{"id":474,"date":"2021-02-03T06:51:29","date_gmt":"2021-02-03T11:51:29","guid":{"rendered":"https:\/\/www.mgreene.org\/?p=474"},"modified":"2021-02-03T06:51:29","modified_gmt":"2021-02-03T11:51:29","slug":"nuc7pjyh-intel-uhd-graphics-605-a-problem-video-problem-on-the-way-to-happiness","status":"publish","type":"post","link":"https:\/\/www.mgreene.org\/?p=474","title":{"rendered":"NUC7PJYH: Intel UHD Graphics 605 A problem video problem on the way to happiness"},"content":{"rendered":"\n

The NUC J5005 uses built in Intel UHD Graphics 605<\/a> and I have it connected to a ViewSonic VG3448 34 Inch Ultra-Wide 21:9 WQHD. In the kernel config, it is configured as an i915. Short story, the first sign of problems is when the framebuffer is initialized which is followed by the first error:<\/p>\n\n\n\n

fbcon: i915drmfb (fb0) is primary device\nkernel: i915 0000:00:02.0: [drm] *ERROR* Invalid VCO\nkernel: Console: switching to colour frame buffer device 430x90\nkernel: i915 0000:00:02.0: [drm] *ERROR* Invalid VCO<\/code><\/pre>\n\n\n\n
There are follow on errors and X will not start. I fought this issue for a couple days then took it to work and try with a plain monitor (small Dell or something). Surprise! It worked perfect, so now I know it is a mismatch with my monitor. WTF? <\/p>\n\n\n\n
So, I started with the 5.10.9 kernel and found the “Invalid VCO” is coming from intel_dpll_mgr.c<\/em>.<\/p>\n\n\n\n
static bool bxt_ddi_set_dpll_hw_state(struct intel_crtc_state *crtc_state, const struct bxt_clk_div *clk_div)\n{\n\tstruct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);\n\tstruct intel_dpll_hw_state *dpll_hw_state = &crtc_state->dpll_hw_state;\n\tint clock = crtc_state->port_clock;\n\tint vco = clk_div->vco;\n\tu32 prop_coef, int_coef, gain_ctl, targ_cnt;\n\tu32 lanestagger;\n\n\tmemset(dpll_hw_state, 0, sizeof(*dpll_hw_state));\n\n\tif (vco >= 6200000 && vco <= 6700000) {\n\t\tprop_coef = 4;\n\t\tint_coef = 9;\n\t\tgain_ctl = 3;\n\t\ttarg_cnt = 8;\n\t} else if ((vco > 5400000 && vco < 6200000) ||\n\t\t\t(vco >= 4800000 && vco < 5400000)) {\n\t\tprop_coef = 5;\n\t\tint_coef = 11;\n\t\tgain_ctl = 3;\n\t\ttarg_cnt = 9;\n\t} else if (vco == 5400000) {\n\t\tprop_coef = 3;\n\t\tint_coef = 8;\n\t\tgain_ctl = 1;\n\t\ttarg_cnt = 9;\n\t} else {\n\t\tdrm_err(&i915->drm, \"Invalid VCO\\n\");\n\t\treturn false;\n\t}\n...<\/code><\/pre>\n\n\n\n
More poking around pointed to the i915 driver not being able to handle the data by monitor reported, so time to file an issue with the i915 driver group<\/a>. Thanks to Ville Syrj\u00e4l\u00e4 who came back with a patch yesterday:<\/p>\n\n\n\n
From 83e72257aca3386decb2b9d631c82e62732afd30 Mon Sep 17 00:00:00 2001\nFrom: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>\nDate: Tue, 2 Feb 2021 01:16:53 +0200\nSubject: [PATCH] drm\/i915: Reject 446-480MHz HDMI clock on GLK\nMIME-Version: 1.0\nContent-Type: text\/plain; charset=UTF-8\nContent-Transfer-Encoding: 8bit\n\nThe BXT\/GLK DPLL can't generate certain frequencies. We already\nreject the 233-240MHz range on both. But on GLK the DPLL max\nfrequency was bumped from 300MHz to 594MHz, so now we get to\nalso worry about the 446-480MHz range (double the original\nproblem range). Reject any frequency within the higher\nproblematic range as well.\n\nCc: stable@vger.kernel.org\nCloses: https:\/\/gitlab.freedesktop.org\/drm\/intel\/-\/issues\/3000\nSigned-off-by: Ville Syrj\u00e4l\u00e4 <ville.syrjala@linux.intel.com>\n---\n drivers\/gpu\/drm\/i915\/display\/intel_hdmi.c | 6 +++++-\n 1 file changed, 5 insertions(+), 1 deletion(-)\n\ndiff --git a\/drivers\/gpu\/drm\/i915\/display\/intel_hdmi.c b\/drivers\/gpu\/drm\/i915\/display\/intel_hdmi.c\nindex 66e1ac3887c6..b593a71e6517 100644\n--- a\/drivers\/gpu\/drm\/i915\/display\/intel_hdmi.c\n+++ b\/drivers\/gpu\/drm\/i915\/display\/intel_hdmi.c\n@@ -2218,7 +2218,11 @@ hdmi_port_clock_valid(struct intel_hdmi *hdmi,\n \t\t\t\t\t  has_hdmi_sink))\n \t\treturn MODE_CLOCK_HIGH;\n \n-\t\/* BXT DPLL can't generate 223-240 MHz *\/\n+\t\/* GLK DPLL can't generate 446-480 MHz *\/\n+\tif (IS_GEMINILAKE(dev_priv) && clock > 446666 && clock < 480000)\n+\t\treturn MODE_CLOCK_RANGE;\n+\n+\t\/* BXT\/GLK DPLL can't generate 223-240 MHz *\/\n \tif (IS_GEN9_LP(dev_priv) && clock > 223333 && clock < 240000)\n \t\treturn MODE_CLOCK_RANGE;\n \n-- \n2.26.2<\/code><\/pre>\n\n\n\n
I inserted the patch into the 5.10.12 kernel code and was back in business. The down side is I’ll have to remember to keep patching until it makes it into the kernel sources proper. <\/p>\n","protected":false},"excerpt":{"rendered":"
The NUC J5005 uses built in Intel UHD Graphics 605 and I have it connected to a ViewSonic VG3448 34 Inch Ultra-Wide 21:9 WQHD. In the kernel config, it is […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"_links_to":"","_links_to_target":""},"categories":[12,92,18,20,40],"tags":[99,101,100,94,95],"class_list":["post-474","post","type-post","status-publish","format-standard","hentry","category-gentoo","category-intel-nuc","category-kernel","category-linux","category-viewsonic","tag-gento","tag-i915","tag-kernel","tag-nuc-kit","tag-nuc7pjyh"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":471,"url":"https:\/\/www.mgreene.org\/?p=471","url_meta":{"origin":474,"position":0},"title":"NUC7PJYH: Closing out Gentoo on the Intel NUC","author":"Mike","date":"February 20, 2021","format":false,"excerpt":"Well, the NUC is done and everything to working. It is definitely not a speed demon, Geekbench scores prove it with a 158 Single-Core Score and 570 Multi-Core Score. NUC: Gnome Screen NUC: Gnome Overview with settings window, dash to dock, and workspaces to dock. I did try Wayland, and\u2026","rel":"","context":"In "Gentoo"","block_context":{"text":"Gentoo","link":"https:\/\/www.mgreene.org\/?cat=12"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.mgreene.org\/wp-content\/uploads\/2021\/02\/about-1.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.mgreene.org\/wp-content\/uploads\/2021\/02\/about-1.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.mgreene.org\/wp-content\/uploads\/2021\/02\/about-1.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.mgreene.org\/wp-content\/uploads\/2021\/02\/about-1.png?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":460,"url":"https:\/\/www.mgreene.org\/?p=460","url_meta":{"origin":474,"position":1},"title":"NUC7PJYH:  Gentoo UEFI Configure","author":"Mike","date":"February 20, 2021","format":false,"excerpt":"This is no fun exercise. 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There is also a link\u2026","rel":"","context":"In "Gentoo"","block_context":{"text":"Gentoo","link":"https:\/\/www.mgreene.org\/?cat=12"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.mgreene.org\/wp-content\/uploads\/2021\/01\/nuc_bottom-1.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.mgreene.org\/wp-content\/uploads\/2021\/01\/nuc_bottom-1.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.mgreene.org\/wp-content\/uploads\/2021\/01\/nuc_bottom-1.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.mgreene.org\/wp-content\/uploads\/2021\/01\/nuc_bottom-1.png?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":290,"url":"https:\/\/www.mgreene.org\/?p=290","url_meta":{"origin":474,"position":4},"title":"New toy – ASRock J3455-ITX","author":"Mike","date":"November 29, 2018","format":false,"excerpt":"Part because of a mistake and part for fun, I purchased an ASRock J3455-ITX.\u00a0 I tried to boot a couple different OSs without much luck, I could not get CoreOS to boot or even a Gentoo LiveCD. 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