linux-kernel - [PATCH] drm/panel: samsung-s6e3fa7: transition to mipi

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240902071019.351158-1-tejasvipin76@gmail.com>
Date: Mon,  2 Sep 2024 12:40:19 +0530
From: Tejas Vipin <tejasvipin76@...il.com>
To: neil.armstrong@...aro.org,
	maarten.lankhorst@...ux.intel.com,
	mripard@...nel.org,
	tzimmermann@...e.de,
	airlied@...il.com,
	daniel@...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: samsung-s6e3fa7: transition to mipi_dsi wrapped functions

Changes the samsung-s6e3fa7 panel to use multi style functions for
improved error handling.

Signed-off-by: Tejas Vipin <tejasvipin76@...il.com>
---
 drivers/gpu/drm/panel/panel-samsung-s6e3fa7.c | 71 ++++++-------------
 1 file changed, 21 insertions(+), 50 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e3fa7.c b/drivers/gpu/drm/panel/panel-samsung-s6e3fa7.c
index 10bc8fb5f1f9..27a059b55ae5 100644
--- a/drivers/gpu/drm/panel/panel-samsung-s6e3fa7.c
+++ b/drivers/gpu/drm/panel/panel-samsung-s6e3fa7.c
@@ -38,57 +38,38 @@ static void s6e3fa7_panel_reset(struct s6e3fa7_panel *ctx)
 	usleep_range(10000, 11000);
 }
 
-static int s6e3fa7_panel_on(struct s6e3fa7_panel *ctx)
+static int s6e3fa7_panel_on(struct mipi_dsi_device *dsi)
 {
-	struct mipi_dsi_device *dsi = ctx->dsi;
-	struct device *dev = &dsi->dev;
-	int ret;
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
 
-	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(120);
+	mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
+	mipi_dsi_msleep(&dsi_ctx, 120);
+	mipi_dsi_dcs_set_tear_on_multi(&dsi_ctx, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
 
-	ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
-	if (ret < 0) {
-		dev_err(dev, "Failed to set tear on: %d\n", ret);
-		return ret;
-	}
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0x5a, 0x5a);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf4,
+				     0xbb, 0x23, 0x19, 0x3a, 0x9f, 0x0f, 0x09, 0xc0,
+				     0x00, 0xb4, 0x37, 0x70, 0x79, 0x69);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0xa5, 0xa5);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x20);
 
-	mipi_dsi_dcs_write_seq(dsi, 0xf0, 0x5a, 0x5a);
-	mipi_dsi_dcs_write_seq(dsi, 0xf4,
-			       0xbb, 0x23, 0x19, 0x3a, 0x9f, 0x0f, 0x09, 0xc0,
-			       0x00, 0xb4, 0x37, 0x70, 0x79, 0x69);
-	mipi_dsi_dcs_write_seq(dsi, 0xf0, 0xa5, 0xa5);
-	mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x20);
+	mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
 
-	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 s6e3fa7_panel_prepare(struct drm_panel *panel)
 {
 	struct s6e3fa7_panel *ctx = to_s6e3fa7_panel(panel);
-	struct device *dev = &ctx->dsi->dev;
 	int ret;
 
 	s6e3fa7_panel_reset(ctx);
 
-	ret = s6e3fa7_panel_on(ctx);
-	if (ret < 0) {
-		dev_err(dev, "Failed to initialize panel: %d\n", ret);
+	ret = s6e3fa7_panel_on(ctx->dsi);
+	if (ret < 0)
 		gpiod_set_value_cansleep(ctx->reset_gpio, 1);
-		return ret;
-	}
 
-	return 0;
+	return ret;
 }
 
 static int s6e3fa7_panel_unprepare(struct drm_panel *panel)
@@ -104,23 +85,13 @@ static int s6e3fa7_panel_disable(struct drm_panel *panel)
 {
 	struct s6e3fa7_panel *ctx = to_s6e3fa7_panel(panel);
 	struct mipi_dsi_device *dsi = ctx->dsi;
-	struct device *dev = &dsi->dev;
-	int ret;
-
-	ret = mipi_dsi_dcs_set_display_off(dsi);
-	if (ret < 0) {
-		dev_err(dev, "Failed to set display off: %d\n", ret);
-		return ret;
-	}
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
 
-	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(120);
+	mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
+	mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
+	mipi_dsi_msleep(&dsi_ctx, 120);
 
-	return 0;
+	return dsi_ctx.accum_err;
 }
 
 static const struct drm_display_mode s6e3fa7_panel_mode = {
-- 
2.46.0