From: "Tseng, William" <william.tseng@intel.com>
To: Jani Nikula <jani.nikula@linux.intel.com>,
"intel-gfx@lists.freedesktop.org"
<intel-gfx@lists.freedesktop.org>
Cc: "Chiou, Cooper" <cooper.chiou@intel.com>
Subject: Re: [Intel-gfx] [PATCH] drm/i915/dsi: disable lpdt if it is not enabled
Date: Tue, 9 Nov 2021 08:32:38 +0000 [thread overview]
Message-ID: <SJ0PR11MB58940EE621EB1AFF3E99F78EF1929@SJ0PR11MB5894.namprd11.prod.outlook.com> (raw)
In-Reply-To: <87wnlh69gt.fsf@intel.com>
Thank you for your consideration. It's my pleasure.
Regards
William
-----Original Message-----
From: Jani Nikula <jani.nikula@linux.intel.com>
Sent: Tuesday, November 9, 2021 4:05 PM
To: Tseng, William <william.tseng@intel.com>; intel-gfx@lists.freedesktop.org
Cc: Tseng, William <william.tseng@intel.com>; Ville Syrjala <ville.syrjala@linux.intel.com>; Kulkarni, Vandita <vandita.kulkarni@intel.com>; Lee, Shawn C <shawn.c.lee@intel.com>; Chiou, Cooper <cooper.chiou@intel.com>
Subject: Re: [PATCH] drm/i915/dsi: disable lpdt if it is not enabled
On Tue, 09 Nov 2021, William Tseng <william.tseng@intel.com> wrote:
> Avoid setting LP_DATA_TRANSFER when enable_lpdt is false
>
> Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
> Cc: Jani Nikula <jani.nikula@linux.intel.com>
> Cc: Vandita Kulkarni <vandita.kulkarni@intel.com>
> Cc: Lee Shawn C <shawn.c.lee@intel.com>
> Cc: Cooper Chiou <cooper.chiou@intel.com>
> Signed-off-by: William Tseng <william.tseng@intel.com>
> ---
> drivers/gpu/drm/i915/display/icl_dsi.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c
> b/drivers/gpu/drm/i915/display/icl_dsi.c
> index 168c84a74d30..31cea17481b1 100644
> --- a/drivers/gpu/drm/i915/display/icl_dsi.c
> +++ b/drivers/gpu/drm/i915/display/icl_dsi.c
> @@ -183,6 +183,8 @@ static int dsi_send_pkt_hdr(struct intel_dsi_host
> *host,
>
> if (enable_lpdt)
> tmp |= LP_DATA_TRANSFER;
> + else
> + tmp &= ~LP_DATA_TRANSFER;
>
> tmp &= ~(PARAM_WC_MASK | VC_MASK | DT_MASK);
> tmp |= ((packet->header[0] & VC_MASK) << VC_SHIFT);
The read-modify-write we do here is perhaps not the brightnest idea, but the patch at hand probably is the most sensible first fix.
Thanks, pushed to drm-intel-next.
BR,
Jani.
--
Jani Nikula, Intel Open Source Graphics Center
prev parent reply other threads:[~2021-11-09 8:32 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-09 3:41 [Intel-gfx] [PATCH] drm/i915/dsi: disable lpdt if it is not enabled William Tseng
2021-11-09 4:47 ` [Intel-gfx] ✓ Fi.CI.BAT: success for " Patchwork
2021-11-09 6:04 ` [Intel-gfx] ✓ Fi.CI.IGT: " Patchwork
2021-11-09 8:04 ` [Intel-gfx] [PATCH] " Jani Nikula
2021-11-09 8:32 ` Tseng, William [this message]
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