The patch below does not apply to the 4.14-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.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-4.14.y git checkout FETCH_HEAD git cherry-pick -x 8f9f5fb94dbea843621740e6b25b3b430a83cf29 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '1678448392176204@kroah.com' --subject-prefix 'PATCH 4.14.y' HEAD^..
Possible dependencies:
8f9f5fb94dbe ("drm/i915: Fix VBT DSI DVO port handling") 005e95377249 ("drm/i915/display: Eliminate most usage of INTEL_GEN()") 984982f3ef7b ("drm/i915/ilk-glk: Fix link training on links with LTTPRs") d0ab409d05fe ("drm/i915/bios: add helper functions to check output support") dbd440d8e088 ("drm/i915/bios: mass convert dev_priv to i915") 35bb28ece90d ("Merge drm/drm-next into drm-intel-next")
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 8f9f5fb94dbea843621740e6b25b3b430a83cf29 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= ville.syrjala@linux.intel.com Date: Tue, 7 Feb 2023 08:43:35 +0200 Subject: [PATCH] drm/i915: Fix VBT DSI DVO port handling MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit
Turns out modern (icl+) VBTs still declare their DSI ports as MIPI-A and MIPI-C despite the PHYs now being A and B. Remap appropriately to allow the panels declared as MIPI-C to work.
Cc: stable@vger.kernel.org Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/8016 Signed-off-by: Ville Syrjälä ville.syrjala@linux.intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20230207064337.18697-2-ville.s... Reviewed-by: Jani Nikula jani.nikula@intel.com (cherry picked from commit 118b5c136c04da705b274b0d39982bb8b7430fc5) Signed-off-by: Jani Nikula jani.nikula@intel.com
diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c index e6ca51232dcf..06a2d98d2277 100644 --- a/drivers/gpu/drm/i915/display/intel_bios.c +++ b/drivers/gpu/drm/i915/display/intel_bios.c @@ -2467,6 +2467,22 @@ static enum port dvo_port_to_port(struct drm_i915_private *i915, dvo_port); }
+static enum port +dsi_dvo_port_to_port(struct drm_i915_private *i915, u8 dvo_port) +{ + switch (dvo_port) { + case DVO_PORT_MIPIA: + return PORT_A; + case DVO_PORT_MIPIC: + if (DISPLAY_VER(i915) >= 11) + return PORT_B; + else + return PORT_C; + default: + return PORT_NONE; + } +} + static int parse_bdb_230_dp_max_link_rate(const int vbt_max_link_rate) { switch (vbt_max_link_rate) { @@ -3442,19 +3458,16 @@ bool intel_bios_is_dsi_present(struct drm_i915_private *i915,
dvo_port = child->dvo_port;
- if (dvo_port == DVO_PORT_MIPIA || - (dvo_port == DVO_PORT_MIPIB && DISPLAY_VER(i915) >= 11) || - (dvo_port == DVO_PORT_MIPIC && DISPLAY_VER(i915) < 11)) { - if (port) - *port = dvo_port - DVO_PORT_MIPIA; - return true; - } else if (dvo_port == DVO_PORT_MIPIB || - dvo_port == DVO_PORT_MIPIC || - dvo_port == DVO_PORT_MIPID) { + if (dsi_dvo_port_to_port(i915, dvo_port) == PORT_NONE) { drm_dbg_kms(&i915->drm, "VBT has unsupported DSI port %c\n", port_name(dvo_port - DVO_PORT_MIPIA)); + continue; } + + if (port) + *port = dsi_dvo_port_to_port(i915, dvo_port); + return true; }
return false; @@ -3539,7 +3552,7 @@ bool intel_bios_get_dsc_params(struct intel_encoder *encoder, if (!(child->device_type & DEVICE_TYPE_MIPI_OUTPUT)) continue;
- if (child->dvo_port - DVO_PORT_MIPIA == encoder->port) { + if (dsi_dvo_port_to_port(i915, child->dvo_port) == encoder->port) { if (!devdata->dsc) return false;