This is a note to let you know that I've just added the patch titled drm/i915/sdvo: Setup DDC fully before output init to the 5.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: drm-i915-sdvo-setup-ddc-fully-before-output-init.patch and it can be found in the queue-5.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From e79762512120f11c51317570519a1553c70805d8 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@xxxxxxxxxxxxxxx> Date: Wed, 26 Oct 2022 13:11:28 +0300 Subject: drm/i915/sdvo: Setup DDC fully before output init MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> commit e79762512120f11c51317570519a1553c70805d8 upstream. Call intel_sdvo_select_ddc_bus() before initializing any of the outputs. And before that is functional (assuming no VBT) we have to set up the controlled_outputs thing. Otherwise DDC won't be functional during the output init but LVDS really needs it for the fixed mode setup. Note that the whole multi output support still looks very bogus, and more work will be needed to make it correct. But for now this should at least fix the LVDS EDID fixed mode setup. Cc: stable@xxxxxxxxxxxxxxx Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/7301 Fixes: aa2b88074a56 ("drm/i915/sdvo: Fix multi function encoder stuff") Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> Link: https://patchwork.freedesktop.org/patch/msgid/20221026101134.20865-3-ville.syrjala@xxxxxxxxxxxxxxx Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx> (cherry picked from commit 64b7b557dc8a96d9cfed6aedbf81de2df80c025d) Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/i915/display/intel_sdvo.c | 31 +++++++++++------------------- 1 file changed, 12 insertions(+), 19 deletions(-) --- a/drivers/gpu/drm/i915/display/intel_sdvo.c +++ b/drivers/gpu/drm/i915/display/intel_sdvo.c @@ -2693,13 +2693,10 @@ intel_sdvo_dvi_init(struct intel_sdvo *i if (!intel_sdvo_connector) return false; - if (device == 0) { - intel_sdvo->controlled_output |= SDVO_OUTPUT_TMDS0; + if (device == 0) intel_sdvo_connector->output_flag = SDVO_OUTPUT_TMDS0; - } else if (device == 1) { - intel_sdvo->controlled_output |= SDVO_OUTPUT_TMDS1; + else if (device == 1) intel_sdvo_connector->output_flag = SDVO_OUTPUT_TMDS1; - } intel_connector = &intel_sdvo_connector->base; connector = &intel_connector->base; @@ -2753,7 +2750,6 @@ intel_sdvo_tv_init(struct intel_sdvo *in encoder->encoder_type = DRM_MODE_ENCODER_TVDAC; connector->connector_type = DRM_MODE_CONNECTOR_SVIDEO; - intel_sdvo->controlled_output |= type; intel_sdvo_connector->output_flag = type; if (intel_sdvo_connector_init(intel_sdvo_connector, intel_sdvo) < 0) { @@ -2794,13 +2790,10 @@ intel_sdvo_analog_init(struct intel_sdvo encoder->encoder_type = DRM_MODE_ENCODER_DAC; connector->connector_type = DRM_MODE_CONNECTOR_VGA; - if (device == 0) { - intel_sdvo->controlled_output |= SDVO_OUTPUT_RGB0; + if (device == 0) intel_sdvo_connector->output_flag = SDVO_OUTPUT_RGB0; - } else if (device == 1) { - intel_sdvo->controlled_output |= SDVO_OUTPUT_RGB1; + else if (device == 1) intel_sdvo_connector->output_flag = SDVO_OUTPUT_RGB1; - } if (intel_sdvo_connector_init(intel_sdvo_connector, intel_sdvo) < 0) { kfree(intel_sdvo_connector); @@ -2830,13 +2823,10 @@ intel_sdvo_lvds_init(struct intel_sdvo * encoder->encoder_type = DRM_MODE_ENCODER_LVDS; connector->connector_type = DRM_MODE_CONNECTOR_LVDS; - if (device == 0) { - intel_sdvo->controlled_output |= SDVO_OUTPUT_LVDS0; + if (device == 0) intel_sdvo_connector->output_flag = SDVO_OUTPUT_LVDS0; - } else if (device == 1) { - intel_sdvo->controlled_output |= SDVO_OUTPUT_LVDS1; + else if (device == 1) intel_sdvo_connector->output_flag = SDVO_OUTPUT_LVDS1; - } if (intel_sdvo_connector_init(intel_sdvo_connector, intel_sdvo) < 0) { kfree(intel_sdvo_connector); @@ -2889,8 +2879,14 @@ static u16 intel_sdvo_filter_output_flag static bool intel_sdvo_output_setup(struct intel_sdvo *intel_sdvo, u16 flags) { + struct drm_i915_private *i915 = to_i915(intel_sdvo->base.base.dev); + flags = intel_sdvo_filter_output_flags(flags); + intel_sdvo->controlled_output = flags; + + intel_sdvo_select_ddc_bus(i915, intel_sdvo); + if (flags & SDVO_OUTPUT_TMDS0) if (!intel_sdvo_dvi_init(intel_sdvo, 0)) return false; @@ -2931,7 +2927,6 @@ intel_sdvo_output_setup(struct intel_sdv if (flags == 0) { unsigned char bytes[2]; - intel_sdvo->controlled_output = 0; memcpy(bytes, &intel_sdvo->caps.output_flags, 2); DRM_DEBUG_KMS("%s: Unknown SDVO output type (0x%02x%02x)\n", SDVO_NAME(intel_sdvo), @@ -3338,8 +3333,6 @@ bool intel_sdvo_init(struct drm_i915_pri */ intel_sdvo->base.cloneable = 0; - intel_sdvo_select_ddc_bus(dev_priv, intel_sdvo); - /* Set the input timing to the screen. Assume always input 0. */ if (!intel_sdvo_set_target_input(intel_sdvo)) goto err_output; Patches currently in stable-queue which might be from ville.syrjala@xxxxxxxxxxxxxxx are queue-5.4/drm-i915-sdvo-filter-out-invalid-outputs-more-sensibly.patch queue-5.4/drm-i915-sdvo-setup-ddc-fully-before-output-init.patch