<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=us-ascii"> <style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style> </head> <body dir="ltr"> [AMD Official Use Only - AMD Internal Distribution Only] <div> <div class="elementToProof" style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> Thanks Alex, I'll fix that and push. </div> <div class="elementToProof" style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> </div> <div class="elementToProof" style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> </div> <div id="Signature" class="elementToProof" style="color: inherit;"> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> --</div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> </div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> Regards,</div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> Jay </div> </div> <div id="appendonsend"></div> <hr style="display:inline-block;width:98%" tabindex="-1"> <div id="divRplyFwdMsg" dir="ltr">From: Hung, Alex <Alex.Hung@amd.com> Sent: Monday, March 3, 2025 4:48 PM To: Pillai, Aurabindo <Aurabindo.Pillai@amd.com>; amd-gfx@lists.freedesktop.org <amd-gfx@lists.freedesktop.org> Cc: Wentland, Harry <Harry.Wentland@amd.com>; Li, Sun peng (Leo) <Sunpeng.Li@amd.com>; Deucher, Alexander <Alexander.Deucher@amd.com> Subject: Re: [PATCH 1/2] drm/amd/display: Add a temp w/a for a panel <div> </div> </div> <div class="BodyFragment"> <div class="PlainText">This has conflicts to latest asdn and a minor spacing issue below. The others look good to me. Reviewed-by: Alex Hung <alex.hung@amd.com> On 3/3/25 06:50, Aurabindo Pillai wrote: > Implement w/a for a panel which requires 10s delay after link detect. > > Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com> > --- > .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 24 ++++++++++++++++++- > .../amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 10 ++++++-- > drivers/gpu/drm/amd/display/dc/dc_types.h | 1 + > 3 files changed, 32 insertions(+), 3 deletions(-) > > 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 73c95c3c39f9..3a2843e3367e 100644 > --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c > +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c > @@ -3327,6 +3327,21 @@ static void dm_gpureset_commit_state(struct dc_state *dc_state, > } > } > > +static void apply_delay_after_dpcd_poweroff(struct amdgpu_device *adev, struct dc_sink *sink) { > + struct dc_panel_patch *ppatch = NULL; > + > + if (!sink) > + return; > + > + ppatch = &sink->edid_caps.panel_patch; > + if (ppatch->wait_after_dpcd_poweroff_ms) { > + msleep(ppatch->wait_after_dpcd_poweroff_ms); > + drm_dbg_driver(adev_to_drm(adev), "%s: adding a %ds delay as w/a for panel\n", > + __func__, > + ppatch->wait_after_dpcd_poweroff_ms / 1000); This doesn't look aligned to me, and maybe the two line can fit into one. But this is just my opinions. > + } > +} > + > static int dm_resume(struct amdgpu_ip_block *ip_block) > { > struct amdgpu_device *adev = ip_block->adev; > @@ -3448,6 +3463,7 @@ static int dm_resume(struct amdgpu_ip_block *ip_block) > /* Do detection*/ > drm_connector_list_iter_begin(ddev, &iter); > drm_for_each_connector_iter(connector, &iter) { > + bool ret; > > if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK) > continue; > @@ -3473,7 +3489,11 @@ static int dm_resume(struct amdgpu_ip_block *ip_block) > } else { > guard(mutex)(&dm->dc_lock); > dc_exit_ips_for_hw_access(dm->dc); > - dc_link_detect(aconnector->dc_link, DETECT_REASON_RESUMEFROMS3S4); > + ret = dc_link_detect(aconnector->dc_link, DETECT_REASON_RESUMEFROMS3S4); > + if (ret) { > + /* w/a delay for certain panels */ > + apply_delay_after_dpcd_poweroff(adev, aconnector->dc_sink); > + } > } > > if (aconnector->fake_enable && aconnector->dc_link->local_sink) > @@ -3834,6 +3854,8 @@ static void handle_hpd_irq_helper(struct amdgpu_dm_connector *aconnector) > ret = dc_link_detect(aconnector->dc_link, DETECT_REASON_HPD); > } > if (ret) { > + /* w/a delay for certain panels */ > + apply_delay_after_dpcd_poweroff(adev, aconnector->dc_sink); > amdgpu_dm_update_connector_after_detect(aconnector); > > drm_modeset_lock_all(dev); > diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c > index fbd80d8545a8..253aac93e3d8 100644 > --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c > +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c > @@ -55,11 +55,16 @@ static u32 edid_extract_panel_id(struct edid *edid) > (u32)EDID_PRODUCT_ID(edid); > } > > -static void apply_edid_quirks(struct edid *edid, struct dc_edid_caps *edid_caps) > +static void apply_edid_quirks(struct drm_device *dev, struct edid *edid, struct dc_edid_caps *edid_caps) > { > uint32_t panel_id = edid_extract_panel_id(edid); > > switch (panel_id) { > + /* Workaround for monitors that need a delay after detecting the link */ > + case drm_edid_encode_panel_id('G', 'B', 'T', 0x3215): > + drm_dbg_driver(dev, "Add 10s delay for link detection for panel id %X\n", panel_id); > + edid_caps->panel_patch.wait_after_dpcd_poweroff_ms = 10000; > + break; > /* Workaround for some monitors which does not work well with FAMS */ > case drm_edid_encode_panel_id('S', 'A', 'M', 0x0E5E): > case drm_edid_encode_panel_id('S', 'A', 'M', 0x7053): > @@ -101,6 +106,7 @@ enum dc_edid_status dm_helpers_parse_edid_caps( > { > struct amdgpu_dm_connector *aconnector = link->priv; > struct drm_connector *connector = &aconnector->base; > + struct drm_device *dev = connector->dev; > struct edid *edid_buf = edid ? (struct edid *) edid->raw_edid : NULL; > struct cea_sad *sads; > int sad_count = -1; > @@ -130,7 +136,7 @@ enum dc_edid_status dm_helpers_parse_edid_caps( > > edid_caps->edid_hdmi = connector->display_info.is_hdmi; > > - apply_edid_quirks(edid_buf, edid_caps); > + apply_edid_quirks(dev, edid_buf, edid_caps); > > sad_count = drm_edid_to_sad((struct edid *) edid->raw_edid, &sads); > if (sad_count <= 0) > diff --git a/drivers/gpu/drm/amd/display/dc/dc_types.h b/drivers/gpu/drm/amd/display/dc/dc_types.h > index e60898c2df01..acd3b373a18e 100644 > --- a/drivers/gpu/drm/amd/display/dc/dc_types.h > +++ b/drivers/gpu/drm/amd/display/dc/dc_types.h > @@ -181,6 +181,7 @@ struct dc_panel_patch { > uint8_t blankstream_before_otg_off; > bool oled_optimize_display_on; > unsigned int force_mst_blocked_discovery; > + unsigned int wait_after_dpcd_poweroff_ms; > }; > > struct dc_edid_caps { </div> </div> </div> </body> </html>