diff options
Diffstat (limited to 'drivers/gpu/drm/drm_edid.c')
| -rw-r--r-- | drivers/gpu/drm/drm_edid.c | 135 |
1 files changed, 131 insertions, 4 deletions
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 649cfd8b4200..d87f574feeca 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -27,16 +27,19 @@ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. */ -#include <linux/kernel.h> -#include <linux/slab.h> + #include <linux/hdmi.h> #include <linux/i2c.h> +#include <linux/kernel.h> #include <linux/module.h> +#include <linux/slab.h> #include <linux/vga_switcheroo.h> -#include <drm/drmP.h> + +#include <drm/drm_displayid.h> +#include <drm/drm_drv.h> #include <drm/drm_edid.h> #include <drm/drm_encoder.h> -#include <drm/drm_displayid.h> +#include <drm/drm_print.h> #include <drm/drm_scdc_helper.h> #include "drm_crtc_internal.h" @@ -2849,6 +2852,7 @@ add_detailed_modes(struct drm_connector *connector, struct edid *edid, #define VIDEO_BLOCK 0x02 #define VENDOR_BLOCK 0x03 #define SPEAKER_BLOCK 0x04 +#define HDR_STATIC_METADATA_BLOCK 0x6 #define USE_EXTENDED_TAG 0x07 #define EXT_VIDEO_CAPABILITY_BLOCK 0x00 #define EXT_VIDEO_DATA_BLOCK_420 0x0E @@ -3831,6 +3835,55 @@ static void fixup_detailed_cea_mode_clock(struct drm_display_mode *mode) mode->clock = clock; } +static bool cea_db_is_hdmi_hdr_metadata_block(const u8 *db) +{ + if (cea_db_tag(db) != USE_EXTENDED_TAG) + return false; + + if (db[1] != HDR_STATIC_METADATA_BLOCK) + return false; + + if (cea_db_payload_len(db) < 3) + return false; + + return true; +} + +static uint8_t eotf_supported(const u8 *edid_ext) +{ + return edid_ext[2] & + (BIT(HDMI_EOTF_TRADITIONAL_GAMMA_SDR) | + BIT(HDMI_EOTF_TRADITIONAL_GAMMA_HDR) | + BIT(HDMI_EOTF_SMPTE_ST2084) | + BIT(HDMI_EOTF_BT_2100_HLG)); +} + +static uint8_t hdr_metadata_type(const u8 *edid_ext) +{ + return edid_ext[3] & + BIT(HDMI_STATIC_METADATA_TYPE1); +} + +static void +drm_parse_hdr_metadata_block(struct drm_connector *connector, const u8 *db) +{ + u16 len; + + len = cea_db_payload_len(db); + + connector->hdr_sink_metadata.hdmi_type1.eotf = + eotf_supported(db); + connector->hdr_sink_metadata.hdmi_type1.metadata_type = + hdr_metadata_type(db); + + if (len >= 4) + connector->hdr_sink_metadata.hdmi_type1.max_cll = db[4]; + if (len >= 5) + connector->hdr_sink_metadata.hdmi_type1.max_fall = db[5]; + if (len >= 6) + connector->hdr_sink_metadata.hdmi_type1.min_cll = db[6]; +} + static void drm_parse_hdmi_vsdb_audio(struct drm_connector *connector, const u8 *db) { @@ -4458,6 +4511,8 @@ static void drm_parse_cea_ext(struct drm_connector *connector, drm_parse_y420cmdb_bitmap(connector, db); if (cea_db_is_vcdb(db)) drm_parse_vcdb(connector, db); + if (cea_db_is_hdmi_hdr_metadata_block(db)) + drm_parse_hdr_metadata_block(connector, db); } } @@ -4850,6 +4905,78 @@ static bool is_hdmi2_sink(struct drm_connector *connector) connector->display_info.color_formats & DRM_COLOR_FORMAT_YCRCB420; } +static inline bool is_eotf_supported(u8 output_eotf, u8 sink_eotf) +{ + return sink_eotf & BIT(output_eotf); +} + +/** + * drm_hdmi_infoframe_set_hdr_metadata() - fill an HDMI DRM infoframe with + * HDR metadata from userspace + * @frame: HDMI DRM infoframe + * @conn_state: Connector state containing HDR metadata + * + * Return: 0 on success or a negative error code on failure. + */ +int +drm_hdmi_infoframe_set_hdr_metadata(struct hdmi_drm_infoframe *frame, + const struct drm_connector_state *conn_state) +{ + struct drm_connector *connector; + struct hdr_output_metadata *hdr_metadata; + int err; + + if (!frame || !conn_state) + return -EINVAL; + + connector = conn_state->connector; + + if (!conn_state->hdr_output_metadata) + return -EINVAL; + + hdr_metadata = conn_state->hdr_output_metadata->data; + + if (!hdr_metadata || !connector) + return -EINVAL; + + /* Sink EOTF is Bit map while infoframe is absolute values */ + if (!is_eotf_supported(hdr_metadata->hdmi_metadata_type1.eotf, + connector->hdr_sink_metadata.hdmi_type1.eotf)) { + DRM_DEBUG_KMS("EOTF Not Supported\n"); + return -EINVAL; + } + + err = hdmi_drm_infoframe_init(frame); + if (err < 0) + return err; + + frame->eotf = hdr_metadata->hdmi_metadata_type1.eotf; + frame->metadata_type = hdr_metadata->hdmi_metadata_type1.metadata_type; + + BUILD_BUG_ON(sizeof(frame->display_primaries) != + sizeof(hdr_metadata->hdmi_metadata_type1.display_primaries)); + BUILD_BUG_ON(sizeof(frame->white_point) != + sizeof(hdr_metadata->hdmi_metadata_type1.white_point)); + + memcpy(&frame->display_primaries, + &hdr_metadata->hdmi_metadata_type1.display_primaries, + sizeof(frame->display_primaries)); + + memcpy(&frame->white_point, + &hdr_metadata->hdmi_metadata_type1.white_point, + sizeof(frame->white_point)); + + frame->max_display_mastering_luminance = + hdr_metadata->hdmi_metadata_type1.max_display_mastering_luminance; + frame->min_display_mastering_luminance = + hdr_metadata->hdmi_metadata_type1.min_display_mastering_luminance; + frame->max_fall = hdr_metadata->hdmi_metadata_type1.max_fall; + frame->max_cll = hdr_metadata->hdmi_metadata_type1.max_cll; + + return 0; +} +EXPORT_SYMBOL(drm_hdmi_infoframe_set_hdr_metadata); + /** * drm_hdmi_avi_infoframe_from_display_mode() - fill an HDMI AVI infoframe with * data from a DRM display mode |