Adaptive Sync is a VESA feature so add a DRM core helper to parse the EDID's detailed descritors to obtain the adaptive sync monitor range. Store this info as part fo drm_display_info so it can be used across all drivers. This part of the code is stripped out of amdgpu's function amdgpu_dm_update_freesync_caps() to make it generic and be used across all DRM drivers

v6: * Call it monitor_range (Ville) v5: * Use the renamed flags v4: * Use is_display_descriptor() (Ville) * Name the monitor range flags (Ville) v3: * Remove the edid parsing restriction for just DP (Nicholas) * Use drm_for_each_detailed_block (Ville) * Make the drm_get_adaptive_sync_range function static (Harry, Jani) v2: * Change vmin and vmax to use u8 (Ville) * Dont store pixel clock since that is just a max dotclock and not related to VRR mode (Manasi)

Cc: Ville Syrjälä ville.syrjala@linux.intel.com Cc: Harry Wentland harry.wentland@amd.com Cc: Clinton A Taylor clinton.a.taylor@intel.com Cc: Kazlauskas Nicholas Nicholas.Kazlauskas@amd.com Signed-off-by: Manasi Navare manasi.d.navare@intel.com Reviewed-by: Nicholas Kazlauskas nicholas.kazlauskas@amd.com --- drivers/gpu/drm/drm_edid.c | 44 +++++++++++++++++++++++++++++++++++++ include/drm/drm_connector.h | 22 +++++++++++++++++++ 2 files changed, 66 insertions(+)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index ad41764a4ebe..b269cd7f7679 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -4938,6 +4938,47 @@ static void drm_parse_cea_ext(struct drm_connector *connector, } }

+static +void get_monitor_range(struct detailed_timing *timing, + void *info_monitor_range) +{ + struct drm_monitor_range_info *monitor_range = info_monitor_range; + const struct detailed_non_pixel *data = &timing->data.other_data; + const struct detailed_data_monitor_range *range = &data->data.range; + + if (!is_display_descriptor((const u8 *)timing, EDID_DETAIL_MONITOR_RANGE)) + return; + + /* + * Check for flag range limits only. If flag == 1 then + * no additional timing information provided. + * Default GTF, GTF Secondary curve and CVT are not + * supported + */ + if (range->flags != DRM_EDID_RANGE_LIMITS_ONLY_FLAG) + return; + + monitor_range->min_vfreq = range->min_vfreq; + monitor_range->max_vfreq = range->max_vfreq; +} + +static +void drm_get_monitor_range(struct drm_connector *connector, + const struct edid *edid) +{ + struct drm_display_info *info = &connector->display_info; + + if (!version_greater(edid, 1, 1)) + return; + + drm_for_each_detailed_block((u8 *)edid, get_monitor_range, + &info->monitor_range); + + DRM_DEBUG_KMS("Supported Monitor Refresh rate range is %d Hz - %d Hz\n", + info->monitor_range.min_vfreq, + info->monitor_range.max_vfreq); +} + /* A connector has no EDID information, so we've got no EDID to compute quirks from. Reset * all of the values which would have been set from EDID */ @@ -4960,6 +5001,7 @@ drm_reset_display_info(struct drm_connector *connector) memset(&info->hdmi, 0, sizeof(info->hdmi));

info->non_desktop = 0; + memset(&info->monitor_range, 0, sizeof(info->monitor_range)); }

u32 drm_add_display_info(struct drm_connector *connector, const struct edid *edid) @@ -4975,6 +5017,8 @@ u32 drm_add_display_info(struct drm_connector *connector, const struct edid *edi

info->non_desktop = !!(quirks & EDID_QUIRK_NON_DESKTOP);

+ drm_get_monitor_range(connector, edid); + DRM_DEBUG_KMS("non_desktop set to %d\n", info->non_desktop);

if (edid->revision < 3) diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index 0df7a95ca5d9..19ae6bb5c85b 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -254,6 +254,23 @@ enum drm_panel_orientation { DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, };

+/** + * struct drm_monitor_range_info - Panel's Monitor range in EDID for + * &drm_display_info + * + * This struct is used to store a frequency range supported by panel + * as parsed from EDID's detailed monitor range descriptor block. + * + * @min_vfreq: This is the min supported refresh rate in Hz from + * EDID's detailed monitor range. + * @max_vfreq: This is the max supported refresh rate in Hz from + * EDID's detailed monitor range + */ +struct drm_monitor_range_info { + u8 min_vfreq; + u8 max_vfreq; +}; + /* * This is a consolidated colorimetry list supported by HDMI and * DP protocol standard. The respective connectors will register @@ -473,6 +490,11 @@ struct drm_display_info { * @non_desktop: Non desktop display (HMD). */ bool non_desktop; + + /** + * @monitor_range: Frequency range supported by monitor range descriptor + */ + struct drm_monitor_range_info monitor_range; };

int drm_display_info_set_bus_formats(struct drm_display_info *info,