diff mbox series

drm/panel: leadtek-ltk050h3146w: transition to mipi_dsi wrapped functions

Message ID 20241026035928.183454-1-tejasvipin76@gmail.com (mailing list archive)
State New, archived
Headers show
Series drm/panel: leadtek-ltk050h3146w: transition to mipi_dsi wrapped functions | expand

Commit Message

Tejas Vipin Oct. 26, 2024, 3:59 a.m. UTC 
Changes the leadtek-ltk050h3146w panel to use multi style functions for
improved error handling.

Signed-off-by: Tejas Vipin <tejasvipin76@gmail.com>
---
 .../drm/panel/panel-leadtek-ltk050h3146w.c    | 345 +++++++-----------
 1 file changed, 134 insertions(+), 211 deletions(-)

Comments

Doug Anderson Oct. 28, 2024, 6:54 p.m. UTC | #1 
Hi,

On Fri, Oct 25, 2024 at 9:00 PM Tejas Vipin <tejasvipin76@gmail.com> wrote:
>
> @@ -418,79 +398,42 @@ static const struct ltk050h3146w_desc ltk050h3146w_data = {
>                 MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_NO_EOT_PACKET,
>  };
>
> -static int ltk050h3146w_a2_select_page(struct ltk050h3146w *ctx, int page)
> +static void ltk050h3146w_a2_select_page(struct mipi_dsi_multi_context *dsi_ctx, int page)
>  {
> -       struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
> -       u8 d[3] = { 0x98, 0x81, page };
> +       u8 d[4] = { 0xff, 0x98, 0x81, page };
>
> -       return mipi_dsi_dcs_write(dsi, 0xff, d, ARRAY_SIZE(d));
> +       mipi_dsi_dcs_write_buffer_multi(dsi_ctx, d, ARRAY_SIZE(d));

FWIW: the above might be slightly better as:

mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xff, 0x98, 0x81, page);

That would make it more documenting that the 0xff is the "cmd", has
fewer lines of code, and also gets the array marked as "static const"
which might make the compiler slightly more efficient. ;-)

Not really a huge deal, though.

Reviewed-by: Douglas Anderson <dianders@chromium.org>
Tejas Vipin Oct. 30, 2024, 7:24 a.m. UTC | #2 
On 10/29/24 12:24 AM, Doug Anderson wrote:
> Hi,
> 
> On Fri, Oct 25, 2024 at 9:00 PM Tejas Vipin <tejasvipin76@gmail.com> wrote:
>>
>> @@ -418,79 +398,42 @@ static const struct ltk050h3146w_desc ltk050h3146w_data = {
>>                 MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_NO_EOT_PACKET,
>>  };
>>
>> -static int ltk050h3146w_a2_select_page(struct ltk050h3146w *ctx, int page)
>> +static void ltk050h3146w_a2_select_page(struct mipi_dsi_multi_context *dsi_ctx, int page)
>>  {
>> -       struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
>> -       u8 d[3] = { 0x98, 0x81, page };
>> +       u8 d[4] = { 0xff, 0x98, 0x81, page };
>>
>> -       return mipi_dsi_dcs_write(dsi, 0xff, d, ARRAY_SIZE(d));
>> +       mipi_dsi_dcs_write_buffer_multi(dsi_ctx, d, ARRAY_SIZE(d));
> 
> FWIW: the above might be slightly better as:
> 
> mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xff, 0x98, 0x81, page);
> 
> That would make it more documenting that the 0xff is the "cmd", has
> fewer lines of code, and also gets the array marked as "static const"
> which might make the compiler slightly more efficient. ;-)
> 
> Not really a huge deal, though.
>

I did try this initially, but got an error because of page not being a
compile time constant. Not sure how I should handle this.

> Reviewed-by: Douglas Anderson <dianders@chromium.org>
Neil Armstrong Oct. 30, 2024, 4:26 p.m. UTC | #3 
On 30/10/2024 08:24, Tejas Vipin wrote:
> 
> 
> On 10/29/24 12:24 AM, Doug Anderson wrote:
>> Hi,
>>
>> On Fri, Oct 25, 2024 at 9:00 PM Tejas Vipin <tejasvipin76@gmail.com> wrote:
>>>
>>> @@ -418,79 +398,42 @@ static const struct ltk050h3146w_desc ltk050h3146w_data = {
>>>                  MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_NO_EOT_PACKET,
>>>   };
>>>
>>> -static int ltk050h3146w_a2_select_page(struct ltk050h3146w *ctx, int page)
>>> +static void ltk050h3146w_a2_select_page(struct mipi_dsi_multi_context *dsi_ctx, int page)
>>>   {
>>> -       struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
>>> -       u8 d[3] = { 0x98, 0x81, page };
>>> +       u8 d[4] = { 0xff, 0x98, 0x81, page };
>>>
>>> -       return mipi_dsi_dcs_write(dsi, 0xff, d, ARRAY_SIZE(d));
>>> +       mipi_dsi_dcs_write_buffer_multi(dsi_ctx, d, ARRAY_SIZE(d));
>>
>> FWIW: the above might be slightly better as:
>>
>> mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xff, 0x98, 0x81, page);
>>
>> That would make it more documenting that the 0xff is the "cmd", has
>> fewer lines of code, and also gets the array marked as "static const"
>> which might make the compiler slightly more efficient. ;-)
>>
>> Not really a huge deal, though.
>>
> 
> I did try this initially, but got an error because of page not being a
> compile time constant. Not sure how I should handle this.

I think the current version is fine:

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>

> 
>> Reviewed-by: Douglas Anderson <dianders@chromium.org>
>
Doug Anderson Oct. 30, 2024, 5:50 p.m. UTC | #4 
Hi,

On Wed, Oct 30, 2024 at 12:24 AM Tejas Vipin <tejasvipin76@gmail.com> wrote:
>
> On 10/29/24 12:24 AM, Doug Anderson wrote:
> > Hi,
> >
> > On Fri, Oct 25, 2024 at 9:00 PM Tejas Vipin <tejasvipin76@gmail.com> wrote:
> >>
> >> @@ -418,79 +398,42 @@ static const struct ltk050h3146w_desc ltk050h3146w_data = {
> >>                 MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_NO_EOT_PACKET,
> >>  };
> >>
> >> -static int ltk050h3146w_a2_select_page(struct ltk050h3146w *ctx, int page)
> >> +static void ltk050h3146w_a2_select_page(struct mipi_dsi_multi_context *dsi_ctx, int page)
> >>  {
> >> -       struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
> >> -       u8 d[3] = { 0x98, 0x81, page };
> >> +       u8 d[4] = { 0xff, 0x98, 0x81, page };
> >>
> >> -       return mipi_dsi_dcs_write(dsi, 0xff, d, ARRAY_SIZE(d));
> >> +       mipi_dsi_dcs_write_buffer_multi(dsi_ctx, d, ARRAY_SIZE(d));
> >
> > FWIW: the above might be slightly better as:
> >
> > mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xff, 0x98, 0x81, page);
> >
> > That would make it more documenting that the 0xff is the "cmd", has
> > fewer lines of code, and also gets the array marked as "static const"
> > which might make the compiler slightly more efficient. ;-)
> >
> > Not really a huge deal, though.
> >
>
> I did try this initially, but got an error because of page not being a
> compile time constant. Not sure how I should handle this.

Ha, that makes sense! It can't be "static const" because that means
that there's one storage location that's never changing and that's
just not true. I tried to see if there was some way to make the
mipi_dsi_dcs_write_seq_multi() smarter and have it detect if
everything is constant but I couldn't find any way to do that. The
__builtin_constant_p() trick doesn't seem to work with more than one
number.

So I think what you have is fine then. If this becomes common I guess
we can make an alternative version of mipi_dsi_dcs_write_seq_multi()
that just uses "const" instead of "static const".

I'll plan to apply your patch next week unless someone beats me to it.

-Doug
Neil Armstrong Oct. 31, 2024, 9:34 a.m. UTC | #5 
On 30/10/2024 18:50, Doug Anderson wrote:
> Hi,
> 
> On Wed, Oct 30, 2024 at 12:24 AM Tejas Vipin <tejasvipin76@gmail.com> wrote:
>>
>> On 10/29/24 12:24 AM, Doug Anderson wrote:
>>> Hi,
>>>
>>> On Fri, Oct 25, 2024 at 9:00 PM Tejas Vipin <tejasvipin76@gmail.com> wrote:
>>>>
>>>> @@ -418,79 +398,42 @@ static const struct ltk050h3146w_desc ltk050h3146w_data = {
>>>>                  MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_NO_EOT_PACKET,
>>>>   };
>>>>
>>>> -static int ltk050h3146w_a2_select_page(struct ltk050h3146w *ctx, int page)
>>>> +static void ltk050h3146w_a2_select_page(struct mipi_dsi_multi_context *dsi_ctx, int page)
>>>>   {
>>>> -       struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
>>>> -       u8 d[3] = { 0x98, 0x81, page };
>>>> +       u8 d[4] = { 0xff, 0x98, 0x81, page };
>>>>
>>>> -       return mipi_dsi_dcs_write(dsi, 0xff, d, ARRAY_SIZE(d));
>>>> +       mipi_dsi_dcs_write_buffer_multi(dsi_ctx, d, ARRAY_SIZE(d));
>>>
>>> FWIW: the above might be slightly better as:
>>>
>>> mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xff, 0x98, 0x81, page);
>>>
>>> That would make it more documenting that the 0xff is the "cmd", has
>>> fewer lines of code, and also gets the array marked as "static const"
>>> which might make the compiler slightly more efficient. ;-)
>>>
>>> Not really a huge deal, though.
>>>
>>
>> I did try this initially, but got an error because of page not being a
>> compile time constant. Not sure how I should handle this.
> 
> Ha, that makes sense! It can't be "static const" because that means
> that there's one storage location that's never changing and that's
> just not true. I tried to see if there was some way to make the
> mipi_dsi_dcs_write_seq_multi() smarter and have it detect if
> everything is constant but I couldn't find any way to do that. The
> __builtin_constant_p() trick doesn't seem to work with more than one
> number.
> 
> So I think what you have is fine then. If this becomes common I guess
> we can make an alternative version of mipi_dsi_dcs_write_seq_multi()
> that just uses "const" instead of "static const".
> 
> I'll plan to apply your patch next week unless someone beats me to it.

I'll apply it today so it can go in v6.13 :-)

Neil

> 
> -Doug
Neil Armstrong Oct. 31, 2024, 10:18 a.m. UTC | #6 
Hi,

On Sat, 26 Oct 2024 09:29:28 +0530, Tejas Vipin wrote:
> Changes the leadtek-ltk050h3146w panel to use multi style functions for
> improved error handling.
> 
> 

Thanks, Applied to https://gitlab.freedesktop.org/drm/misc/kernel.git (drm-misc-next)

[1/1] drm/panel: leadtek-ltk050h3146w: transition to mipi_dsi wrapped functions
      https://gitlab.freedesktop.org/drm/misc/kernel/-/commit/766515ab5bba959fc8036e77e875a672916ba8fc
diff mbox series

Patch

diff --git a/drivers/gpu/drm/panel/panel-leadtek-ltk050h3146w.c b/drivers/gpu/drm/panel/panel-leadtek-ltk050h3146w.c
index 292aa26a456d..77f74e6c467e 100644
--- a/drivers/gpu/drm/panel/panel-leadtek-ltk050h3146w.c
+++ b/drivers/gpu/drm/panel/panel-leadtek-ltk050h3146w.c
@@ -26,7 +26,7 @@  struct ltk050h3146w;
 struct ltk050h3146w_desc {
 	const unsigned long mode_flags;
 	const struct drm_display_mode *mode;
-	int (*init)(struct ltk050h3146w *ctx);
+	void (*init)(struct mipi_dsi_multi_context *dsi_ctx);
 };
 
 struct ltk050h3146w {
@@ -243,67 +243,57 @@  struct ltk050h3146w *panel_to_ltk050h3146w(struct drm_panel *panel)
 	return container_of(panel, struct ltk050h3146w, panel);
 }
 
-static int ltk050h3148w_init_sequence(struct ltk050h3146w *ctx)
+static void ltk050h3148w_init_sequence(struct mipi_dsi_multi_context *dsi_ctx)
 {
-	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
-	int ret;
-
 	/*
 	 * Init sequence was supplied by the panel vendor without much
 	 * documentation.
 	 */
-	mipi_dsi_dcs_write_seq(dsi, 0xb9, 0xff, 0x83, 0x94);
-	mipi_dsi_dcs_write_seq(dsi, 0xb1, 0x50, 0x15, 0x75, 0x09, 0x32, 0x44,
-			       0x71, 0x31, 0x55, 0x2f);
-	mipi_dsi_dcs_write_seq(dsi, 0xba, 0x63, 0x03, 0x68, 0x6b, 0xb2, 0xc0);
-	mipi_dsi_dcs_write_seq(dsi, 0xd2, 0x88);
-	mipi_dsi_dcs_write_seq(dsi, 0xb2, 0x00, 0x80, 0x64, 0x10, 0x07);
-	mipi_dsi_dcs_write_seq(dsi, 0xb4, 0x05, 0x70, 0x05, 0x70, 0x01, 0x70,
-			       0x01, 0x0c, 0x86, 0x75, 0x00, 0x3f, 0x01, 0x74,
-			       0x01, 0x74, 0x01, 0x74, 0x01, 0x0c, 0x86);
-	mipi_dsi_dcs_write_seq(dsi, 0xd3, 0x00, 0x00, 0x07, 0x07, 0x40, 0x1e,
-			       0x08, 0x00, 0x32, 0x10, 0x08, 0x00, 0x08, 0x54,
-			       0x15, 0x10, 0x05, 0x04, 0x02, 0x12, 0x10, 0x05,
-			       0x07, 0x33, 0x34, 0x0c, 0x0c, 0x37, 0x10, 0x07,
-			       0x17, 0x11, 0x40);
-	mipi_dsi_dcs_write_seq(dsi, 0xd5, 0x19, 0x19, 0x18, 0x18, 0x1b, 0x1b,
-			       0x1a, 0x1a, 0x04, 0x05, 0x06, 0x07, 0x00, 0x01,
-			       0x02, 0x03, 0x20, 0x21, 0x18, 0x18, 0x22, 0x23,
-			       0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
-			       0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
-			       0x18, 0x18, 0x18, 0x18, 0x18, 0x18);
-	mipi_dsi_dcs_write_seq(dsi, 0xd6, 0x18, 0x18, 0x19, 0x19, 0x1b, 0x1b,
-			       0x1a, 0x1a, 0x03, 0x02, 0x01, 0x00, 0x07, 0x06,
-			       0x05, 0x04, 0x23, 0x22, 0x18, 0x18, 0x21, 0x20,
-			       0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
-			       0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
-			       0x18, 0x18, 0x18, 0x18, 0x18, 0x18);
-	mipi_dsi_dcs_write_seq(dsi, 0xe0, 0x00, 0x03, 0x09, 0x11, 0x11, 0x14,
-			       0x18, 0x16, 0x2e, 0x3d, 0x4d, 0x4d, 0x58, 0x6c,
-			       0x72, 0x78, 0x88, 0x8b, 0x86, 0xa4, 0xb2, 0x58,
-			       0x55, 0x59, 0x5b, 0x5d, 0x60, 0x64, 0x7f, 0x00,
-			       0x03, 0x09, 0x0f, 0x11, 0x14, 0x18, 0x16, 0x2e,
-			       0x3d, 0x4d, 0x4d, 0x58, 0x6d, 0x73, 0x78, 0x88,
-			       0x8b, 0x87, 0xa5, 0xb2, 0x58, 0x55, 0x58, 0x5b,
-			       0x5d, 0x61, 0x65, 0x7f);
-	mipi_dsi_dcs_write_seq(dsi, 0xcc, 0x0b);
-	mipi_dsi_dcs_write_seq(dsi, 0xc0, 0x1f, 0x31);
-	mipi_dsi_dcs_write_seq(dsi, 0xb6, 0xc4, 0xc4);
-	mipi_dsi_dcs_write_seq(dsi, 0xbd, 0x01);
-	mipi_dsi_dcs_write_seq(dsi, 0xb1, 0x00);
-	mipi_dsi_dcs_write_seq(dsi, 0xbd, 0x00);
-	mipi_dsi_dcs_write_seq(dsi, 0xc6, 0xef);
-	mipi_dsi_dcs_write_seq(dsi, 0xd4, 0x02);
-
-	ret = mipi_dsi_dcs_set_tear_on(dsi, 1);
-	if (ret < 0) {
-		dev_err(ctx->dev, "failed to set tear on: %d\n", ret);
-		return ret;
-	}
-
-	msleep(60);
-
-	return 0;
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb9, 0xff, 0x83, 0x94);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb1, 0x50, 0x15, 0x75, 0x09, 0x32, 0x44,
+				     0x71, 0x31, 0x55, 0x2f);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xba, 0x63, 0x03, 0x68, 0x6b, 0xb2, 0xc0);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xd2, 0x88);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb2, 0x00, 0x80, 0x64, 0x10, 0x07);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb4, 0x05, 0x70, 0x05, 0x70, 0x01, 0x70,
+				     0x01, 0x0c, 0x86, 0x75, 0x00, 0x3f, 0x01, 0x74,
+				     0x01, 0x74, 0x01, 0x74, 0x01, 0x0c, 0x86);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xd3, 0x00, 0x00, 0x07, 0x07, 0x40, 0x1e,
+				     0x08, 0x00, 0x32, 0x10, 0x08, 0x00, 0x08, 0x54,
+				     0x15, 0x10, 0x05, 0x04, 0x02, 0x12, 0x10, 0x05,
+				     0x07, 0x33, 0x34, 0x0c, 0x0c, 0x37, 0x10, 0x07,
+				     0x17, 0x11, 0x40);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xd5, 0x19, 0x19, 0x18, 0x18, 0x1b, 0x1b,
+				     0x1a, 0x1a, 0x04, 0x05, 0x06, 0x07, 0x00, 0x01,
+				     0x02, 0x03, 0x20, 0x21, 0x18, 0x18, 0x22, 0x23,
+				     0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
+				     0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
+				     0x18, 0x18, 0x18, 0x18, 0x18, 0x18);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xd6, 0x18, 0x18, 0x19, 0x19, 0x1b, 0x1b,
+				     0x1a, 0x1a, 0x03, 0x02, 0x01, 0x00, 0x07, 0x06,
+				     0x05, 0x04, 0x23, 0x22, 0x18, 0x18, 0x21, 0x20,
+				     0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
+				     0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
+				     0x18, 0x18, 0x18, 0x18, 0x18, 0x18);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe0, 0x00, 0x03, 0x09, 0x11, 0x11, 0x14,
+				     0x18, 0x16, 0x2e, 0x3d, 0x4d, 0x4d, 0x58, 0x6c,
+				     0x72, 0x78, 0x88, 0x8b, 0x86, 0xa4, 0xb2, 0x58,
+				     0x55, 0x59, 0x5b, 0x5d, 0x60, 0x64, 0x7f, 0x00,
+				     0x03, 0x09, 0x0f, 0x11, 0x14, 0x18, 0x16, 0x2e,
+				     0x3d, 0x4d, 0x4d, 0x58, 0x6d, 0x73, 0x78, 0x88,
+				     0x8b, 0x87, 0xa5, 0xb2, 0x58, 0x55, 0x58, 0x5b,
+				     0x5d, 0x61, 0x65, 0x7f);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xcc, 0x0b);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xc0, 0x1f, 0x31);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb6, 0xc4, 0xc4);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x01);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb1, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xc6, 0xef);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xd4, 0x02);
+
+	mipi_dsi_dcs_set_tear_on_multi(dsi_ctx, 1);
+	mipi_dsi_msleep(dsi_ctx, 60);
 }
 
 static const struct drm_display_mode ltk050h3148w_mode = {
@@ -327,74 +317,64 @@  static const struct ltk050h3146w_desc ltk050h3148w_data = {
 		      MIPI_DSI_MODE_VIDEO_BURST,
 };
 
-static int ltk050h3146w_init_sequence(struct ltk050h3146w *ctx)
+static void ltk050h3146w_init_sequence(struct mipi_dsi_multi_context *dsi_ctx)
 {
-	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
-	int ret;
-
 	/*
 	 * Init sequence was supplied by the panel vendor without much
 	 * documentation.
 	 */
-	mipi_dsi_dcs_write_seq(dsi, 0xdf, 0x93, 0x65, 0xf8);
-	mipi_dsi_dcs_write_seq(dsi, 0xb0, 0x01, 0x03, 0x02, 0x00, 0x64, 0x06,
-			       0x01);
-	mipi_dsi_dcs_write_seq(dsi, 0xb2, 0x00, 0xb5);
-	mipi_dsi_dcs_write_seq(dsi, 0xb3, 0x00, 0xb5);
-	mipi_dsi_dcs_write_seq(dsi, 0xb7, 0x00, 0xbf, 0x00, 0x00, 0xbf, 0x00);
-
-	mipi_dsi_dcs_write_seq(dsi, 0xb9, 0x00, 0xc4, 0x23, 0x07);
-	mipi_dsi_dcs_write_seq(dsi, 0xbb, 0x02, 0x01, 0x24, 0x00, 0x28, 0x0f,
-			       0x28, 0x04, 0xcc, 0xcc, 0xcc);
-	mipi_dsi_dcs_write_seq(dsi, 0xbc, 0x0f, 0x04);
-	mipi_dsi_dcs_write_seq(dsi, 0xbe, 0x1e, 0xf2);
-	mipi_dsi_dcs_write_seq(dsi, 0xc0, 0x26, 0x03);
-	mipi_dsi_dcs_write_seq(dsi, 0xc1, 0x00, 0x12);
-	mipi_dsi_dcs_write_seq(dsi, 0xc3, 0x04, 0x02, 0x02, 0x76, 0x01, 0x80,
-			       0x80);
-	mipi_dsi_dcs_write_seq(dsi, 0xc4, 0x24, 0x80, 0xb4, 0x81, 0x12, 0x0f,
-			       0x16, 0x00, 0x00);
-	mipi_dsi_dcs_write_seq(dsi, 0xc8, 0x7f, 0x72, 0x67, 0x5d, 0x5d, 0x50,
-			       0x56, 0x41, 0x59, 0x57, 0x55, 0x70, 0x5b, 0x5f,
-			       0x4f, 0x47, 0x38, 0x23, 0x08, 0x7f, 0x72, 0x67,
-			       0x5d, 0x5d, 0x50, 0x56, 0x41, 0x59, 0x57, 0x55,
-			       0x70, 0x5b, 0x5f, 0x4f, 0x47, 0x38, 0x23, 0x08);
-	mipi_dsi_dcs_write_seq(dsi, 0xd0, 0x1e, 0x1f, 0x57, 0x58, 0x48, 0x4a,
-			       0x44, 0x46, 0x40, 0x1f, 0x42, 0x1f, 0x1f, 0x1f,
-			       0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f);
-	mipi_dsi_dcs_write_seq(dsi, 0xd1, 0x1e, 0x1f, 0x57, 0x58, 0x49, 0x4b,
-			       0x45, 0x47, 0x41, 0x1f, 0x43, 0x1f, 0x1f, 0x1f,
-			       0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f);
-	mipi_dsi_dcs_write_seq(dsi, 0xd2, 0x1f, 0x1e, 0x17, 0x18, 0x07, 0x05,
-			       0x0b, 0x09, 0x03, 0x1f, 0x01, 0x1f, 0x1f, 0x1f,
-			       0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f);
-	mipi_dsi_dcs_write_seq(dsi, 0xd3, 0x1f, 0x1e, 0x17, 0x18, 0x06, 0x04,
-			       0x0a, 0x08, 0x02, 0x1f, 0x00, 0x1f, 0x1f, 0x1f,
-			       0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f);
-	mipi_dsi_dcs_write_seq(dsi, 0xd4, 0x00, 0x00, 0x00, 0x0c, 0x06, 0x20,
-			       0x01, 0x02, 0x00, 0x60, 0x15, 0xb0, 0x30, 0x03,
-			       0x04, 0x00, 0x60, 0x72, 0x0a, 0x00, 0x60, 0x08);
-	mipi_dsi_dcs_write_seq(dsi, 0xd5, 0x00, 0x06, 0x06, 0x00, 0x30, 0x00,
-			       0x00, 0x00, 0x00, 0x00, 0xbc, 0x50, 0x00, 0x05,
-			       0x21, 0x00, 0x60);
-	mipi_dsi_dcs_write_seq(dsi, 0xdd, 0x2c, 0xa3, 0x00);
-	mipi_dsi_dcs_write_seq(dsi, 0xde, 0x02);
-	mipi_dsi_dcs_write_seq(dsi, 0xb2, 0x32, 0x1c);
-	mipi_dsi_dcs_write_seq(dsi, 0xb7, 0x3b, 0x70, 0x00, 0x04);
-	mipi_dsi_dcs_write_seq(dsi, 0xc1, 0x11);
-	mipi_dsi_dcs_write_seq(dsi, 0xbb, 0x21, 0x22, 0x23, 0x24, 0x36, 0x37);
-	mipi_dsi_dcs_write_seq(dsi, 0xc2, 0x20, 0x38, 0x1e, 0x84);
-	mipi_dsi_dcs_write_seq(dsi, 0xde, 0x00);
-
-	ret = mipi_dsi_dcs_set_tear_on(dsi, 1);
-	if (ret < 0) {
-		dev_err(ctx->dev, "failed to set tear on: %d\n", ret);
-		return ret;
-	}
-
-	msleep(60);
-
-	return 0;
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xdf, 0x93, 0x65, 0xf8);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb0, 0x01, 0x03, 0x02, 0x00, 0x64, 0x06,
+				     0x01);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb2, 0x00, 0xb5);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb3, 0x00, 0xb5);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb7, 0x00, 0xbf, 0x00, 0x00, 0xbf, 0x00);
+
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb9, 0x00, 0xc4, 0x23, 0x07);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbb, 0x02, 0x01, 0x24, 0x00, 0x28, 0x0f,
+				     0x28, 0x04, 0xcc, 0xcc, 0xcc);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbc, 0x0f, 0x04);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbe, 0x1e, 0xf2);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xc0, 0x26, 0x03);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xc1, 0x00, 0x12);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xc3, 0x04, 0x02, 0x02, 0x76, 0x01, 0x80,
+				     0x80);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xc4, 0x24, 0x80, 0xb4, 0x81, 0x12, 0x0f,
+				     0x16, 0x00, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xc8, 0x7f, 0x72, 0x67, 0x5d, 0x5d, 0x50,
+				     0x56, 0x41, 0x59, 0x57, 0x55, 0x70, 0x5b, 0x5f,
+				     0x4f, 0x47, 0x38, 0x23, 0x08, 0x7f, 0x72, 0x67,
+				     0x5d, 0x5d, 0x50, 0x56, 0x41, 0x59, 0x57, 0x55,
+				     0x70, 0x5b, 0x5f, 0x4f, 0x47, 0x38, 0x23, 0x08);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xd0, 0x1e, 0x1f, 0x57, 0x58, 0x48, 0x4a,
+				     0x44, 0x46, 0x40, 0x1f, 0x42, 0x1f, 0x1f, 0x1f,
+				     0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xd1, 0x1e, 0x1f, 0x57, 0x58, 0x49, 0x4b,
+				     0x45, 0x47, 0x41, 0x1f, 0x43, 0x1f, 0x1f, 0x1f,
+				     0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xd2, 0x1f, 0x1e, 0x17, 0x18, 0x07, 0x05,
+				     0x0b, 0x09, 0x03, 0x1f, 0x01, 0x1f, 0x1f, 0x1f,
+				     0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xd3, 0x1f, 0x1e, 0x17, 0x18, 0x06, 0x04,
+				     0x0a, 0x08, 0x02, 0x1f, 0x00, 0x1f, 0x1f, 0x1f,
+				     0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xd4, 0x00, 0x00, 0x00, 0x0c, 0x06, 0x20,
+				     0x01, 0x02, 0x00, 0x60, 0x15, 0xb0, 0x30, 0x03,
+				     0x04, 0x00, 0x60, 0x72, 0x0a, 0x00, 0x60, 0x08);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xd5, 0x00, 0x06, 0x06, 0x00, 0x30, 0x00,
+				     0x00, 0x00, 0x00, 0x00, 0xbc, 0x50, 0x00, 0x05,
+				     0x21, 0x00, 0x60);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xdd, 0x2c, 0xa3, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xde, 0x02);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb2, 0x32, 0x1c);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb7, 0x3b, 0x70, 0x00, 0x04);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xc1, 0x11);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbb, 0x21, 0x22, 0x23, 0x24, 0x36, 0x37);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xc2, 0x20, 0x38, 0x1e, 0x84);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xde, 0x00);
+
+	mipi_dsi_dcs_set_tear_on_multi(dsi_ctx, 1);
+	mipi_dsi_msleep(dsi_ctx, 60);
 }
 
 static const struct drm_display_mode ltk050h3146w_mode = {
@@ -418,79 +398,42 @@  static const struct ltk050h3146w_desc ltk050h3146w_data = {
 		MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_NO_EOT_PACKET,
 };
 
-static int ltk050h3146w_a2_select_page(struct ltk050h3146w *ctx, int page)
+static void ltk050h3146w_a2_select_page(struct mipi_dsi_multi_context *dsi_ctx, int page)
 {
-	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
-	u8 d[3] = { 0x98, 0x81, page };
+	u8 d[4] = { 0xff, 0x98, 0x81, page };
 
-	return mipi_dsi_dcs_write(dsi, 0xff, d, ARRAY_SIZE(d));
+	mipi_dsi_dcs_write_buffer_multi(dsi_ctx, d, ARRAY_SIZE(d));
 }
 
-static int ltk050h3146w_a2_write_page(struct ltk050h3146w *ctx, int page,
+static void ltk050h3146w_a2_write_page(struct mipi_dsi_multi_context *dsi_ctx, int page,
 				      const struct ltk050h3146w_cmd *cmds,
 				      int num)
 {
-	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
-	int i, ret;
+	ltk050h3146w_a2_select_page(dsi_ctx, page);
 
-	ret = ltk050h3146w_a2_select_page(ctx, page);
-	if (ret < 0) {
-		dev_err(ctx->dev, "failed to select page %d: %d\n", page, ret);
-		return ret;
-	}
-
-	for (i = 0; i < num; i++) {
-		ret = mipi_dsi_generic_write(dsi, &cmds[i],
+	for (int i = 0; i < num; i++)
+		mipi_dsi_generic_write_multi(dsi_ctx, &cmds[i],
 					     sizeof(struct ltk050h3146w_cmd));
-		if (ret < 0) {
-			dev_err(ctx->dev, "failed to write page %d init cmds: %d\n", page, ret);
-			return ret;
-		}
-	}
-
-	return 0;
 }
 
-static int ltk050h3146w_a2_init_sequence(struct ltk050h3146w *ctx)
+static void ltk050h3146w_a2_init_sequence(struct mipi_dsi_multi_context *dsi_ctx)
 {
-	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
-	int ret;
-
 	/*
 	 * Init sequence was supplied by the panel vendor without much
 	 * documentation.
 	 */
-	ret = ltk050h3146w_a2_write_page(ctx, 3, page3_cmds,
+	ltk050h3146w_a2_write_page(dsi_ctx, 3, page3_cmds,
 					 ARRAY_SIZE(page3_cmds));
-	if (ret < 0)
-		return ret;
-
-	ret = ltk050h3146w_a2_write_page(ctx, 4, page4_cmds,
+	ltk050h3146w_a2_write_page(dsi_ctx, 4, page4_cmds,
 					 ARRAY_SIZE(page4_cmds));
-	if (ret < 0)
-		return ret;
-
-	ret = ltk050h3146w_a2_write_page(ctx, 1, page1_cmds,
+	ltk050h3146w_a2_write_page(dsi_ctx, 1, page1_cmds,
 					 ARRAY_SIZE(page1_cmds));
-	if (ret < 0)
-		return ret;
-
-	ret = ltk050h3146w_a2_select_page(ctx, 0);
-	if (ret < 0) {
-		dev_err(ctx->dev, "failed to select page 0: %d\n", ret);
-		return ret;
-	}
+	ltk050h3146w_a2_select_page(dsi_ctx, 0);
 
 	/* vendor code called this without param, where there should be one */
-	ret = mipi_dsi_dcs_set_tear_on(dsi, 0);
-	if (ret < 0) {
-		dev_err(ctx->dev, "failed to set tear on: %d\n", ret);
-		return ret;
-	}
-
-	msleep(60);
+	mipi_dsi_dcs_set_tear_on_multi(dsi_ctx, 0);
 
-	return 0;
+	mipi_dsi_msleep(dsi_ctx, 60);
 }
 
 static const struct drm_display_mode ltk050h3146w_a2_mode = {
@@ -518,19 +461,12 @@  static int ltk050h3146w_unprepare(struct drm_panel *panel)
 {
 	struct ltk050h3146w *ctx = panel_to_ltk050h3146w(panel);
 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
-	int ret;
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
 
-	ret = mipi_dsi_dcs_set_display_off(dsi);
-	if (ret < 0) {
-		dev_err(ctx->dev, "failed to set display off: %d\n", ret);
-		return ret;
-	}
-
-	mipi_dsi_dcs_enter_sleep_mode(dsi);
-	if (ret < 0) {
-		dev_err(ctx->dev, "failed to enter sleep mode: %d\n", ret);
-		return ret;
-	}
+	mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
+	mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
+	if (dsi_ctx.accum_err)
+		return dsi_ctx.accum_err;
 
 	regulator_disable(ctx->iovcc);
 	regulator_disable(ctx->vci);
@@ -542,17 +478,17 @@  static int ltk050h3146w_prepare(struct drm_panel *panel)
 {
 	struct ltk050h3146w *ctx = panel_to_ltk050h3146w(panel);
 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
-	int ret;
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
 
 	dev_dbg(ctx->dev, "Resetting the panel\n");
-	ret = regulator_enable(ctx->vci);
-	if (ret < 0) {
-		dev_err(ctx->dev, "Failed to enable vci supply: %d\n", ret);
-		return ret;
+	dsi_ctx.accum_err = regulator_enable(ctx->vci);
+	if (dsi_ctx.accum_err) {
+		dev_err(ctx->dev, "Failed to enable vci supply: %d\n", dsi_ctx.accum_err);
+		return dsi_ctx.accum_err;
 	}
-	ret = regulator_enable(ctx->iovcc);
-	if (ret < 0) {
-		dev_err(ctx->dev, "Failed to enable iovcc supply: %d\n", ret);
+	dsi_ctx.accum_err = regulator_enable(ctx->iovcc);
+	if (dsi_ctx.accum_err) {
+		dev_err(ctx->dev, "Failed to enable iovcc supply: %d\n", dsi_ctx.accum_err);
 		goto disable_vci;
 	}
 
@@ -561,28 +497,15 @@  static int ltk050h3146w_prepare(struct drm_panel *panel)
 	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
 	msleep(20);
 
-	ret = ctx->panel_desc->init(ctx);
-	if (ret < 0) {
-		dev_err(ctx->dev, "Panel init sequence failed: %d\n", ret);
-		goto disable_iovcc;
-	}
-
-	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
-	if (ret < 0) {
-		dev_err(ctx->dev, "Failed to exit sleep mode: %d\n", ret);
-		goto disable_iovcc;
-	}
-
+	ctx->panel_desc->init(&dsi_ctx);
+	mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
 	/* T9: 120ms */
-	msleep(120);
+	mipi_dsi_msleep(&dsi_ctx, 120);
+	mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
+	mipi_dsi_msleep(&dsi_ctx, 50);
 
-	ret = mipi_dsi_dcs_set_display_on(dsi);
-	if (ret < 0) {
-		dev_err(ctx->dev, "Failed to set display on: %d\n", ret);
+	if (dsi_ctx.accum_err)
 		goto disable_iovcc;
-	}
-
-	msleep(50);
 
 	return 0;
 
@@ -590,7 +513,7 @@  static int ltk050h3146w_prepare(struct drm_panel *panel)
 	regulator_disable(ctx->iovcc);
 disable_vci:
 	regulator_disable(ctx->vci);
-	return ret;
+	return dsi_ctx.accum_err;
 }
 
 static int ltk050h3146w_get_modes(struct drm_panel *panel,