The patch below does not apply to the 5.15-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.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From b6dfa416172939edaa46a5a647457b94c6d94119 Mon Sep 17 00:00:00 2001

From: Swati Sharma swati2.sharma@intel.com Date: Thu, 12 Aug 2021 18:41:07 +0530 Subject: [PATCH] drm/i915/dp: Drop redundant debug print MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit

drm_dp_dpcd_read/write already has debug error message. Drop redundant error messages which gives false status even if correct value is read in drm_dp_dpcd_read().

v2: -Added fixes tag (Ankit) v3: -Fixed build error (CI)

Fixes: 9488a030ac91 ("drm/i915: Add support for enabling link status and recovery") Cc: Ankit Nautiyal ankit.k.nautiyal@intel.com Cc: Imre Deak imre.deak@intel.com Cc: Jani Nikula jani.nikula@intel.com Cc: José Roberto de Souza jose.souza@intel.com Cc: Manasi Navare manasi.d.navare@intel.com Cc: Sean Paul seanpaul@chromium.org Cc: Uma Shankar uma.shankar@intel.com Cc: Ville Syrjälä ville.syrjala@linux.intel.com Cc: stable@vger.kernel.org # v5.12+ Reviewed-by: Jani Nikula jani.nikula@intel.com Signed-off-by: Swati Sharma swati2.sharma@intel.com Signed-off-by: Jani Nikula jani.nikula@intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20210812131107.5531-1-swati2.s...

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 7e5d9b959c1d..fd4f7e82e420 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -3917,23 +3917,18 @@ static void intel_dp_check_device_service_irq(struct intel_dp *intel_dp)

static void intel_dp_check_link_service_irq(struct intel_dp *intel_dp) { - struct drm_i915_private *i915 = dp_to_i915(intel_dp); u8 val;

if (intel_dp->dpcd[DP_DPCD_REV] < 0x11) return;

if (drm_dp_dpcd_readb(&intel_dp->aux, - DP_LINK_SERVICE_IRQ_VECTOR_ESI0, &val) != 1 || !val) { - drm_dbg_kms(&i915->drm, "Error in reading link service irq vector\n"); + DP_LINK_SERVICE_IRQ_VECTOR_ESI0, &val) != 1 || !val) return; - }

if (drm_dp_dpcd_writeb(&intel_dp->aux, - DP_LINK_SERVICE_IRQ_VECTOR_ESI0, val) != 1) { - drm_dbg_kms(&i915->drm, "Error in writing link service irq vector\n"); + DP_LINK_SERVICE_IRQ_VECTOR_ESI0, val) != 1) return; - }

if (val & HDMI_LINK_STATUS_CHANGED) intel_dp_handle_hdmi_link_status_change(intel_dp);