Re: [PATCH] drm/panel: novatek-nt37801: Use mipi_dsi_*_multi() functions

["Nicolás Antinori" <nico.antinori.7@gmail.com>]

On Sat Jul 4, 2026 at 12:59 PM -03, Doug Anderson wrote:
> Hi,
>
> On Wed, Jul 1, 2026 at 5:56 AM Nicolás Antinori
> <nico.antinori.7@gmail.com> wrote:
>>
>> Replace mipi_dsi_* functions with their non-deprecated mipi_dsi_*_multi
>> counterparts. This change reduces error-checking boilerplate and improves
>> readability.
>>
>> Signed-off-by: Nicolás Antinori <nico.antinori.7@gmail.com>
>> ---
>> Note: I Compile-tested this patch since I don't own the panel to test it.
>>
>>  drivers/gpu/drm/panel/panel-novatek-nt37801.c | 16 ++++++----------
>>  1 file changed, 6 insertions(+), 10 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/panel/panel-novatek-nt37801.c b/drivers/gpu/drm/panel/panel-novatek-nt37801.c
>> index d6a37d7e0cc6..daa356bbc182 100644
>> --- a/drivers/gpu/drm/panel/panel-novatek-nt37801.c
>> +++ b/drivers/gpu/drm/panel/panel-novatek-nt37801.c
>> @@ -128,7 +128,8 @@ static int novatek_nt37801_off(struct novatek_nt37801 *ctx)
>>  static int novatek_nt37801_prepare(struct drm_panel *panel)
>>  {
>>         struct novatek_nt37801 *ctx = to_novatek_nt37801(panel);
>> -       struct device *dev = &ctx->dsi->dev;
>> +       struct mipi_dsi_device *dsi = ctx->dsi;
>> +       struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
>>         struct drm_dsc_picture_parameter_set pps;
>>         int ret;
>>
>> @@ -145,15 +146,10 @@ static int novatek_nt37801_prepare(struct drm_panel *panel)
>>
>>         drm_dsc_pps_payload_pack(&pps, &ctx->dsc);
>>
>> -       ret = mipi_dsi_picture_parameter_set(ctx->dsi, &pps);
>> -       if (ret < 0) {
>> -               dev_err(panel->dev, "failed to transmit PPS: %d\n", ret);
>> -               goto err;
>> -       }
>> -
>> -       ret = mipi_dsi_compression_mode(ctx->dsi, true);
>> -       if (ret < 0) {
>> -               dev_err(dev, "failed to enable compression mode: %d\n", ret);
>> +       mipi_dsi_picture_parameter_set_multi(&dsi_ctx, &pps);
>> +       mipi_dsi_compression_mode_multi(&dsi_ctx, true);
>> +       if (dsi_ctx.accum_err) {
>> +               ret = dsi_ctx.accum_err;
>>                 goto err;
>>         }
>
> Sure, this looks pretty good.
>
> Reviewed-by: Douglas Anderson <dianders@chromium.org>
>
> For bonus points, I think you could change novatek_nt37801_on() to
> return "void" and take a "struct mipi_dsi_multi_context". Since
> drm_dsc_pps_payload_pack() is harmless, the function can now just be:
>
>   novatek_nt37801_on(&dsi_ctx);
>   drm_dsc_pps_payload_pack(&pps, &ctx->dsc);
>   mipi_dsi_picture_parameter_set_multi(&dsi_ctx, &pps);
>   mipi_dsi_compression_mode_multi(&dsi_ctx, true);
>   if (dsi_ctx.accum_err) {
>     ...
>   }


Will send a v2 with those changes. Thank you for the suggestion!