voltage_dependency_rules(&adev->pm.dpm.dyn_state.vddc_dependency_on_dispclk,
-						   adev->clock.current_dispclk,
+						   display_cfg->display_clk,
 						   max_limits->vddc,  &ps->performance_levels[i].vddc);
 	}
 
@@ -4197,16 +4193,16 @@ static void si_program_ds_registers(struct amdgpu_device *adev)
 
 static void si_program_display_gap(struct amdgpu_device *adev)
 {
+	const struct amd_pp_display_configuration *cfg = &adev->pm.pm_display_cfg;
 	u32 tmp, pipe;
-	int i;
 
 	tmp = RREG32(mmCG_DISPLAY_GAP_CNTL) & ~(CG_DISPLAY_GAP_CNTL__DISP1_GAP_MASK | CG_DISPLAY_GAP_CNTL__DISP2_GAP_MASK);
-	if (adev->pm.dpm.new_active_crtc_count > 0)
+	if (cfg->num_display > 0)
 		tmp |= R600_PM_DISPLAY_GAP_VBLANK_OR_WM << CG_DISPLAY_GAP_CNTL__DISP1_GAP__SHIFT;
 	else
 		tmp |= R600_PM_DISPLAY_GAP_IGNORE << CG_DISPLAY_GAP_CNTL__DISP1_GAP__SHIFT;
 
-	if (adev->pm.dpm.new_active_crtc_count > 1)
+	if (cfg->num_display > 1)
 		tmp |= R600_PM_DISPLAY_GAP_VBLANK_OR_WM << CG_DISPLAY_GAP_CNTL__DISP2_GAP__SHIFT;
 	else
 		tmp |= R600_PM_DISPLAY_GAP_IGNORE << CG_DISPLAY_GAP_CNTL__DISP2_GAP__SHIFT;
@@ -4216,17 +4212,8 @@ static void si_program_display_gap(struct amdgpu_device *adev)
 	tmp = RREG32(DCCG_DISP_SLOW_SELECT_REG);
 	pipe = (tmp & DCCG_DISP1_SLOW_SELECT_MASK) >> DCCG_DISP1_SLOW_SELECT_SHIFT;
 
-	if ((adev->pm.dpm.new_active_crtc_count > 0) &&
-	    (!(adev->pm.dpm.new_active_crtcs & (1 << pipe)))) {
-		/* find the first active crtc */
-		for (i = 0; i < adev->mode_info.num_crtc; i++) {
-			if (adev->pm.dpm.new_active_crtcs & (1 << i))
-				break;
-		}
-		if (i == adev->mode_info.num_crtc)
-			pipe = 0;
-		else
-			pipe = i;
+	if (cfg->num_display > 0 && pipe != cfg->crtc_index) {
+		pipe = cfg->crtc_index;
 
 		tmp &= ~DCCG_DISP1_SLOW_SELECT_MASK;
 		tmp |= DCCG_DISP1_SLOW_SELECT(pipe);
@@ -4237,7 +4224,7 @@ static void si_program_display_gap(struct amdgpu_device *adev)
 	 * This can be a problem on PowerXpress systems or if you want to use the card
 	 * for offscreen rendering or compute if there are no crtcs enabled.
 	 */
-	si_notify_smc_display_change(adev, adev->pm.dpm.new_active_crtc_count > 0);
+	si_notify_smc_display_change(adev, cfg->num_display > 0);
 }
 
 static void si_enable_spread_spectrum(struct amdgpu_device *adev, bool enable)
@@ -5546,7 +5533,7 @@ static int si_convert_power_level_to_smc(struct amdgpu_device *adev,
 	    (pl->mclk <= pi->mclk_stutter_mode_threshold) &&
 	    !eg_pi->uvd_enabled &&
 	    (RREG32(mmDPG_PIPE_STUTTER_CONTROL) & DPG_PIPE_STUTTER_CONTROL__STUTTER_ENABLE_MASK) &&
-	    (adev->pm.dpm.new_active_crtc_count <= 2)) {
+	    (adev->pm.pm_display_cfg.num_display <= 2)) {
 		level->mcFlags |= SISLANDS_SMC_MC_STUTTER_EN;
 	}
 
@@ -5702,7 +5689,7 @@ static bool si_is_state_ulv_compatible(struct amdgpu_device *adev,
 	/* XXX validate against display requirements! */
 
 	for (i = 0; i < adev->pm.dpm.dyn_state.vddc_dependency_on_dispclk.count; i++) {
-		if (adev->clock.current_dispclk <=
+		if (adev->pm.pm_display_cfg.display_clk <=
 		    adev->pm.dpm.dyn_state.vddc_dependency_on_dispclk.entries[i].clk) {
 			if (ulv->pl.vddc <
 			    adev->pm.dpm.dyn_state.vddc_dependency_on_dispclk.entries[i].v)
@@ -5856,24 +5843,11 @@ static int si_upload_ulv_state(struct amdgpu_device *adev)
 
 static int si_upload_smc_data(struct amdgpu_device *adev)
 {
-	struct amdgpu_crtc *amdgpu_crtc = NULL;
-	int i;
-
-	if (adev->pm.dpm.new_active_crtc_count == 0)
-		return 0;
-
-	for (i = 0; i < adev->mode_info.num_crtc; i++) {
-		if (adev->pm.dpm.new_active_crtcs & (1 << i)) {
-			amdgpu_crtc = adev->mode_info.crtcs[i];
-			break;
-		}
-	}
-
-	if (amdgpu_crtc == NULL)
+	if (adev->pm.pm_display_cfg.num_display == 0)
 		return 0;
 
-	int first_crtc_id = amdgpu_crtc->crtc_id;
-	int first_crtc_line_time = amdgpu_crtc->line_time;
+	int first_crtc_id = adev->pm.pm_display_cfg.crtc_index;
+	int first_crtc_line_time = adev->pm.pm_display_cfg.line_time_in_us;
 
 	if (first_crtc_line_time <= 0)
 		return 0;
diff --git a/drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c b/drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c
index b48a031cbba0..554492dfa3c0 100644
--- a/drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c
+++ b/drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c
@@ -1554,16 +1554,7 @@ static void pp_pm_compute_clocks(void *handle)
 	struct amdgpu_device *adev = hwmgr->adev;
 
 	if (!adev->dc_enabled) {
-		amdgpu_dpm_get_active_displays(adev);
-		adev->pm.pm_display_cfg.num_display = adev->pm.dpm.new_active_crtc_count;
-		adev->pm.pm_display_cfg.vrefresh = amdgpu_dpm_get_vrefresh(adev);
-		adev->pm.pm_display_cfg.min_vblank_time = amdgpu_dpm_get_vblank_time(adev);
-		/* we have issues with mclk switching with
-		 * refresh rates over 120 hz on the non-DC code.
-		 */
-		if (adev->pm.pm_display_cfg.vrefresh > 120)
-			adev->pm.pm_display_cfg.min_vblank_time = 0;
-
+		amdgpu_dpm_get_display_cfg(adev);
 		pp_display_configuration_change(handle,
 						&adev->pm.pm_display_cfg);
 	}
-- 
2.50.1

[PATCH 3/3] drm/amd/pm: Remove unneeded legacy DPM related code.

[Timur Kristóf]

This code isn't needed anymore as we collect the same information
into pm_display_cfg instead.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu.h           |  1 -
 drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c  |  1 -
 drivers/gpu/drm/amd/pm/amdgpu_dpm_internal.c  | 74 -------------------
 drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h       |  4 -
 .../gpu/drm/amd/pm/inc/amdgpu_dpm_internal.h  |  6 --
 .../gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c    |  3 -
 6 files changed, 89 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index ddd472e56f69..6c28fbbb574d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -434,7 +434,6 @@ struct amdgpu_clock {
 	uint32_t default_mclk;
 	uint32_t default_sclk;
 	uint32_t default_dispclk;
-	uint32_t current_dispclk;
 	uint32_t dp_extclk;
 	uint32_t max_pixel_clock;
 };
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
index e476e45b996a..a549d2ffc91f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
@@ -706,7 +706,6 @@ int amdgpu_atombios_get_clock_info(struct amdgpu_device *adev)
 		}
 		adev->clock.dp_extclk =
 			le16_to_cpu(firmware_info->info_21.usUniphyDPModeExtClkFreq);
-		adev->clock.current_dispclk = adev->clock.default_dispclk;
 
 		adev->clock.max_pixel_clock = le16_to_cpu(firmware_info->info.usMaxPixelClock);
 		if (adev->clock.max_pixel_clock == 0)
diff --git a/drivers/gpu/drm/amd/pm/amdgpu_dpm_internal.c b/drivers/gpu/drm/amd/pm/amdgpu_dpm_internal.c
index 9ef965e4a92e..b5e9c3ecf703 100644
--- a/drivers/gpu/drm/amd/pm/amdgpu_dpm_internal.c
+++ b/drivers/gpu/drm/amd/pm/amdgpu_dpm_internal.c
@@ -27,80 +27,6 @@
 #include "amdgpu_smu.h"
 #include "amdgpu_dpm_internal.h"
 
-void amdgpu_dpm_get_active_displays(struct amdgpu_device *adev)
-{
-	struct drm_device *ddev = adev_to_drm(adev);
-	struct drm_crtc *crtc;
-	struct amdgpu_crtc *amdgpu_crtc;
-
-	adev->pm.dpm.new_active_crtcs = 0;
-	adev->pm.dpm.new_active_crtc_count = 0;
-	if (adev->mode_info.num_crtc && adev->mode_info.mode_config_initialized) {
-		list_for_each_entry(crtc,
-				    &ddev->mode_config.crtc_list, head) {
-			amdgpu_crtc = to_amdgpu_crtc(crtc);
-			if (amdgpu_crtc->enabled) {
-				adev->pm.dpm.new_active_crtcs |= (1 << amdgpu_crtc->crtc_id);
-				adev->pm.dpm.new_active_crtc_count++;
-			}
-		}
-	}
-}
-
-u32 amdgpu_dpm_get_vblank_time(struct amdgpu_device *adev)
-{
-	struct drm_device *dev = adev_to_drm(adev);
-	struct drm_crtc *crtc;
-	struct amdgpu_crtc *amdgpu_crtc;
-	u32 vblank_in_pixels;
-	u32 vblank_time_us = 0xffffffff; /* if the displays are off, vblank time is max */
-
-	if (adev->mode_info.num_crtc && adev->mode_info.mode_config_initialized) {
-		list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
-			amdgpu_crtc = to_amdgpu_crtc(crtc);
-			if (crtc->enabled && amdgpu_crtc->enabled && amdgpu_crtc->hw_mode.clock) {
-				vblank_in_pixels =
-					amdgpu_crtc->hw_mode.crtc_htotal *
-					(amdgpu_crtc->hw_mode.crtc_vblank_end -
-					amdgpu_crtc->hw_mode.crtc_vdisplay +
-					(amdgpu_crtc->v_border * 2));
-
-				vblank_time_us = vblank_in_pixels * 1000 / amdgpu_crtc->hw_mode.clock;
-
-				/* we have issues with mclk switching with
-				 * refresh rates over 120 hz on the non-DC code.
-				 */
-				if (drm_mode_vrefresh(&amdgpu_crtc->hw_mode) > 120)
-					vblank_time_us = 0;
-
-				break;
-			}
-		}
-	}
-
-	return vblank_time_us;
-}
-
-u32 amdgpu_dpm_get_vrefresh(struct amdgpu_device *adev)
-{
-	struct drm_device *dev = adev_to_drm(adev);
-	struct drm_crtc *crtc;
-	struct amdgpu_crtc *amdgpu_crtc;
-	u32 vrefresh = 0;
-
-	if (adev->mode_info.num_crtc && adev->mode_info.mode_config_initialized) {
-		list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
-			amdgpu_crtc = to_amdgpu_crtc(crtc);
-			if (crtc->enabled && amdgpu_crtc->enabled && amdgpu_crtc->hw_mode.clock) {
-				vrefresh = drm_mode_vrefresh(&amdgpu_crtc->hw_mode);
-				break;
-			}
-		}
-	}
-
-	return vrefresh;
-}
-
 void amdgpu_dpm_get_display_cfg(struct amdgpu_device *adev)
 {
 	struct drm_device *ddev = adev_to_drm(adev);
diff --git a/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h b/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h
index 9748744133d9..65c1d98af26c 100644
--- a/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h
+++ b/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h
@@ -263,10 +263,6 @@ struct amdgpu_dpm {
 	u32                     voltage_response_time;
 	u32                     backbias_response_time;
 	void                    *priv;
-	u32			new_active_crtcs;
-	int			new_active_crtc_count;
-	u32			current_active_crtcs;
-	int			current_active_crtc_count;
 	struct amdgpu_dpm_dynamic_state dyn_state;
 	struct amdgpu_dpm_fan fan;
 	u32 tdp_limit;
diff --git a/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm_internal.h b/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm_internal.h
index 8be11510cd92..cc6d7ba040e9 100644
--- a/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm_internal.h
+++ b/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm_internal.h
@@ -23,12 +23,6 @@
 #ifndef __AMDGPU_DPM_INTERNAL_H__
 #define __AMDGPU_DPM_INTERNAL_H__
 
-void amdgpu_dpm_get_active_displays(struct amdgpu_device *adev);
-
-u32 amdgpu_dpm_get_vblank_time(struct amdgpu_device *adev);
-
-u32 amdgpu_dpm_get_vrefresh(struct amdgpu_device *adev);
-
 void amdgpu_dpm_get_display_cfg(struct amdgpu_device *adev);
 
 #endif
diff --git a/drivers/gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c b/drivers/gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c
index 3a5da3ff4d00..9e3b60b9ef28 100644
--- a/drivers/gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c
+++ b/drivers/gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c
@@ -944,9 +944,6 @@ static int amdgpu_dpm_change_power_state_locked(struct amdgpu_device *adev)
 
 	amdgpu_dpm_post_set_power_state(adev);
 
-	adev->pm.dpm.current_active_crtcs = adev->pm.dpm.new_active_crtcs;
-	adev->pm.dpm.current_active_crtc_count = adev->pm.dpm.new_active_crtc_count;
-
 	if (pp_funcs->force_performance_level) {
 		if (adev->pm.dpm.thermal_active) {
 			enum amd_dpm_forced_level level = adev->pm.dpm.forced_level;
-- 
2.50.1

Re: [PATCH 1/3] drm/amd/display: Add pixel_clock to amd_pp_display_configuration

[Alex Deucher]

On Mon, Aug 25, 2025 at 6:07 PM Timur Kristóf <timur.kristof@gmail.com> wrote:
>
> This commit adds the pixel_clock field to the display config
> struct so that power management (DPM) can use it.
>
> We currently don't have a proper bandwidth calculation on old
> GPUs with DCE 6-10 because dce_calcs only supports DCE 11+.
> So the power management (DPM) on these GPUs may need to make
> ad-hoc decisions for display based on the pixel clock.
>
> Also rename sym_clock to pixel_clock in dm_pp_single_disp_config
> to avoid confusion with other code where the sym_clock refers to
> the DisplayPort symbol clock.
>
> Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
> ---
>  drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c       | 1 +
>  drivers/gpu/drm/amd/display/dc/clk_mgr/dce110/dce110_clk_mgr.c | 2 +-
>  drivers/gpu/drm/amd/display/dc/dm_services_types.h             | 2 +-
>  drivers/gpu/drm/amd/include/dm_pp_interface.h                  | 1 +
>  4 files changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c
> index e5771f490f2e..11b2ea6edf95 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c
> @@ -98,6 +98,7 @@ bool dm_pp_apply_display_requirements(
>                         const struct dm_pp_single_disp_config *dc_cfg =
>                                                 &pp_display_cfg->disp_configs[i];
>                         adev->pm.pm_display_cfg.displays[i].controller_id = dc_cfg->pipe_idx + 1;
> +                       adev->pm.pm_display_cfg.displays[i].pixel_clock = dc_cfg->pixel_clock;
>                 }
>
>                 amdgpu_dpm_display_configuration_change(adev, &adev->pm.pm_display_cfg);
> diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dce110/dce110_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dce110/dce110_clk_mgr.c
> index 13cf415e38e5..d50b9440210e 100644
> --- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dce110/dce110_clk_mgr.c
> +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dce110/dce110_clk_mgr.c
> @@ -164,7 +164,7 @@ void dce110_fill_display_configs(
>                         stream->link->cur_link_settings.link_rate;
>                 cfg->link_settings.link_spread =
>                         stream->link->cur_link_settings.link_spread;
> -               cfg->sym_clock = stream->phy_pix_clk;
> +               cfg->pixel_clock = stream->phy_pix_clk;
>                 /* Round v_refresh*/
>                 cfg->v_refresh = stream->timing.pix_clk_100hz * 100;
>                 cfg->v_refresh /= stream->timing.h_total;
> diff --git a/drivers/gpu/drm/amd/display/dc/dm_services_types.h b/drivers/gpu/drm/amd/display/dc/dm_services_types.h
> index bf63da266a18..3b093b8699ab 100644
> --- a/drivers/gpu/drm/amd/display/dc/dm_services_types.h
> +++ b/drivers/gpu/drm/amd/display/dc/dm_services_types.h
> @@ -127,7 +127,7 @@ struct dm_pp_single_disp_config {
>         uint32_t src_height;
>         uint32_t src_width;
>         uint32_t v_refresh;
> -       uint32_t sym_clock; /* HDMI only */
> +       uint32_t pixel_clock; /* Pixel clock in KHz (for HDMI only: normalized) */

This one could probably stay sym_clock to avoid the extra churn, but
either way is fine with me.  Series is:
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>


>         struct dc_link_settings link_settings; /* DP only */
>  };
>
> diff --git a/drivers/gpu/drm/amd/include/dm_pp_interface.h b/drivers/gpu/drm/amd/include/dm_pp_interface.h
> index acd1cef61b7c..349544504c93 100644
> --- a/drivers/gpu/drm/amd/include/dm_pp_interface.h
> +++ b/drivers/gpu/drm/amd/include/dm_pp_interface.h
> @@ -65,6 +65,7 @@ struct single_display_configuration {
>         uint32_t view_resolution_cy;
>         enum amd_pp_display_config_type displayconfigtype;
>         uint32_t vertical_refresh; /* for active display */
> +       uint32_t pixel_clock; /* Pixel clock in KHz (for HDMI only: normalized) */
>  };
>
>  #define MAX_NUM_DISPLAY 32
> --
> 2.50.1
>

[PATCH 3/3] drm/amd/pm: Remove unneeded legacy DPM related code.

[Timur Kristóf]

This code isn't needed anymore as we collect the same information
into pm_display_cfg instead.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu.h           |  1 -
 drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c  |  1 -
 drivers/gpu/drm/amd/pm/amdgpu_dpm_internal.c  | 74 -------------------
 drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h       |  4 -
 .../gpu/drm/amd/pm/inc/amdgpu_dpm_internal.h  |  6 --
 .../gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c    |  3 -
 6 files changed, 89 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 17848ce65d1f..07bb6ca48359 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -434,7 +434,6 @@ struct amdgpu_clock {
 	uint32_t default_mclk;
 	uint32_t default_sclk;
 	uint32_t default_dispclk;
-	uint32_t current_dispclk;
 	uint32_t dp_extclk;
 	uint32_t max_pixel_clock;
 };
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
index 9dfdc08cc887..763f2b8dcf13 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
@@ -706,7 +706,6 @@ int amdgpu_atombios_get_clock_info(struct amdgpu_device *adev)
 		}
 		adev->clock.dp_extclk =
 			le16_to_cpu(firmware_info->info_21.usUniphyDPModeExtClkFreq);
-		adev->clock.current_dispclk = adev->clock.default_dispclk;
 
 		adev->clock.max_pixel_clock = le16_to_cpu(firmware_info->info.usMaxPixelClock);
 		if (adev->clock.max_pixel_clock == 0)
diff --git a/drivers/gpu/drm/amd/pm/amdgpu_dpm_internal.c b/drivers/gpu/drm/amd/pm/amdgpu_dpm_internal.c
index 9ef965e4a92e..b5e9c3ecf703 100644
--- a/drivers/gpu/drm/amd/pm/amdgpu_dpm_internal.c
+++ b/drivers/gpu/drm/amd/pm/amdgpu_dpm_internal.c
@@ -27,80 +27,6 @@
 #include "amdgpu_smu.h"
 #include "amdgpu_dpm_internal.h"
 
-void amdgpu_dpm_get_active_displays(struct amdgpu_device *adev)
-{
-	struct drm_device *ddev = adev_to_drm(adev);
-	struct drm_crtc *crtc;
-	struct amdgpu_crtc *amdgpu_crtc;
-
-	adev->pm.dpm.new_active_crtcs = 0;
-	adev->pm.dpm.new_active_crtc_count = 0;
-	if (adev->mode_info.num_crtc && adev->mode_info.mode_config_initialized) {
-		list_for_each_entry(crtc,
-				    &ddev->mode_config.crtc_list, head) {
-			amdgpu_crtc = to_amdgpu_crtc(crtc);
-			if (amdgpu_crtc->enabled) {
-				adev->pm.dpm.new_active_crtcs |= (1 << amdgpu_crtc->crtc_id);
-				adev->pm.dpm.new_active_crtc_count++;
-			}
-		}
-	}
-}
-
-u32 amdgpu_dpm_get_vblank_time(struct amdgpu_device *adev)
-{
-	struct drm_device *dev = adev_to_drm(adev);
-	struct drm_crtc *crtc;
-	struct amdgpu_crtc *amdgpu_crtc;
-	u32 vblank_in_pixels;
-	u32 vblank_time_us = 0xffffffff; /* if the displays are off, vblank time is max */
-
-	if (adev->mode_info.num_crtc && adev->mode_info.mode_config_initialized) {
-		list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
-			amdgpu_crtc = to_amdgpu_crtc(crtc);
-			if (crtc->enabled && amdgpu_crtc->enabled && amdgpu_crtc->hw_mode.clock) {
-				vblank_in_pixels =
-					amdgpu_crtc->hw_mode.crtc_htotal *
-					(amdgpu_crtc->hw_mode.crtc_vblank_end -
-					amdgpu_crtc->hw_mode.crtc_vdisplay +
-					(amdgpu_crtc->v_border * 2));
-
-				vblank_time_us = vblank_in_pixels * 1000 / amdgpu_crtc->hw_mode.clock;
-
-				/* we have issues with mclk switching with
-				 * refresh rates over 120 hz on the non-DC code.
-				 */
-				if (drm_mode_vrefresh(&amdgpu_crtc->hw_mode) > 120)
-					vblank_time_us = 0;
-
-				break;
-			}
-		}
-	}
-
-	return vblank_time_us;
-}
-
-u32 amdgpu_dpm_get_vrefresh(struct amdgpu_device *adev)
-{
-	struct drm_device *dev = adev_to_drm(adev);
-	struct drm_crtc *crtc;
-	struct amdgpu_crtc *amdgpu_crtc;
-	u32 vrefresh = 0;
-
-	if (adev->mode_info.num_crtc && adev->mode_info.mode_config_initialized) {
-		list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
-			amdgpu_crtc = to_amdgpu_crtc(crtc);
-			if (crtc->enabled && amdgpu_crtc->enabled && amdgpu_crtc->hw_mode.clock) {
-				vrefresh = drm_mode_vrefresh(&amdgpu_crtc->hw_mode);
-				break;
-			}
-		}
-	}
-
-	return vrefresh;
-}
-
 void amdgpu_dpm_get_display_cfg(struct amdgpu_device *adev)
 {
 	struct drm_device *ddev = adev_to_drm(adev);
diff --git a/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h b/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h
index 9748744133d9..65c1d98af26c 100644
--- a/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h
+++ b/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h
@@ -263,10 +263,6 @@ struct amdgpu_dpm {
 	u32                     voltage_response_time;
 	u32                     backbias_response_time;
 	void                    *priv;
-	u32			new_active_crtcs;
-	int			new_active_crtc_count;
-	u32			current_active_crtcs;
-	int			current_active_crtc_count;
 	struct amdgpu_dpm_dynamic_state dyn_state;
 	struct amdgpu_dpm_fan fan;
 	u32 tdp_limit;
diff --git a/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm_internal.h b/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm_internal.h
index 8be11510cd92..cc6d7ba040e9 100644
--- a/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm_internal.h
+++ b/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm_internal.h
@@ -23,12 +23,6 @@
 #ifndef __AMDGPU_DPM_INTERNAL_H__
 #define __AMDGPU_DPM_INTERNAL_H__
 
-void amdgpu_dpm_get_active_displays(struct amdgpu_device *adev);
-
-u32 amdgpu_dpm_get_vblank_time(struct amdgpu_device *adev);
-
-u32 amdgpu_dpm_get_vrefresh(struct amdgpu_device *adev);
-
 void amdgpu_dpm_get_display_cfg(struct amdgpu_device *adev);
 
 #endif
diff --git a/drivers/gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c b/drivers/gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c
index 6ebe3d0f5b87..c7ed0b457129 100644
--- a/drivers/gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c
+++ b/drivers/gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c
@@ -944,9 +944,6 @@ static int amdgpu_dpm_change_power_state_locked(struct amdgpu_device *adev)
 
 	amdgpu_dpm_post_set_power_state(adev);
 
-	adev->pm.dpm.current_active_crtcs = adev->pm.dpm.new_active_crtcs;
-	adev->pm.dpm.current_active_crtc_count = adev->pm.dpm.new_active_crtc_count;
-
 	if (pp_funcs->force_performance_level) {
 		if (adev->pm.dpm.thermal_active) {
 			enum amd_dpm_forced_level level = adev->pm.dpm.forced_level;
-- 
2.51.0