diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 34939441c73c..872433bbfc2f 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -5172,6 +5172,59 @@ static void dm_enable_per_frame_crtc_master_sync(struct dc_state *context) set_master_stream(context->streams, context->stream_count); } +static struct drm_display_mode * +get_highest_refresh_rate_mode(struct amdgpu_dm_connector *aconnector, + bool use_probed_modes) +{ + struct drm_display_mode *m, *m_pref = NULL; + u16 current_refresh, highest_refresh; + struct list_head *list_head = use_probed_modes ? + &aconnector->base.probed_modes : + &aconnector->base.modes; + + if (aconnector->freesync_vid_base.clock != 0) + return &aconnector->freesync_vid_base; + + /* Find the preferred mode */ + list_for_each_entry (m, list_head, head) { + if (m->type & DRM_MODE_TYPE_PREFERRED) { + m_pref = m; + break; + } + } + + if (!m_pref) { + /* Probably an EDID with no preferred mode. Fallback to first entry */ + m_pref = list_first_entry_or_null( + &aconnector->base.modes, struct drm_display_mode, head); + if (!m_pref) { + DRM_DEBUG_DRIVER("No preferred mode found in EDID\n"); + return NULL; + } + } + + highest_refresh = drm_mode_vrefresh(m_pref); + + /* + * Find the mode with highest refresh rate with same resolution. + * For some monitors, preferred mode is not the mode with highest + * supported refresh rate. + */ + list_for_each_entry (m, list_head, head) { + current_refresh = drm_mode_vrefresh(m); + + if (m->hdisplay == m_pref->hdisplay && + m->vdisplay == m_pref->vdisplay && + highest_refresh < current_refresh) { + highest_refresh = current_refresh; + m_pref = m; + } + } + + aconnector->freesync_vid_base = *m_pref; + return m_pref; +} + static struct dc_stream_state * create_stream_for_sink(struct amdgpu_dm_connector *aconnector, const struct drm_display_mode *drm_mode, @@ -6973,6 +7026,107 @@ static void amdgpu_dm_connector_ddc_get_modes(struct drm_connector *connector, } } +static bool is_duplicate_mode(struct amdgpu_dm_connector *aconnector, + struct drm_display_mode *mode) +{ + struct drm_display_mode *m; + + list_for_each_entry (m, &aconnector->base.probed_modes, head) { + if (drm_mode_equal(m, mode)) + return true; + } + + return false; +} + +static uint add_fs_modes(struct amdgpu_dm_connector *aconnector) +{ + const struct drm_display_mode *m; + struct drm_display_mode *new_mode; + uint i; + uint32_t new_modes_count = 0; + + /* Standard FPS values + * + * 23.976 - TV/NTSC + * 24 - Cinema + * 25 - TV/PAL + * 29.97 - TV/NTSC + * 30 - TV/NTSC + * 48 - Cinema HFR + * 50 - TV/PAL + * 60 - Commonly used + * 48,72,96 - Multiples of 24 + */ + const uint32_t common_rates[] = { 23976, 24000, 25000, 29970, 30000, + 48000, 50000, 60000, 72000, 96000 }; + + /* + * Find mode with highest refresh rate with the same resolution + * as the preferred mode. Some monitors report a preferred mode + * with lower resolution than the highest refresh rate supported. + */ + + m = get_highest_refresh_rate_mode(aconnector, true); + if (!m) + return 0; + + for (i = 0; i < ARRAY_SIZE(common_rates); i++) { + uint64_t target_vtotal, target_vtotal_diff; + uint64_t num, den; + + if (drm_mode_vrefresh(m) * 1000 < common_rates[i]) + continue; + + if (common_rates[i] < aconnector->min_vfreq * 1000 || + common_rates[i] > aconnector->max_vfreq * 1000) + continue; + + num = (unsigned long long)m->clock * 1000 * 1000; + den = common_rates[i] * (unsigned long long)m->htotal; + target_vtotal = div_u64(num, den); + target_vtotal_diff = target_vtotal - m->vtotal; + + /* Check for illegal modes */ + if (m->vsync_start + target_vtotal_diff < m->vdisplay || + m->vsync_end + target_vtotal_diff < m->vsync_start || + m->vtotal + target_vtotal_diff < m->vsync_end) + continue; + + new_mode = drm_mode_duplicate(aconnector->base.dev, m); + if (!new_mode) + goto out; + + new_mode->vtotal += (u16)target_vtotal_diff; + new_mode->vsync_start += (u16)target_vtotal_diff; + new_mode->vsync_end += (u16)target_vtotal_diff; + new_mode->type &= ~DRM_MODE_TYPE_PREFERRED; + new_mode->type |= DRM_MODE_TYPE_DRIVER; + + if (!is_duplicate_mode(aconnector, new_mode)) { + drm_mode_probed_add(&aconnector->base, new_mode); + new_modes_count += 1; + } else + drm_mode_destroy(aconnector->base.dev, new_mode); + } + out: + return new_modes_count; +} + +static void amdgpu_dm_connector_add_freesync_modes(struct drm_connector *connector, + struct edid *edid) +{ + struct amdgpu_dm_connector *amdgpu_dm_connector = + to_amdgpu_dm_connector(connector); + + if (!(amdgpu_freesync_vid_mode && edid)) + return; + + if (amdgpu_dm_connector->max_vfreq - amdgpu_dm_connector->min_vfreq > 10) + amdgpu_dm_connector->num_modes += + add_fs_modes(amdgpu_dm_connector); +} + static int amdgpu_dm_connector_get_modes(struct drm_connector *connector) { struct amdgpu_dm_connector *amdgpu_dm_connector = @@ -6988,6 +7142,7 @@ static int amdgpu_dm_connector_get_modes(struct drm_connector *connector) } else { amdgpu_dm_connector_ddc_get_modes(connector, edid); amdgpu_dm_connector_add_common_modes(encoder, connector); + amdgpu_dm_connector_add_freesync_modes(connector, edid); } amdgpu_dm_fbc_init(connector); diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h index bbf68cb6cfec..6792de32c98c 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h @@ -440,6 +440,8 @@ struct amdgpu_dm_connector { #endif bool force_yuv420_output; struct dsc_preferred_settings dsc_settings; + /* Cached display modes */ + struct drm_display_mode freesync_vid_base; }; #define to_amdgpu_dm_connector(x) container_of(x, struct amdgpu_dm_connector, base)