From 38992c57c9c8425dc9cb75efe6f9b9255ea627a0 Mon Sep 17 00:00:00 2001 From: Jyri Sarha Date: Thu, 26 Apr 2018 11:06:59 +0300 Subject: [PATCH] drm/panel: Remove drm_panel_detach() calls from all panel drivers Remove all drm_panel_detach() calls from all panel drivers and update the kerneldoc for drm_panel_detach(). Setting the connector and drm to NULL when the DRM panel device is going away hardly serves any purpose. Usually the whole memory structure is freed right after the remove call. However, calling the detach function from the master DRM device, and setting the connector pointer to NULL, has the logic of marking the panel again as available for another DRM master to attach. The usual situation would be the same DRM master device binding again. Signed-off-by: Jyri Sarha Reviewed-by: Daniel Vetter Signed-off-by: Thierry Reding Link: https://patchwork.freedesktop.org/patch/msgid/464b8d330d6b4c94cfb5aad2ca9ea7eb2c52d934.1524727888.git.jsarha@ti.com --- drivers/gpu/drm/drm_panel.c | 6 ++++++ drivers/gpu/drm/panel/panel-innolux-p079zca.c | 1 - drivers/gpu/drm/panel/panel-jdi-lt070me05000.c | 1 - drivers/gpu/drm/panel/panel-lvds.c | 1 - drivers/gpu/drm/panel/panel-panasonic-vvx10f034n00.c | 1 - drivers/gpu/drm/panel/panel-seiko-43wvf1g.c | 1 - drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c | 1 - drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c | 1 - drivers/gpu/drm/panel/panel-simple.c | 1 - drivers/gpu/drm/panel/panel-sitronix-st7789v.c | 1 - 10 files changed, 6 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/drm_panel.c b/drivers/gpu/drm/drm_panel.c index 308d442a531b2..71e407574276b 100644 --- a/drivers/gpu/drm/drm_panel.c +++ b/drivers/gpu/drm/drm_panel.c @@ -94,6 +94,9 @@ EXPORT_SYMBOL(drm_panel_remove); * * An error is returned if the panel is already attached to another connector. * + * When unloading, the driver should detach from the panel by calling + * drm_panel_detach(). + * * Return: 0 on success or a negative error code on failure. */ int drm_panel_attach(struct drm_panel *panel, struct drm_connector *connector) @@ -115,6 +118,9 @@ EXPORT_SYMBOL(drm_panel_attach); * Detaches a panel from the connector it is attached to. If a panel is not * attached to any connector this is effectively a no-op. * + * This function should not be called by the panel device itself. It + * is only for the drm device that called drm_panel_attach(). + * * Return: 0 on success or a negative error code on failure. */ int drm_panel_detach(struct drm_panel *panel) diff --git a/drivers/gpu/drm/panel/panel-innolux-p079zca.c b/drivers/gpu/drm/panel/panel-innolux-p079zca.c index 57df39b5c5899..bb53e08507643 100644 --- a/drivers/gpu/drm/panel/panel-innolux-p079zca.c +++ b/drivers/gpu/drm/panel/panel-innolux-p079zca.c @@ -292,7 +292,6 @@ static int innolux_panel_remove(struct mipi_dsi_device *dsi) DRM_DEV_ERROR(&dsi->dev, "failed to detach from DSI host: %d\n", err); - drm_panel_detach(&innolux->base); innolux_panel_del(innolux); return 0; diff --git a/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c b/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c index 0a94ab79a6c0f..99caa7835e7b1 100644 --- a/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c +++ b/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c @@ -500,7 +500,6 @@ static int jdi_panel_remove(struct mipi_dsi_device *dsi) dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret); - drm_panel_detach(&jdi->base); jdi_panel_del(jdi); return 0; diff --git a/drivers/gpu/drm/panel/panel-lvds.c b/drivers/gpu/drm/panel/panel-lvds.c index 5185819c5b797..8a1687887ae91 100644 --- a/drivers/gpu/drm/panel/panel-lvds.c +++ b/drivers/gpu/drm/panel/panel-lvds.c @@ -282,7 +282,6 @@ static int panel_lvds_remove(struct platform_device *pdev) { struct panel_lvds *lvds = dev_get_drvdata(&pdev->dev); - drm_panel_detach(&lvds->panel); drm_panel_remove(&lvds->panel); panel_lvds_disable(&lvds->panel); diff --git a/drivers/gpu/drm/panel/panel-panasonic-vvx10f034n00.c b/drivers/gpu/drm/panel/panel-panasonic-vvx10f034n00.c index 74a806121f80e..cb4dfb98be0f1 100644 --- a/drivers/gpu/drm/panel/panel-panasonic-vvx10f034n00.c +++ b/drivers/gpu/drm/panel/panel-panasonic-vvx10f034n00.c @@ -299,7 +299,6 @@ static int wuxga_nt_panel_remove(struct mipi_dsi_device *dsi) if (ret < 0) dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret); - drm_panel_detach(&wuxga_nt->base); wuxga_nt_panel_del(wuxga_nt); return 0; diff --git a/drivers/gpu/drm/panel/panel-seiko-43wvf1g.c b/drivers/gpu/drm/panel/panel-seiko-43wvf1g.c index 71c09ed436ae4..75f9253905510 100644 --- a/drivers/gpu/drm/panel/panel-seiko-43wvf1g.c +++ b/drivers/gpu/drm/panel/panel-seiko-43wvf1g.c @@ -292,7 +292,6 @@ static int seiko_panel_remove(struct platform_device *pdev) { struct seiko_panel *panel = dev_get_drvdata(&pdev->dev); - drm_panel_detach(&panel->base); drm_panel_remove(&panel->base); seiko_panel_disable(&panel->base); diff --git a/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c b/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c index 6bf8730f1a211..02fc0f5423d40 100644 --- a/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c +++ b/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c @@ -418,7 +418,6 @@ static int sharp_panel_remove(struct mipi_dsi_device *dsi) if (err < 0) dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err); - drm_panel_detach(&sharp->base); sharp_panel_del(sharp); return 0; diff --git a/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c b/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c index 494aa9b1628a7..e5cae0050f52d 100644 --- a/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c +++ b/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c @@ -327,7 +327,6 @@ static int sharp_nt_panel_remove(struct mipi_dsi_device *dsi) if (ret < 0) dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret); - drm_panel_detach(&sharp_nt->base); sharp_nt_panel_del(sharp_nt); return 0; diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c index cbf1ab404ee77..062b6b416b896 100644 --- a/drivers/gpu/drm/panel/panel-simple.c +++ b/drivers/gpu/drm/panel/panel-simple.c @@ -364,7 +364,6 @@ static int panel_simple_remove(struct device *dev) { struct panel_simple *panel = dev_get_drvdata(dev); - drm_panel_detach(&panel->base); drm_panel_remove(&panel->base); panel_simple_disable(&panel->base); diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7789v.c b/drivers/gpu/drm/panel/panel-sitronix-st7789v.c index 358c64ef19222..74284e5afc5d9 100644 --- a/drivers/gpu/drm/panel/panel-sitronix-st7789v.c +++ b/drivers/gpu/drm/panel/panel-sitronix-st7789v.c @@ -419,7 +419,6 @@ static int st7789v_remove(struct spi_device *spi) { struct st7789v *ctx = spi_get_drvdata(spi); - drm_panel_detach(&ctx->panel); drm_panel_remove(&ctx->panel); if (ctx->backlight) -- 2.30.2