linux-kernel - [PATCH v3] drm/panel/sharp-ls043t1le01: Use

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Message-Id: <20250326-b4-panel-ls043t1le01-v3-1-96c554c0ea2b@redhat.com>
Date: Wed, 26 Mar 2025 23:29:19 -0400
From: Anusha Srivatsa <asrivats@...hat.com>
To: 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>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, 
 Tejas Vipin <tejasvipin76@...il.com>, Doug Anderson <dianders@...omium.org>, 
 Anusha Srivatsa <asrivats@...hat.com>
Subject: [PATCH v3] drm/panel/sharp-ls043t1le01: Use _multi variants

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_seq_multi() instead. This change is manual.

The Coccinelle script is the same as the one in commit c8ba07caaecc
("drm/panel/synaptics-r63353: Use _multi variants")

v2: Use mipi_dsi_write_buffer_multi() in place of
mipi_dsi_dcs_write(). (Dmitry)

v3: add commit details where the same coccinelle script is
used and remove the actual script from commit log.
Use mipi_dsi_dcs_write_seq_multi() for mipi_dsi_dcs_write() (Doug)

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 v3:
- Simplify commit log by adding a reference to a patch that uses the
  same script.
- Simplify code by using a helper that doesnt need additional code
  changes other then using the helper itself.

- Link to v2: https://lore.kernel.org/r/20250324-b4-panel-ls043t1le01-v2-1-e43aedc115be@redhat.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 | 41 +++++++++----------------
 1 file changed, 15 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..36abfa2e65e962af2a08aec3e63ba1077a2c43d4 100644
--- a/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c
+++ b/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c
@@ -36,60 +36,49 @@ 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 };
 
 	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_seq_multi(&dsi_ctx, 0xae,  0x03);
 
 	/* Set both MCU and RGB I/F to 24bpp */
-	ret = mipi_dsi_dcs_set_pixel_format(dsi, MIPI_DCS_PIXEL_FMT_24BIT |
-					(MIPI_DCS_PIXEL_FMT_24BIT << 4));
-	if (ret < 0)
-		return ret;
+	mipi_dsi_dcs_set_pixel_format_multi(&dsi_ctx,
+					    MIPI_DCS_PIXEL_FMT_24BIT |
+					    (MIPI_DCS_PIXEL_FMT_24BIT << 4));
 
-	return 0;
+	return dsi_ctx.accum_err;
 }
 
 static int sharp_nt_panel_on(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 };
 
 	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
 
-	ret = mipi_dsi_dcs_set_display_on(dsi);
-	if (ret < 0)
-		return ret;
+	mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
 
-	return 0;
+	return dsi_ctx.accum_err;
 }
 
 static int sharp_nt_panel_off(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 };
 
 	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
 
-	ret = mipi_dsi_dcs_set_display_off(dsi);
-	if (ret < 0)
-		return ret;
+	mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
 
-	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
-	if (ret < 0)
-		return ret;
+	mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
 
-	return 0;
+	return dsi_ctx.accum_err;
 }
 
 static int sharp_nt_panel_unprepare(struct drm_panel *panel)

---
base-commit: dbe74119ff71c00f2d863a32f72aab2d15e61c39
change-id: 20250316-b4-panel-ls043t1le01-7407b896b7a8

Best regards,
-- 
Anusha Srivatsa <asrivats@...hat.com>