The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

Possible dependencies:

c7943bb324e5 ("drm/edid: Handle EDID 1.4 range descriptor h/vfreq offsets") 45aa2336fa6d ("drm/edid: convert drm_for_each_detailed_block() to drm_edid") 2c54f87cf2fb ("drm/edid: convert get_monitor_name() to drm_edid") 874d98eed71a ("drm/edid: convert mode_in_range() and drm_monitor_supports_rb() to drm_edid") 67d87fac86dd ("drm/edid: convert drm_mode_std() and children to drm_edid") 7428bfbdb7c4 ("drm/edid: convert drm_cvt_modes_for_range() to drm_edid") a77f7c89e62c ("drm/edid: convert drm_gtf_modes_for_range() to drm_edid") 084c7a7c7a0a ("drm/edid: convert drm_dmt_modes_for_range() to drm_edid") dd0f4470a849 ("drm/edid: convert struct detailed_mode_closure to drm_edid") 40f71f5b2392 ("drm/edid: convert drm_edid_connector_update() to drm_edid fully") a2f9790dcffe ("drm/edid: propagate drm_edid to drm_edid_to_eld()") e42192b4c345 ("drm/edid: keep propagating drm_edid to display info") ab1747ccf052 ("drm/edid: convert drm_for_each_detailed_block() to edid iter") 6ff1c19f5f28 ("drm/edid: sunset drm_find_cea_extension()") 58304630b830 ("drm/edid: skip CTA extension scan in drm_edid_to_eld() just for CTA rev") 8db73897698c ("drm/edid: detect color formats and CTA revision in all CTA extensions") 37852141965d ("drm/edid: convert drm_edid_to_eld() to use cea db iter") dfc031259656 ("drm/edid: convert drm_parse_cea_ext() to use cea db iter") 537d9ed2f6c1 ("drm/edid: convert add_cea_modes() to use cea db iter") 9d72b7e2d2ce ("drm/edid: clean up CTA data block tag definitions")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From c7943bb324e503baeeba3df2bc5ca8a377111bfa Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= ville.syrjala@linux.intel.com Date: Sat, 27 Aug 2022 00:34:51 +0300 Subject: [PATCH] drm/edid: Handle EDID 1.4 range descriptor h/vfreq offsets MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit

EDID 1.4 introduced some extra flags in the range descriptor to support min/max h/vfreq >= 255. Consult them to correctly parse the vfreq limits.

Note that some combinations of the flags are documented as "reserved" (as are some other values in the descriptor) but explicitly checking for those doesn't seem particularly worthwile since we end up with bogus results whether we decode them or not.

v2: Increase the storage to u16 to make it work (Jani) Note the "reserved" values situation (Jani) v3: Document the EDID version number in the defines Drop some bogus (u8) casts

Cc: stable@vger.kernel.org Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/6519 References: https://gitlab.freedesktop.org/drm/intel/-/issues/6484 Reviewed-by: Jani Nikula jani.nikula@intel.com Signed-off-by: Ville Syrjälä ville.syrjala@linux.intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20220826213501.31490-2-ville.s... Reviewed-by: Manasi Navare manasi.d.navare@intel.com

diff --git a/drivers/gpu/drm/drm_debugfs.c b/drivers/gpu/drm/drm_debugfs.c index 493922069c90..01ee3febb813 100644 --- a/drivers/gpu/drm/drm_debugfs.c +++ b/drivers/gpu/drm/drm_debugfs.c @@ -377,8 +377,8 @@ static int vrr_range_show(struct seq_file *m, void *data) if (connector->status != connector_status_connected) return -ENODEV;

- seq_printf(m, "Min: %u\n", (u8)connector->display_info.monitor_range.min_vfreq); - seq_printf(m, "Max: %u\n", (u8)connector->display_info.monitor_range.max_vfreq); + seq_printf(m, "Min: %u\n", connector->display_info.monitor_range.min_vfreq); + seq_printf(m, "Max: %u\n", connector->display_info.monitor_range.max_vfreq);

return 0; } diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index bbc25e3b7220..eaa819381281 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -5971,12 +5971,14 @@ static void drm_parse_cea_ext(struct drm_connector *connector, }

static -void get_monitor_range(const struct detailed_timing *timing, - void *info_monitor_range) +void get_monitor_range(const struct detailed_timing *timing, void *c) { - struct drm_monitor_range_info *monitor_range = info_monitor_range; + struct detailed_mode_closure *closure = c; + struct drm_display_info *info = &closure->connector->display_info; + 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; + const struct edid *edid = closure->drm_edid->edid;

if (!is_display_descriptor(timing, EDID_DETAIL_MONITOR_RANGE)) return; @@ -5992,18 +5994,28 @@ void get_monitor_range(const struct detailed_timing *timing,

monitor_range->min_vfreq = range->min_vfreq; monitor_range->max_vfreq = range->max_vfreq; + + if (edid->revision >= 4) { + if (data->pad2 & DRM_EDID_RANGE_OFFSET_MIN_VFREQ) + monitor_range->min_vfreq += 255; + if (data->pad2 & DRM_EDID_RANGE_OFFSET_MAX_VFREQ) + monitor_range->max_vfreq += 255; + } }

static void drm_get_monitor_range(struct drm_connector *connector, const struct drm_edid *drm_edid) { - struct drm_display_info *info = &connector->display_info; + const struct drm_display_info *info = &connector->display_info; + struct detailed_mode_closure closure = { + .connector = connector, + .drm_edid = drm_edid, + };

if (!version_greater(drm_edid, 1, 1)) return;

- drm_for_each_detailed_block(drm_edid, get_monitor_range, - &info->monitor_range); + drm_for_each_detailed_block(drm_edid, get_monitor_range, &closure);

DRM_DEBUG_KMS("Supported Monitor Refresh rate range is %d Hz - %d Hz\n", info->monitor_range.min_vfreq, diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index a1705d6b3fba..7df7876b2ad5 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -319,8 +319,8 @@ enum drm_panel_orientation { * EDID's detailed monitor range */ struct drm_monitor_range_info { - u8 min_vfreq; - u8 max_vfreq; + u16 min_vfreq; + u16 max_vfreq; };

/** diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h index 2181977ae683..1ed61e2b30a4 100644 --- a/include/drm/drm_edid.h +++ b/include/drm/drm_edid.h @@ -92,6 +92,11 @@ struct detailed_data_string { u8 str[13]; } __attribute__((packed));

+#define DRM_EDID_RANGE_OFFSET_MIN_VFREQ (1 << 0) /* 1.4 */ +#define DRM_EDID_RANGE_OFFSET_MAX_VFREQ (1 << 1) /* 1.4 */ +#define DRM_EDID_RANGE_OFFSET_MIN_HFREQ (1 << 2) /* 1.4 */ +#define DRM_EDID_RANGE_OFFSET_MAX_HFREQ (1 << 3) /* 1.4 */ + #define DRM_EDID_DEFAULT_GTF_SUPPORT_FLAG 0x00 #define DRM_EDID_RANGE_LIMITS_ONLY_FLAG 0x01 #define DRM_EDID_SECONDARY_GTF_SUPPORT_FLAG 0x02