| Message ID | 20210812131107.5531-1-swati2.sharma@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v3] drm/i915/display: Drop redundant debug print | expand |
On Thu, Aug 12, 2021 at 06:41:07PM +0530, Swati Sharma wrote: > 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: Swati Sharma <swati2.sharma@intel.com> > Cc: Ankit Nautiyal <ankit.k.nautiyal@intel.com> > Cc: Uma Shankar <uma.shankar@intel.com> (v2) > Cc: Jani Nikula <jani.nikula@intel.com> > Cc: "Ville Syrj_l_" <ville.syrjala@linux.intel.com> > Cc: Imre Deak <imre.deak@intel.com> > Cc: Manasi Navare <manasi.d.navare@intel.com> > Cc: Uma Shankar <uma.shankar@intel.com> > Cc: "Jos_ Roberto de Souza" <jose.souza@intel.com> > Cc: Sean Paul <seanpaul@chromium.org> > Cc: <stable@vger.kernel.org> # v5.12+ > > Link: https://patchwork.freedesktop.org/patch/msgid/20201218103723.30844-12-ankit.k.nautiyal@intel.com > > Signed-off-by: Swati Sharma <swati2.sharma@intel.com> > --- > drivers/gpu/drm/i915/display/intel_dp.c | 9 ++------- > 1 file changed, 2 insertions(+), 7 deletions(-) > > diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c > index c386ef8eb200..2526c9c8c690 100644 > --- a/drivers/gpu/drm/i915/display/intel_dp.c > +++ b/drivers/gpu/drm/i915/display/intel_dp.c > @@ -3864,23 +3864,18 @@ 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"); The only problem seems to be that for !val the debug print is incorrect, so maybe just have a separate check for that after this one for the read() and return w/o the debug message? Is it really a stable material, since the change wouldn't have any effect for regular users? > + 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); > -- > 2.25.1 >
On 12-Aug-21 9:31 PM, Imre Deak wrote: > On Thu, Aug 12, 2021 at 06:41:07PM +0530, Swati Sharma wrote: >> 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: Swati Sharma <swati2.sharma@intel.com> >> Cc: Ankit Nautiyal <ankit.k.nautiyal@intel.com> >> Cc: Uma Shankar <uma.shankar@intel.com> (v2) >> Cc: Jani Nikula <jani.nikula@intel.com> >> Cc: "Ville Syrj_l_" <ville.syrjala@linux.intel.com> >> Cc: Imre Deak <imre.deak@intel.com> >> Cc: Manasi Navare <manasi.d.navare@intel.com> >> Cc: Uma Shankar <uma.shankar@intel.com> >> Cc: "Jos_ Roberto de Souza" <jose.souza@intel.com> >> Cc: Sean Paul <seanpaul@chromium.org> >> Cc: <stable@vger.kernel.org> # v5.12+ >> >> Link: https://patchwork.freedesktop.org/patch/msgid/20201218103723.30844-12-ankit.k.nautiyal@intel.com >> >> Signed-off-by: Swati Sharma <swati2.sharma@intel.com> >> --- >> drivers/gpu/drm/i915/display/intel_dp.c | 9 ++------- >> 1 file changed, 2 insertions(+), 7 deletions(-) >> >> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c >> index c386ef8eb200..2526c9c8c690 100644 >> --- a/drivers/gpu/drm/i915/display/intel_dp.c >> +++ b/drivers/gpu/drm/i915/display/intel_dp.c >> @@ -3864,23 +3864,18 @@ 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"); > > The only problem seems to be that for !val the debug print is incorrect, > so maybe just have a separate check for that after this one for the read() > and return w/o the debug message? > > Is it really a stable material, since the change wouldn't have any > effect for regular users? > W/o this change in case of valid short pulse this error message will come even if it doesn't have anything to do with link service irq. For ex: in case of hdcp we keep getting unnecessary error message because the value read is 0 which will always be the case unless its really a link failure between PCON and HDMI2.1 sink. Also, code is written in accordance with other IRQ func() above like intel_dp_check_device_service_irq(). >> + 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); >> -- >> 2.25.1 >>
On Mon, Aug 16, 2021 at 05:23:00PM +0530, Sharma, Swati2 wrote: > On 12-Aug-21 9:31 PM, Imre Deak wrote: > > On Thu, Aug 12, 2021 at 06:41:07PM +0530, Swati Sharma wrote: > > > 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: Swati Sharma <swati2.sharma@intel.com> > > > Cc: Ankit Nautiyal <ankit.k.nautiyal@intel.com> > > > Cc: Uma Shankar <uma.shankar@intel.com> (v2) > > > Cc: Jani Nikula <jani.nikula@intel.com> > > > Cc: "Ville Syrj_l_" <ville.syrjala@linux.intel.com> > > > Cc: Imre Deak <imre.deak@intel.com> > > > Cc: Manasi Navare <manasi.d.navare@intel.com> > > > Cc: Uma Shankar <uma.shankar@intel.com> > > > Cc: "Jos_ Roberto de Souza" <jose.souza@intel.com> > > > Cc: Sean Paul <seanpaul@chromium.org> > > > Cc: <stable@vger.kernel.org> # v5.12+ > > > > > > Link: https://patchwork.freedesktop.org/patch/msgid/20201218103723.30844-12-ankit.k.nautiyal@intel.com > > > > > > Signed-off-by: Swati Sharma <swati2.sharma@intel.com> > > > --- > > > drivers/gpu/drm/i915/display/intel_dp.c | 9 ++------- > > > 1 file changed, 2 insertions(+), 7 deletions(-) > > > > > > diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c > > > index c386ef8eb200..2526c9c8c690 100644 > > > --- a/drivers/gpu/drm/i915/display/intel_dp.c > > > +++ b/drivers/gpu/drm/i915/display/intel_dp.c > > > @@ -3864,23 +3864,18 @@ 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"); > > > > The only problem seems to be that for !val the debug print is incorrect, > > so maybe just have a separate check for that after this one for the read() > > and return w/o the debug message? > > > > Is it really a stable material, since the change wouldn't have any > > effect for regular users? > > W/o this change in case of valid short pulse this error message will > come even if it doesn't have anything to do with link service irq. For > ex: in case of hdcp we keep getting unnecessary error message because > the value read is 0 which will always be the case unless its really a > link failure between PCON and HDMI2.1 sink. Yes, that's why I suggested to return for the '0 value read' case without any message printed, but still keep the message for the case when the drm_dp_dpcd_readb() fails. Note that it's not an error message but a debug message. > Also, code is written in accordance with other IRQ func() above like > intel_dp_check_device_service_irq(). Ok, it's good to keep them in sync at least, so I'm ok with removing the debug messages from here too. > > > + 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); > > > -- > > > 2.25.1 > > > > > -- > ~Swati Sharma
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index c386ef8eb200..2526c9c8c690 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -3864,23 +3864,18 @@ 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);
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: Swati Sharma <swati2.sharma@intel.com> Cc: Ankit Nautiyal <ankit.k.nautiyal@intel.com> Cc: Uma Shankar <uma.shankar@intel.com> (v2) Cc: Jani Nikula <jani.nikula@intel.com> Cc: "Ville Syrj_l_" <ville.syrjala@linux.intel.com> Cc: Imre Deak <imre.deak@intel.com> Cc: Manasi Navare <manasi.d.navare@intel.com> Cc: Uma Shankar <uma.shankar@intel.com> Cc: "Jos_ Roberto de Souza" <jose.souza@intel.com> Cc: Sean Paul <seanpaul@chromium.org> Cc: <stable@vger.kernel.org> # v5.12+ Link: https://patchwork.freedesktop.org/patch/msgid/20201218103723.30844-12-ankit.k.nautiyal@intel.com Signed-off-by: Swati Sharma <swati2.sharma@intel.com> --- drivers/gpu/drm/i915/display/intel_dp.c | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-)