From c324acd5032f516b8188da99d2ce05cf8d1294d6 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Wed, 8 Dec 2010 22:13:06 -0500 Subject: [PATCH] drm/radeon/kms: parse the extended LCD info block This block may contain various additional LCD info such as physical size and a stored EDID. Signed-off-by: Alex Deucher Signed-off-by: Dave Airlie --- drivers/gpu/drm/radeon/radeon_atombios.c | 53 ++++++++++++++++++++++++ drivers/gpu/drm/radeon/radeon_combios.c | 3 +- drivers/gpu/drm/radeon/radeon_display.c | 14 +++++-- drivers/gpu/drm/radeon/radeon_mode.h | 2 +- 4 files changed, 67 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c index 35c5ff09040d..d6c611eee204 100644 --- a/drivers/gpu/drm/radeon/radeon_atombios.c +++ b/drivers/gpu/drm/radeon/radeon_atombios.c @@ -1515,6 +1515,59 @@ struct radeon_encoder_atom_dig *radeon_atombios_get_lvds_info(struct else lvds->linkb = false; + /* parse the lcd record table */ + if (lvds_info->info.usModePatchTableOffset) { + ATOM_FAKE_EDID_PATCH_RECORD *fake_edid_record; + ATOM_PANEL_RESOLUTION_PATCH_RECORD *panel_res_record; + bool bad_record = false; + u8 *record = (u8 *)(mode_info->atom_context->bios + + data_offset + + lvds_info->info.usModePatchTableOffset); + while (*record != ATOM_RECORD_END_TYPE) { + switch (*record) { + case LCD_MODE_PATCH_RECORD_MODE_TYPE: + record += sizeof(ATOM_PATCH_RECORD_MODE); + break; + case LCD_RTS_RECORD_TYPE: + record += sizeof(ATOM_LCD_RTS_RECORD); + break; + case LCD_CAP_RECORD_TYPE: + record += sizeof(ATOM_LCD_MODE_CONTROL_CAP); + break; + case LCD_FAKE_EDID_PATCH_RECORD_TYPE: + fake_edid_record = (ATOM_FAKE_EDID_PATCH_RECORD *)record; + if (fake_edid_record->ucFakeEDIDLength) { + struct edid *edid; + int edid_size = + max((int)EDID_LENGTH, (int)fake_edid_record->ucFakeEDIDLength); + edid = kmalloc(edid_size, GFP_KERNEL); + if (edid) { + memcpy((u8 *)edid, (u8 *)&fake_edid_record->ucFakeEDIDString[0], + fake_edid_record->ucFakeEDIDLength); + + if (drm_edid_is_valid(edid)) + rdev->mode_info.bios_hardcoded_edid = edid; + else + kfree(edid); + } + } + record += sizeof(ATOM_FAKE_EDID_PATCH_RECORD); + break; + case LCD_PANEL_RESOLUTION_RECORD_TYPE: + panel_res_record = (ATOM_PANEL_RESOLUTION_PATCH_RECORD *)record; + lvds->native_mode.width_mm = panel_res_record->usHSize; + lvds->native_mode.height_mm = panel_res_record->usVSize; + record += sizeof(ATOM_PANEL_RESOLUTION_PATCH_RECORD); + break; + default: + DRM_ERROR("Bad LCD record %d\n", *record); + bad_record = true; + break; + } + if (bad_record) + break; + } + } } return lvds; } diff --git a/drivers/gpu/drm/radeon/radeon_combios.c b/drivers/gpu/drm/radeon/radeon_combios.c index 3bddea5b5295..111a844c1ecb 100644 --- a/drivers/gpu/drm/radeon/radeon_combios.c +++ b/drivers/gpu/drm/radeon/radeon_combios.c @@ -471,8 +471,9 @@ bool radeon_combios_check_hardcoded_edid(struct radeon_device *rdev) return true; } +/* this is used for atom LCDs as well */ struct edid * -radeon_combios_get_hardcoded_edid(struct radeon_device *rdev) +radeon_bios_get_hardcoded_edid(struct radeon_device *rdev) { if (rdev->mode_info.bios_hardcoded_edid) return rdev->mode_info.bios_hardcoded_edid; diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c index 7b17e639ab32..acebbc76c2f9 100644 --- a/drivers/gpu/drm/radeon/radeon_display.c +++ b/drivers/gpu/drm/radeon/radeon_display.c @@ -679,9 +679,17 @@ int radeon_ddc_get_modes(struct radeon_connector *radeon_connector) if (!radeon_connector->edid) { radeon_connector->edid = drm_get_edid(&radeon_connector->base, &radeon_connector->ddc_bus->adapter); } - /* some servers provide a hardcoded edid in rom for KVMs */ - if (!radeon_connector->edid) - radeon_connector->edid = radeon_combios_get_hardcoded_edid(rdev); + + if (!radeon_connector->edid) { + if (rdev->is_atom_bios) { + /* some laptops provide a hardcoded edid in rom for LCDs */ + if (((radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_LVDS) || + (radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_eDP))) + radeon_connector->edid = radeon_bios_get_hardcoded_edid(rdev); + } else + /* some servers provide a hardcoded edid in rom for KVMs */ + radeon_connector->edid = radeon_bios_get_hardcoded_edid(rdev); + } if (radeon_connector->edid) { drm_mode_connector_update_edid_property(&radeon_connector->base, radeon_connector->edid); ret = drm_add_edid_modes(&radeon_connector->base, radeon_connector->edid); diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h index f406f02bf14e..fd185f783a31 100644 --- a/drivers/gpu/drm/radeon/radeon_mode.h +++ b/drivers/gpu/drm/radeon/radeon_mode.h @@ -566,7 +566,7 @@ extern int radeon_get_crtc_scanoutpos(struct drm_device *dev, int crtc, extern bool radeon_combios_check_hardcoded_edid(struct radeon_device *rdev); extern struct edid * -radeon_combios_get_hardcoded_edid(struct radeon_device *rdev); +radeon_bios_get_hardcoded_edid(struct radeon_device *rdev); extern bool radeon_atom_get_clock_info(struct drm_device *dev); extern bool radeon_combios_get_clock_info(struct drm_device *dev); extern struct radeon_encoder_atom_dig * -- GitLab