[PATCH v2 2/2] drm/panel: jdi-fhd-r63452: transition to mipi_dsi wrapped functions

[Tejas Vipin]

Changes the jdi-fhd-r63452 panel to use multi style functions for
improved error handling.

Signed-off-by: Tejas Vipin <tejasvipin76@xxxxxxxxx>
---
 drivers/gpu/drm/panel/panel-jdi-fhd-r63452.c | 150 ++++++-------------
 1 file changed, 49 insertions(+), 101 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-jdi-fhd-r63452.c b/drivers/gpu/drm/panel/panel-jdi-fhd-r63452.c
index 483dc88d16d8..9ec567b4a8e2 100644
--- a/drivers/gpu/drm/panel/panel-jdi-fhd-r63452.c
+++ b/drivers/gpu/drm/panel/panel-jdi-fhd-r63452.c
@@ -41,142 +41,90 @@ static void jdi_fhd_r63452_reset(struct jdi_fhd_r63452 *ctx)
 static int jdi_fhd_r63452_on(struct jdi_fhd_r63452 *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;
 
-	mipi_dsi_generic_write_seq(dsi, 0xb0, 0x00);
-	mipi_dsi_generic_write_seq(dsi, 0xd6, 0x01);
-	mipi_dsi_generic_write_seq(dsi, 0xec,
-				   0x64, 0xdc, 0xec, 0x3b, 0x52, 0x00, 0x0b, 0x0b,
-				   0x13, 0x15, 0x68, 0x0b, 0xb5);
-	mipi_dsi_generic_write_seq(dsi, 0xb0, 0x03);
-
-	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(dsi, MIPI_DCS_SET_ADDRESS_MODE, 0x00);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x00);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd6, 0x01);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xec,
+					 0x64, 0xdc, 0xec, 0x3b, 0x52, 0x00, 0x0b, 0x0b,
+					 0x13, 0x15, 0x68, 0x0b, 0xb5);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x03);
 
-	ret = mipi_dsi_dcs_set_pixel_format(dsi, 0x77);
-	if (ret < 0) {
-		dev_err(dev, "Failed to set pixel format: %d\n", ret);
-		return ret;
-	}
-
-	ret = mipi_dsi_dcs_set_column_address(dsi, 0x0000, 0x0437);
-	if (ret < 0) {
-		dev_err(dev, "Failed to set column address: %d\n", ret);
-		return ret;
-	}
+	mipi_dsi_dcs_set_tear_on_multi(&dsi_ctx, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
 
-	ret = mipi_dsi_dcs_set_page_address(dsi, 0x0000, 0x077f);
-	if (ret < 0) {
-		dev_err(dev, "Failed to set page address: %d\n", ret);
-		return ret;
-	}
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_SET_ADDRESS_MODE, 0x00);
 
-	ret = mipi_dsi_dcs_set_tear_scanline(dsi, 0x0000);
-	if (ret < 0) {
-		dev_err(dev, "Failed to set tear scanline: %d\n", ret);
-		return ret;
-	}
+	mipi_dsi_dcs_set_pixel_format_multi(&dsi_ctx, 0x77);
+	mipi_dsi_dcs_set_column_address_multi(&dsi_ctx, 0x0000, 0x0437);
+	mipi_dsi_dcs_set_page_address_multi(&dsi_ctx, 0x0000, 0x077f);
+	mipi_dsi_dcs_set_tear_scanline_multi(&dsi_ctx, 0x0000);
+	mipi_dsi_dcs_set_display_brightness_multi(&dsi_ctx, 0x00ff);
 
-	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_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_multi(&dsi_ctx, MIPI_DCS_SET_CABC_MIN_BRIGHTNESS, 0x00);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x84, 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_write_seq(dsi, MIPI_DCS_SET_CABC_MIN_BRIGHTNESS, 0x00);
-	mipi_dsi_dcs_write_seq(dsi, 0x84, 0x00);
+	mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
+	mipi_dsi_msleep(&dsi_ctx, 20);
+	mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
+	mipi_dsi_msleep(&dsi_ctx, 80);
 
-	ret = mipi_dsi_dcs_set_display_on(dsi);
-	if (ret < 0) {
-		dev_err(dev, "Failed to set display on: %d\n", ret);
-		return ret;
-	}
-	msleep(20);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x04);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x84, 0x00);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc8, 0x11);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x03);
 
-	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(80);
-
-	mipi_dsi_generic_write_seq(dsi, 0xb0, 0x04);
-	mipi_dsi_dcs_write_seq(dsi, 0x84, 0x00);
-	mipi_dsi_generic_write_seq(dsi, 0xc8, 0x11);
-	mipi_dsi_generic_write_seq(dsi, 0xb0, 0x03);
-
-	return 0;
+	return dsi_ctx.accum_err;
 }
 
-static int jdi_fhd_r63452_off(struct jdi_fhd_r63452 *ctx)
+static void jdi_fhd_r63452_off(struct jdi_fhd_r63452 *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;
 
-	mipi_dsi_generic_write_seq(dsi, 0xb0, 0x00);
-	mipi_dsi_generic_write_seq(dsi, 0xd6, 0x01);
-	mipi_dsi_generic_write_seq(dsi, 0xec,
-				   0x64, 0xdc, 0xec, 0x3b, 0x52, 0x00, 0x0b, 0x0b,
-				   0x13, 0x15, 0x68, 0x0b, 0x95);
-	mipi_dsi_generic_write_seq(dsi, 0xb0, 0x03);
-
-	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(2000, 3000);
-
-	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);
-
-	return 0;
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x00);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd6, 0x01);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xec,
+					 0x64, 0xdc, 0xec, 0x3b, 0x52, 0x00, 0x0b, 0x0b,
+					 0x13, 0x15, 0x68, 0x0b, 0x95);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x03);
+
+	mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
+	if (!dsi_ctx.accum_err)
+		usleep_range(2000, 3000);
+	mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
+	mipi_dsi_msleep(&dsi_ctx, 120);
 }
 
 static int jdi_fhd_r63452_prepare(struct drm_panel *panel)
 {
 	struct jdi_fhd_r63452 *ctx = to_jdi_fhd_r63452(panel);
-	struct device *dev = &ctx->dsi->dev;
 	int ret;
 
 	jdi_fhd_r63452_reset(ctx);
 
 	ret = jdi_fhd_r63452_on(ctx);
-	if (ret < 0) {
-		dev_err(dev, "Failed to initialize panel: %d\n", ret);
+	if (ret < 0)
 		gpiod_set_value_cansleep(ctx->reset_gpio, 1);
-		return ret;
-	}
 
-	return 0;
+	return ret;
 }
 
 static int jdi_fhd_r63452_unprepare(struct drm_panel *panel)
 {
 	struct jdi_fhd_r63452 *ctx = to_jdi_fhd_r63452(panel);
-	struct device *dev = &ctx->dsi->dev;
-	int ret;
 
-	ret = jdi_fhd_r63452_off(ctx);
-	if (ret < 0)
-		dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
+	/*
+	 * NOTE: We don't return an error here as while the panel won't have
+	 * been cleanly turned off at least we've asserted the reset signal
+	 * so it should be safe to power it back on again later
+	 */
+	jdi_fhd_r63452_off(ctx);
 
 	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
 
-- 
2.46.0