[PATCH 14/25] drm/i915/slpc: Notification of Display mode change

tom.orourke
2016-04-06T19:24:57Z

From: Sagar Arun Kamble <sagar.a.kamble@intel.com>

GuC SLPC need to be sent data related to Active pipes, refresh rates,
widi pipes, fullscreen pipes related via host to GuC display mode
change event. Based on this, SLPC will track FPS on active pipes.
This patch defines the event and implements trigger of the event.

v2: Addressed review comments from Paulo and Ville. Changed the way
display mode information is collected in intel_atomic_commit. Coupled
display mode change event with SLPC enable/reset event. Updated inactive
crtc state in display mode data. Updated refresh rate and vsync_ft_usec
calculations to get more accurate value. (Paulo)
v2(torourke): Updates suggested by Paulo: replace HAS_SLPC with
intel_slpc_active. return void instead of ignored error code.

Signed-off-by: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Signed-off-by: Tom O'Rourke <Tom.O'Rourke@intel.com>
---
drivers/gpu/drm/i915/intel_display.c | 2 +
drivers/gpu/drm/i915/intel_slpc.c | 142 ++++++++++++++++++++++++++++++++++-
drivers/gpu/drm/i915/intel_slpc.h | 3 +
3 files changed, 146 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index cb2d6af..90f2809 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -13639,6 +13639,8 @@ static int intel_atomic_commit(struct drm_device *dev,
if (hw_check)
intel_modeset_check_state(dev, state);

+ intel_slpc_update_atomic_commit_info(dev, state);
+
drm_atomic_state_free(state);

/* As one of the primary mmio accessors, KMS has a high likelihood
diff --git a/drivers/gpu/drm/i915/intel_slpc.c b/drivers/gpu/drm/i915/intel_slpc.c
index 97b2163..f476670 100644
--- a/drivers/gpu/drm/i915/intel_slpc.c
+++ b/drivers/gpu/drm/i915/intel_slpc.c
@@ -73,6 +73,21 @@ static void host2guc_slpc_shutdown(struct drm_device *dev)
host2guc_slpc(dev_priv, data, 4);
}

+static void host2guc_slpc_display_mode_change(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ u32 data[7];
+ int i;
+
+ data[0] = HOST2GUC_ACTION_SLPC_REQUEST;
+ data[1] = SLPC_EVENT(SLPC_EVENT_DISPLAY_MODE_CHANGE, SLPC_MAX_NUM_OF_PIPES + 1);
+ data[2] = dev_priv->guc.slpc.display_mode_params.global_data;
+ for(i = 0; i < SLPC_MAX_NUM_OF_PIPES; ++i)
+ data[3+i] = dev_priv->guc.slpc.display_mode_params.per_pipe_info[i].data;
+
+ host2guc_slpc(dev_priv, data, 7);
+}
+
static u8 slpc_get_platform_sku(struct drm_i915_gem_object *obj)
{
struct drm_device *dev = obj->base.dev;
@@ -181,8 +196,10 @@ void intel_slpc_disable(struct drm_device *dev)

void intel_slpc_enable(struct drm_device *dev)
{
- if (intel_slpc_active(dev))
+ if (intel_slpc_active(dev)) {
host2guc_slpc_reset(dev);
+ intel_slpc_update_display_mode_info(dev);
+ }
}

void intel_slpc_reset(struct drm_device *dev)
@@ -192,3 +209,126 @@ void intel_slpc_reset(struct drm_device *dev)
host2guc_slpc_reset(dev);
}
}
+
+void intel_slpc_update_display_mode_info(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct intel_crtc *intel_crtc;
+ struct intel_display_pipe_info *per_pipe_info;
+ struct intel_slpc_display_mode_event_params *cur_params, old_params;
+ bool notify = false;
+
+ if (!intel_slpc_active(dev))
+ return;
+
+ /* Copy display mode parameters for comparison */
+ cur_params = &dev_priv->guc.slpc.display_mode_params;
+ old_params.global_data = cur_params->global_data;
+ cur_params->global_data = 0;
+
+ intel_runtime_pm_get(dev_priv);
+ drm_modeset_lock_all(dev);
+
+ for_each_intel_crtc(dev, intel_crtc) {
+ per_pipe_info = &cur_params->per_pipe_info[intel_crtc->pipe];
+ old_params.per_pipe_info[intel_crtc->pipe].data = per_pipe_info->data;
+ per_pipe_info->data = 0;
+
+ if (intel_crtc->active) {
+ struct drm_display_mode *mode = &intel_crtc->base.mode;
+ /* FIXME: Update is_widi based on encoder */
+ per_pipe_info->is_widi = 0;
+ per_pipe_info->refresh_rate =
+ (mode->clock * 1000)/ (mode->htotal * mode->vtotal);
+ if (!per_pipe_info->refresh_rate) {
+ DRM_ERROR("Invalid mode refresh rate\n");
+ drm_modeset_unlock_all(dev);
+ intel_runtime_pm_put(dev_priv);
+ return;
+ }
+ per_pipe_info->vsync_ft_usec =
+ (mode->htotal * mode->vtotal * 1000) / mode->clock;
+ cur_params->active_pipes_bitmask |= (1 << intel_crtc->pipe);
+ cur_params->vbi_sync_on_pipes |= (1 << intel_crtc->pipe);
+ } else {
+ cur_params->active_pipes_bitmask &= (0 << intel_crtc->pipe);
+ cur_params->vbi_sync_on_pipes &= (0 << intel_crtc->pipe);
+ }
+
+ if (old_params.per_pipe_info[intel_crtc->pipe].data != per_pipe_info->data)
+ notify = true;
+ }
+
+ drm_modeset_unlock_all(dev);
+
+ cur_params->num_active_pipes = hweight32(cur_params->active_pipes_bitmask);
+
+ /* Compare old display mode with current mode. Notify SLPC if it is changed. */
+ if (cur_params->global_data != old_params.global_data)
+ notify = true;
+
+ if (notify) {
+ host2guc_slpc_display_mode_change(dev);
+ }
+
+ intel_runtime_pm_put(dev_priv);
+}
+
+void intel_slpc_update_atomic_commit_info(struct drm_device *dev,
+ struct drm_atomic_state *state)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct drm_crtc *crtc;
+ struct drm_crtc_state *crtc_state;
+ struct intel_display_pipe_info *per_pipe_info;
+ struct intel_slpc_display_mode_event_params *cur_params, old_params;
+ bool notify = false;
+ int i;
+
+ if (!intel_slpc_active(dev))
+ return;
+
+ /* Copy display mode parameters for comparison */
+ cur_params = &dev_priv->guc.slpc.display_mode_params;
+ old_params.global_data = cur_params->global_data;
+
+ for_each_crtc_in_state(state, crtc, crtc_state, i) {
+ struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+
+ per_pipe_info = &cur_params->per_pipe_info[intel_crtc->pipe];
+ old_params.per_pipe_info[intel_crtc->pipe].data = per_pipe_info->data;
+
+ per_pipe_info->data = 0;
+ cur_params->active_pipes_bitmask &= (0 << intel_crtc->pipe);
+ cur_params->vbi_sync_on_pipes &= (0 << intel_crtc->pipe);
+
+ if (crtc_state->active) {
+ struct drm_display_mode *mode = &crtc->mode;
+ /* FIXME: Update is_widi based on encoder */
+ per_pipe_info->is_widi = 0;
+ per_pipe_info->refresh_rate =
+ (mode->clock * 1000)/ (mode->htotal * mode->vtotal);
+ if (!per_pipe_info->refresh_rate) {
+ DRM_ERROR("Invalid mode refresh rate\n");
+ return;
+ }
+ per_pipe_info->vsync_ft_usec =
+ (mode->htotal * mode->vtotal * 1000) / mode->clock;
+ cur_params->active_pipes_bitmask |= (1 << intel_crtc->pipe);
+ cur_params->vbi_sync_on_pipes |= (1 << intel_crtc->pipe);
+ }
+
+ if (old_params.per_pipe_info[intel_crtc->pipe].data != per_pipe_info->data)
+ notify = true;
+ }
+
+ cur_params->num_active_pipes = hweight32(cur_params->active_pipes_bitmask);
+
+ /* Compare old display mode with current mode. Notify SLPC if it is changed. */
+ if (cur_params->global_data != old_params.global_data)
+ notify = true;
+
+ if (notify) {
+ host2guc_slpc_display_mode_change(dev);
+ }
+}
diff --git a/drivers/gpu/drm/i915/intel_slpc.h b/drivers/gpu/drm/i915/intel_slpc.h
index b963fe7..d560d86 100644
--- a/drivers/gpu/drm/i915/intel_slpc.h
+++ b/drivers/gpu/drm/i915/intel_slpc.h
@@ -149,5 +149,8 @@ void intel_slpc_suspend(struct drm_device *dev);
void intel_slpc_disable(struct drm_device *dev);
void intel_slpc_enable(struct drm_device *dev);
void intel_slpc_reset(struct drm_device *dev);
+void intel_slpc_update_display_mode_info(struct drm_device *dev);
+void intel_slpc_update_atomic_commit_info(struct drm_device *dev,
+ struct drm_atomic_state *state);

#endif