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Message-ID: <CAD=FV=WqN0XVse0HvdzeSqi+rJ0X0zoXb718+FBr_44TPbBX5A@mail.gmail.com>
Date: Mon, 24 Mar 2025 09:35:13 -0700
From: Doug Anderson <dianders@...omium.org>
To: Anusha Srivatsa <asrivats@...hat.com>
Cc: Michael Trimarchi <michael@...rulasolutions.com>,
Neil Armstrong <neil.armstrong@...aro.org>, Jessica Zhang <quic_jesszhan@...cinc.com>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>,
Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, Tejas Vipin <tejasvipin76@...il.com>
Subject: Re: [PATCH v4] drm/panel/synaptics-r63353: Use _multi variants
Hi,
On Tue, Mar 18, 2025 at 7:37 AM Anusha Srivatsa <asrivats@...hat.com> wrote:
>
> Move away from using deprecated API and use _multi
> variants if available. Use mipi_dsi_msleep()
> and mipi_dsi_usleep_range() instead of msleep()
> and usleep_range() respectively.
>
> Used Coccinelle to find the _multi variant APIs,
> replacing mpi_dsi_msleep() where necessary and for returning
> dsi_ctx.accum_err in these functions. Manually handled the
> reset step before returning from r63353_panel_activate()
>
> v2: Do not skip the reset in case of error during
> panel activate (Dmitry)
> - Convert all usleep_range()
>
> v3: mipi_dsi_usleep_range() is to be used only when in
> between _multi commands(Doug)
> - Check for error once in the end while using _multi
> variants (Doug)
>
> v4: Change return type of r63353_panel_deactivate() to void (Doug)
>
> @rule_1@
> identifier dsi_var;
> identifier r;
> identifier func;
> type t;
> position p;
> expression dsi_device;
> expression list es;
> @@
> t func(...) {
> ...
> struct mipi_dsi_device *dsi_var = dsi_device;
> +struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi_var };
> <+...
> (
> -r = mipi_dsi_dcs_nop(dsi_var)@p;
> +mipi_dsi_dcs_nop_multi(&dsi_ctx);
> |
> -r = mipi_dsi_dcs_exit_sleep_mode(dsi_var)@p;
> +mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
> |
> -r = mipi_dsi_dcs_enter_sleep_mode(dsi_var)@p;
> +mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
> |
> -r = mipi_dsi_dcs_write_buffer(dsi_var,es)@p;
> +mipi_dsi_dcs_write_buffer_multi(&dsi_ctx,es);
> |
> -r = mipi_dsi_dcs_set_display_off(dsi_var,es)@p;
> +mipi_dsi_dcs_set_display_off_multi(&dsi_ctx,es);
> |
> -r = mipi_dsi_compression_mode_ext(dsi_var,es)@p;
> +mipi_dsi_compression_mode_ext_multi(&dsi_ctx,es);
> |
> -r = mipi_dsi_compression_mode(dsi_var,es)@p;
> +mipi_dsi_compression_mode_multi(&dsi_ctx,es);
> |
> -r = mipi_dsi_picture_parameter_set(dsi_var,es)@p;
> +mipi_dsi_picture_parameter_set_multi(&dsi_ctx,es);
> |
> -r = mipi_dsi_dcs_set_display_on(dsi_var,es)@p;
> +mipi_dsi_dcs_set_display_on_multi(&dsi_ctx,es);
> |
> -r = mipi_dsi_dcs_set_tear_on(dsi_var)@p;
> +mipi_dsi_dcs_set_tear_on_multi(&dsi_ctx);
> |
> -r = mipi_dsi_turn_on_peripheral(dsi_var)@p;
> +mipi_dsi_turn_on_peripheral_multi(&dsi_ctx);
> |
> -r = mipi_dsi_dcs_soft_reset(dsi_var)@p;
> +mipi_dsi_dcs_soft_reset_multi(&dsi_ctx);
> |
> -r = mipi_dsi_dcs_set_display_brightness(dsi_var,es)@p;
> +mipi_dsi_dcs_set_display_brightness_multi(&dsi_ctx,es);
> |
> -r = mipi_dsi_dcs_set_pixel_format(dsi_var,es)@p;
> +mipi_dsi_dcs_set_pixel_format_multi(&dsi_ctx,es);
> |
> -r = mipi_dsi_dcs_set_column_address(dsi_var,es)@p;
> +mipi_dsi_dcs_set_column_address_multi(&dsi_ctx,es);
> |
> -r = mipi_dsi_dcs_set_page_address(dsi_var,es)@p;
> +mipi_dsi_dcs_set_page_address_multi(&dsi_ctx,es);
> |
> -r = mipi_dsi_dcs_set_tear_scanline(dsi_var,es)@p;
> +mipi_dsi_dcs_set_tear_scanline_multi(&dsi_ctx,es);
> )
> -if(r < 0) {
> -...
> -}
> ...+>
> }
>
> @rule_2@
> identifier dsi_var;
> identifier r;
> identifier func;
> type t;
> position p;
> expression dsi_device;
> expression list es;
> @@
> t func(...) {
> ...
> struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi_var };
> <+...
> (
> -r = msleep(es)@p;
> +r = mipi_dsi_msleep(&dsi_ctx,es);
> |
> -msleep(es)@p;
> +mipi_dsi_msleep(&dsi_ctx,es);
> |
> -r = usleep_range(es)@p;
> +r = mipi_dsi_usleep_range(&dsi_ctx,es);
> |
> -usleep_range(es)@p;
> +mipi_dsi_usleep_range(&dsi_ctx,es);
> )
> ...+>
> }
>
> @rule_3@
> identifier dsi_var;
> identifier func;
> type t;
> position p;
> expression list es;
> @@
> t func(...) {
> ...
> struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi_var };
> ...
> -return 0;
> +return dsi_ctx.accum_err;
> }
>
> Cc: Maxime Ripard <mripard@...nel.org>
> Cc: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Cc: Tejas Vipin <tejasvipin76@...il.com>
> Cc: Douglas Anderson <dianders@...omium.org>
> Cc: Neil Armstrong <neil.armstrong@...aro.org>
> Reviewed-by: Douglas Anderson <dianders@...omium.org>
> Signed-off-by: Anusha Srivatsa <asrivats@...hat.com>
> ---
> Previous attempt for this change was addressed in:[1]
> The series did not handle returns properly and still
> used msleep() and usleep_range() API.
> It also collided with an Tejas's similar efforts.
>
> Will be sending the patches per driver instead of
> major haul of changes.
>
> Following [2] for reference.
>
> [1] -> https://patchwork.freedesktop.org/series/144824/
> [2] -> https://lore.kernel.org/dri-devel/20250220045721.145905-1-tejasvipin76@gmail.com/#iZ31drivers:gpu:drm:panel:panel-sony-td4353-jdi.c
> ---
> Changes in v4:
> - Change return type for r63353_panel_deactivate() from int to void
> - Link to v3: https://lore.kernel.org/all/20250314-b4-mipi-synaptic-v1-1-a64ccb5e5c66@redhat.com/
>
> Changes in v3:
> - Modify the script to handle returns and msleeps ()
> - handle reset in case of error properly
>
> - Link to v2: https://lore.kernel.org/all/20250310-mipi-synaptic-1-v2-1-20ee4397c670@redhat.com/
>
> Changes in v2:
> - Handle the reset case properly
> - Handle msleep() and usleep_range()
>
> - Link to v1: https://lore.kernel.org/r/20250305-mipi-synaptic-1-v1-1-92017cd19ef6@redhat.com
> ---
> drivers/gpu/drm/panel/panel-synaptics-r63353.c | 68 +++++++-------------------
> 1 file changed, 19 insertions(+), 49 deletions(-)
Pushed to drm-misc-next:
[1/1] drm/panel/synaptics-r63353: Use _multi variants
commit: c8ba07caaecc622a9922cda49f24790821af8a71
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