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Message-ID: <CAD=FV=XXHOjpZUrb5BGSZ-OqaCdmzqwDnVx5zcnV3BEOyjuByQ@mail.gmail.com>
Date: Tue, 25 Mar 2025 08:33:49 -0700
From: Doug Anderson <dianders@...omium.org>
To: Anusha Srivatsa <asrivats@...hat.com>
Cc: 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 v2] drm/panel/sharp-ls043t1le01: Use _multi variants
Hi,
On Mon, Mar 24, 2025 at 1:31 PM 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. mipi_dsi_dcs_write()
> does not have a corresponding _multi() variant. Replacing it with
> mipi_dsi_dcs_write_buffer_multi() instead. This change is manual
>
> @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;
> }
This is the exact same script as last time, right? Rather than
duplicate it, you can just reference the previous patch that already
landed. You'd say something like:
The Coccinelle script is the same as the one in commit c8ba07caaecc
("drm/panel/synaptics-r63353: Use _multi variants")
> v2: Use mipi_dsi_dcs_write_buffer_multi() in place of
> mipi_dsi_dcs_write(). (Dmitry)
>
> Cc: Maxime Ripard <mripard@...nel.org>
> Cc: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Cc: Tejas Vipin <tejasvipin76@...il.com>
> Cc: Doug Anderson <dianders@...omium.org>
> Signed-off-by: Anusha Srivatsa <asrivats@...hat.com>
> ---
> Changes in v2:
> - While mipi_dsi_dcs_write() does not have a corresponding _multi()
> variant replace it with mipi_dsi_dcs_write_buffer_multi() to have all
> APIs following _multi() usage for easier error handling
>
> - Link to v1: https://lore.kernel.org/r/20250316-b4-panel-ls043t1le01-v1-1-ee38371b0ba0@redhat.com
> ---
> drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c | 42 ++++++++++---------------
> 1 file changed, 16 insertions(+), 26 deletions(-)
>
> diff --git a/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c b/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c
> index 729cbb0d8403ff7c0c4b9d21774909cc298904a2..e3dc99ff711e388660d6d39251876de8cec50dbc 100644
> --- a/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c
> +++ b/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c
> @@ -36,60 +36,50 @@ static inline struct sharp_nt_panel *to_sharp_nt_panel(struct drm_panel *panel)
> static int sharp_nt_panel_init(struct sharp_nt_panel *sharp_nt)
> {
> struct mipi_dsi_device *dsi = sharp_nt->dsi;
> - int ret;
> + struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
>
> + static const u8 d[] = { 0xae, 0x03 };
> dsi->mode_flags |= MIPI_DSI_MODE_LPM;
>
> - ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
> - if (ret < 0)
> - return ret;
> + mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
>
> - msleep(120);
> + mipi_dsi_msleep(&dsi_ctx, 120);
>
> /* Novatek two-lane operation */
> - ret = mipi_dsi_dcs_write(dsi, 0xae, (u8[]){ 0x03 }, 1);
> - if (ret < 0)
> - return ret;
> + mipi_dsi_dcs_write_buffer_multi(&dsi_ctx, d, ARRAY_SIZE(d));
Can't the above just be:
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xae, 0x03);
?
-Doug
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