linux-kernel - [PATCH] drm/panel: ebbg-ft8719: transition to mipi

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Message-ID: <20250106041129.114867-1-tejasvipin76@gmail.com>
Date: Mon,  6 Jan 2025 09:41:29 +0530
From: Tejas Vipin <tejasvipin76@...il.com>
To: jo@...amily.in,
	neil.armstrong@...aro.org,
	maarten.lankhorst@...ux.intel.com,
	mripard@...nel.org,
	tzimmermann@...e.de,
	airlied@...il.com,
	simona@...ll.ch
Cc: quic_jesszhan@...cinc.com,
	dianders@...omium.org,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	Tejas Vipin <tejasvipin76@...il.com>
Subject: [PATCH] drm/panel: ebbg-ft8719: transition to mipi_dsi wrapped functions

Changes the ebbg-ft8719 panel to use multi style functions for
improved error handling.

Signed-off-by: Tejas Vipin <tejasvipin76@...il.com>
---
 drivers/gpu/drm/panel/panel-ebbg-ft8719.c | 67 ++++++-----------------
 1 file changed, 16 insertions(+), 51 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-ebbg-ft8719.c b/drivers/gpu/drm/panel/panel-ebbg-ft8719.c
index e85d63a176d0..0bfed0ec0bbc 100644
--- a/drivers/gpu/drm/panel/panel-ebbg-ft8719.c
+++ b/drivers/gpu/drm/panel/panel-ebbg-ft8719.c
@@ -57,65 +57,39 @@ static void ebbg_ft8719_reset(struct ebbg_ft8719 *ctx)
 static int ebbg_ft8719_on(struct ebbg_ft8719 *ctx)
 {
 	struct mipi_dsi_device *dsi = ctx->dsi;
-	struct device *dev = &dsi->dev;
-	int ret;
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
 
 	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
 
-	ret = mipi_dsi_dcs_set_display_brightness(dsi, 0x00ff);
-	if (ret < 0) {
-		dev_err(dev, "Failed to set display brightness: %d\n", ret);
-		return ret;
-	}
+	mipi_dsi_dcs_set_display_brightness_multi(&dsi_ctx, 0x00ff);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x24);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_POWER_SAVE, 0x00);
 
-	mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x24);
-	mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_POWER_SAVE, 0x00);
+	mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
+	mipi_dsi_msleep(&dsi_ctx, 90);
+	mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
 
-	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
-	if (ret < 0) {
-		dev_err(dev, "Failed to exit sleep mode: %d\n", ret);
-		return ret;
-	}
-	msleep(90);
-
-	ret = mipi_dsi_dcs_set_display_on(dsi);
-	if (ret < 0) {
-		dev_err(dev, "Failed to set display on: %d\n", ret);
-		return ret;
-	}
-
-	return 0;
+	return dsi_ctx.accum_err;
 }
 
 static int ebbg_ft8719_off(struct ebbg_ft8719 *ctx)
 {
 	struct mipi_dsi_device *dsi = ctx->dsi;
-	struct device *dev = &dsi->dev;
-	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) {
-		dev_err(dev, "Failed to set display off: %d\n", ret);
-		return ret;
-	}
-	usleep_range(10000, 11000);
-
-	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
-	if (ret < 0) {
-		dev_err(dev, "Failed to enter sleep mode: %d\n", ret);
-		return ret;
-	}
-	msleep(90);
+	mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
+	mipi_dsi_usleep_range(&dsi_ctx, 10000, 11000);
+	mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
+	mipi_dsi_msleep(&dsi_ctx, 90);
 
-	return 0;
+	return dsi_ctx.accum_err;
 }
 
 static int ebbg_ft8719_prepare(struct drm_panel *panel)
 {
 	struct ebbg_ft8719 *ctx = to_ebbg_ft8719(panel);
-	struct device *dev = &ctx->dsi->dev;
 	int ret;
 
 	ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
@@ -126,7 +100,6 @@ static int ebbg_ft8719_prepare(struct drm_panel *panel)
 
 	ret = ebbg_ft8719_on(ctx);
 	if (ret < 0) {
-		dev_err(dev, "Failed to initialize panel: %d\n", ret);
 		gpiod_set_value_cansleep(ctx->reset_gpio, 1);
 		return ret;
 	}
@@ -137,18 +110,10 @@ static int ebbg_ft8719_prepare(struct drm_panel *panel)
 static int ebbg_ft8719_unprepare(struct drm_panel *panel)
 {
 	struct ebbg_ft8719 *ctx = to_ebbg_ft8719(panel);
-	struct device *dev = &ctx->dsi->dev;
-	int ret;
-
-	ret = ebbg_ft8719_off(ctx);
-	if (ret < 0)
-		dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
 
+	ebbg_ft8719_off(ctx);
 	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
-
-	ret = regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
-	if (ret)
-		dev_err(panel->dev, "Failed to disable regulators: %d\n", ret);
+	regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
 
 	return 0;
 }
-- 
2.47.1