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From: Lyude Paul <lyude@redhat.com>
To: Jani Nikula <jani.nikula@intel.com>, intel-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org, ville.syrjala@linux.intel.com,
	 manasi.d.navare@intel.com
Subject: Re: [Intel-gfx] [PATCH v3 02/13] drm/dp: use more of the extended receiver cap
Date: Thu, 09 Sep 2021 12:18:05 -0400	[thread overview]
Message-ID: <282213f032b3dfe10cf7c461083c26b474f09f0f.camel@redhat.com> (raw)
In-Reply-To: <649051cb896821147feee91aab1f2abc523c1353.1631191763.git.jani.nikula@intel.com>

I thought I remembered an issue with this but looked up the previous emails,
and it looks like that this change actually should be safe!

Signed-off-by: Lyude Paul <lyude@redhat.com>

On Thu, 2021-09-09 at 15:51 +0300, Jani Nikula wrote:
> Extend the use of extended receiver cap at 0x2200 to cover
> MAIN_LINK_CHANNEL_CODING_CAP in 0x2206, in case an implementation hides
> the DP 2.0 128b/132b channel encoding cap.
> 
> v2: Extend to DP_RECEIVER_CAP_SIZE (Ville)
> 
> Cc: Lyude Paul <lyude@redhat.com>
> Cc: dri-devel@lists.freedesktop.org
> Cc: Manasi Navare <manasi.d.navare@intel.com>
> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Signed-off-by: Jani Nikula <jani.nikula@intel.com>
> ---
>  drivers/gpu/drm/drm_dp_helper.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/drm_dp_helper.c
> b/drivers/gpu/drm/drm_dp_helper.c
> index 9b2a2961fca8..2e74b02ed96b 100644
> --- a/drivers/gpu/drm/drm_dp_helper.c
> +++ b/drivers/gpu/drm/drm_dp_helper.c
> @@ -608,7 +608,7 @@ static u8 drm_dp_downstream_port_count(const u8
> dpcd[DP_RECEIVER_CAP_SIZE])
>  static int drm_dp_read_extended_dpcd_caps(struct drm_dp_aux *aux,
>                                           u8 dpcd[DP_RECEIVER_CAP_SIZE])
>  {
> -       u8 dpcd_ext[6];
> +       u8 dpcd_ext[DP_RECEIVER_CAP_SIZE];
>         int ret;
>  
>         /*

-- 
Cheers,
 Lyude Paul (she/her)
 Software Engineer at Red Hat


WARNING: multiple messages have this Message-ID (diff)
From: Lyude Paul <lyude@redhat.com>
To: Jani Nikula <jani.nikula@intel.com>, intel-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org, ville.syrjala@linux.intel.com,
	 manasi.d.navare@intel.com
Subject: Re: [PATCH v3 02/13] drm/dp: use more of the extended receiver cap
Date: Thu, 09 Sep 2021 12:18:05 -0400	[thread overview]
Message-ID: <282213f032b3dfe10cf7c461083c26b474f09f0f.camel@redhat.com> (raw)
In-Reply-To: <649051cb896821147feee91aab1f2abc523c1353.1631191763.git.jani.nikula@intel.com>

I thought I remembered an issue with this but looked up the previous emails,
and it looks like that this change actually should be safe!

Signed-off-by: Lyude Paul <lyude@redhat.com>

On Thu, 2021-09-09 at 15:51 +0300, Jani Nikula wrote:
> Extend the use of extended receiver cap at 0x2200 to cover
> MAIN_LINK_CHANNEL_CODING_CAP in 0x2206, in case an implementation hides
> the DP 2.0 128b/132b channel encoding cap.
> 
> v2: Extend to DP_RECEIVER_CAP_SIZE (Ville)
> 
> Cc: Lyude Paul <lyude@redhat.com>
> Cc: dri-devel@lists.freedesktop.org
> Cc: Manasi Navare <manasi.d.navare@intel.com>
> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Signed-off-by: Jani Nikula <jani.nikula@intel.com>
> ---
>  drivers/gpu/drm/drm_dp_helper.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/drm_dp_helper.c
> b/drivers/gpu/drm/drm_dp_helper.c
> index 9b2a2961fca8..2e74b02ed96b 100644
> --- a/drivers/gpu/drm/drm_dp_helper.c
> +++ b/drivers/gpu/drm/drm_dp_helper.c
> @@ -608,7 +608,7 @@ static u8 drm_dp_downstream_port_count(const u8
> dpcd[DP_RECEIVER_CAP_SIZE])
>  static int drm_dp_read_extended_dpcd_caps(struct drm_dp_aux *aux,
>                                           u8 dpcd[DP_RECEIVER_CAP_SIZE])
>  {
> -       u8 dpcd_ext[6];
> +       u8 dpcd_ext[DP_RECEIVER_CAP_SIZE];
>         int ret;
>  
>         /*

-- 
Cheers,
 Lyude Paul (she/her)
 Software Engineer at Red Hat


  reply	other threads:[~2021-09-09 16:18 UTC|newest]

Thread overview: 65+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-09 12:51 [PATCH v3 00/13] drm/i915/dp: dp 2.0 enabling prep work Jani Nikula
2021-09-09 12:51 ` [Intel-gfx] " Jani Nikula
2021-09-09 12:51 ` [PATCH v3 01/13] drm/dp: add DP 2.0 UHBR link rate and bw code conversions Jani Nikula
2021-09-09 12:51   ` [Intel-gfx] " Jani Nikula
2021-09-17 12:40   ` Ville Syrjälä
2021-09-17 12:40     ` [Intel-gfx] " Ville Syrjälä
2021-09-09 12:51 ` [PATCH v3 02/13] drm/dp: use more of the extended receiver cap Jani Nikula
2021-09-09 12:51   ` [Intel-gfx] " Jani Nikula
2021-09-09 16:18   ` Lyude Paul [this message]
2021-09-09 16:18     ` Lyude Paul
2021-09-09 16:18     ` Lyude Paul
2021-09-09 16:18       ` [Intel-gfx] " Lyude Paul
2021-09-09 12:51 ` [PATCH v3 03/13] drm/dp: add LTTPR DP 2.0 DPCD addresses Jani Nikula
2021-09-09 12:51   ` [Intel-gfx] " Jani Nikula
2021-09-21 22:58   ` Nathan Chancellor
2021-09-22  0:45     ` Stephen Rothwell
2021-09-22 11:10     ` Jani Nikula
2021-09-22 13:49       ` Alex Deucher
2021-09-22 13:49         ` Alex Deucher
2021-09-22 17:32         ` [PATCH] drm/amd/display: Only define DP 2.0 symbols if not already defined Harry Wentland
2021-09-22 17:32           ` [Intel-gfx] " Harry Wentland
2021-09-09 12:51 ` [PATCH v3 04/13] drm/dp: add helper for extracting adjust 128b/132b TX FFE preset Jani Nikula
2021-09-09 12:51   ` [Intel-gfx] " Jani Nikula
2021-09-09 12:51 ` [PATCH v3 05/13] drm/i915/dg2: add DG2+ TRANS_DDI_FUNC_CTL DP 2.0 128b/132b mode Jani Nikula
2021-09-09 12:51   ` [Intel-gfx] " Jani Nikula
2021-09-17 12:54   ` Ville Syrjälä
2021-09-17 12:54     ` [Intel-gfx] " Ville Syrjälä
2021-09-09 12:51 ` [PATCH v3 06/13] drm/i915/dp: add helper for checking for UHBR link rate Jani Nikula
2021-09-09 12:51   ` [Intel-gfx] " Jani Nikula
2021-09-17 12:41   ` Ville Syrjälä
2021-09-17 12:41     ` [Intel-gfx] " Ville Syrjälä
2021-09-09 12:51 ` [PATCH v3 07/13] drm/i915/dp: use 128b/132b TPS2 for UHBR+ link rates Jani Nikula
2021-09-09 12:51   ` [Intel-gfx] " Jani Nikula
2021-09-09 12:52 ` [PATCH v3 08/13] drm/i915/dp: select 128b/132b channel encoding for UHBR rates Jani Nikula
2021-09-09 12:52   ` [Intel-gfx] " Jani Nikula
2021-09-09 12:52 ` [PATCH v3 09/13] drm/i915/dg2: configure TRANS_DP2_CTL for DP 2.0 Jani Nikula
2021-09-09 12:52   ` [Intel-gfx] " Jani Nikula
2021-09-09 12:52 ` [PATCH v3 10/13] drm/i915/dp: add HAS_DP20 macro Jani Nikula
2021-09-09 12:52   ` [Intel-gfx] " Jani Nikula
2021-09-17 12:42   ` Ville Syrjälä
2021-09-17 12:42     ` [Intel-gfx] " Ville Syrjälä
2021-09-09 12:52 ` [PATCH v3 11/13] drm/i915/dg2: use 128b/132b transcoder DDI mode Jani Nikula
2021-09-09 12:52   ` [Intel-gfx] " Jani Nikula
2021-09-17 12:51   ` Ville Syrjälä
2021-09-17 12:51     ` [Intel-gfx] " Ville Syrjälä
2021-09-09 12:52 ` [PATCH v3 12/13] drm/i915/dg2: configure TRANS_DP2_VFREQ{HIGH, LOW} for 128b/132b Jani Nikula
2021-09-09 12:52   ` [Intel-gfx] " Jani Nikula
2021-09-17 12:53   ` [PATCH v3 12/13] drm/i915/dg2: configure TRANS_DP2_VFREQ{HIGH,LOW} " Ville Syrjälä
2021-09-17 12:53     ` [Intel-gfx] [PATCH v3 12/13] drm/i915/dg2: configure TRANS_DP2_VFREQ{HIGH, LOW} " Ville Syrjälä
2021-09-21  8:44     ` Jani Nikula
2021-09-21  8:44       ` [Intel-gfx] " Jani Nikula
2021-09-09 12:52 ` [PATCH v3 13/13] drm/i915/dg2: update link training " Jani Nikula
2021-09-09 12:52   ` [Intel-gfx] " Jani Nikula
2021-09-09 13:48 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for drm/i915/dp: dp 2.0 enabling prep work (rev3) Patchwork
2021-09-09 13:50 ` [Intel-gfx] ✗ Fi.CI.SPARSE: " Patchwork
2021-09-09 14:17 ` [Intel-gfx] ✓ Fi.CI.BAT: success " Patchwork
2021-09-09 16:25 ` [Intel-gfx] ✗ Fi.CI.IGT: failure " Patchwork
2021-09-17 12:54 ` [PATCH v3 00/13] drm/i915/dp: dp 2.0 enabling prep work Jani Nikula
2021-09-17 12:54   ` [Intel-gfx] " Jani Nikula
2021-09-17 16:56   ` Maxime Ripard
2021-09-17 16:56     ` [Intel-gfx] " Maxime Ripard
2021-09-21  8:44     ` Jani Nikula
2021-09-21  8:44       ` [Intel-gfx] " Jani Nikula
2021-09-22 12:54 ` [Intel-gfx] ✗ Fi.CI.BUILD: failure for drm/i915/dp: dp 2.0 enabling prep work (rev4) Patchwork
2021-09-22 18:24 ` [Intel-gfx] ✗ Fi.CI.BUILD: failure for drm/i915/dp: dp 2.0 enabling prep work (rev5) Patchwork

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