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drm/bridge/synopsys: stop clobbering drvdata 

Bridge drivers/helpers shouldn't be clobbering the drvdata, since a
parent driver might need to own this. Instead, let's return our
'dw_mipi_dsi' object and have callers pass that back to us for removal.

Signed-off-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Archit Taneja <architt@codeaurora.org>
Acked-by: Philippe Cornu <philippe.cornu@st.com>
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171128010538.119114-1-briannorris@chromium.org
This commit is contained in:
Brian Norris 2017-11-27 17:05:38 -08:00 committed by Andrzej Hajda
parent b706a25eae
commit 8242ecbd59
3 changed files with 33 additions and 34 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
View File

@ -922,8 +922,6 @@ __dw_mipi_dsi_probe(struct platform_device *pdev,
dsi->bridge.of_node = pdev->dev.of_node; dsi->bridge.of_node = pdev->dev.of_node;
#endif #endif
dev_set_drvdata(dev, dsi);
return dsi; return dsi;
} }
@ -935,23 +933,16 @@ static void __dw_mipi_dsi_remove(struct dw_mipi_dsi *dsi)
/* /*
* Probe/remove API, used from platforms based on the DRM bridge API. * Probe/remove API, used from platforms based on the DRM bridge API.
*/ */
int dw_mipi_dsi_probe(struct platform_device *pdev, struct dw_mipi_dsi *
dw_mipi_dsi_probe(struct platform_device *pdev,
const struct dw_mipi_dsi_plat_data *plat_data) const struct dw_mipi_dsi_plat_data *plat_data)
{ {
struct dw_mipi_dsi *dsi; return __dw_mipi_dsi_probe(pdev, plat_data);
dsi = __dw_mipi_dsi_probe(pdev, plat_data);
if (IS_ERR(dsi))
return PTR_ERR(dsi);
return 0;
} }
EXPORT_SYMBOL_GPL(dw_mipi_dsi_probe); EXPORT_SYMBOL_GPL(dw_mipi_dsi_probe);
void dw_mipi_dsi_remove(struct platform_device *pdev) void dw_mipi_dsi_remove(struct dw_mipi_dsi *dsi)
{ {
struct dw_mipi_dsi *dsi = platform_get_drvdata(pdev);
mipi_dsi_host_unregister(&dsi->dsi_host); mipi_dsi_host_unregister(&dsi->dsi_host);
__dw_mipi_dsi_remove(dsi); __dw_mipi_dsi_remove(dsi);
@ -961,7 +952,8 @@ EXPORT_SYMBOL_GPL(dw_mipi_dsi_remove);
/* /*
* Bind/unbind API, used from platforms based on the component framework. * Bind/unbind API, used from platforms based on the component framework.
*/ */
int dw_mipi_dsi_bind(struct platform_device *pdev, struct drm_encoder *encoder, struct dw_mipi_dsi *
dw_mipi_dsi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
const struct dw_mipi_dsi_plat_data *plat_data) const struct dw_mipi_dsi_plat_data *plat_data)
{ {
struct dw_mipi_dsi *dsi; struct dw_mipi_dsi *dsi;
@ -969,23 +961,21 @@ int dw_mipi_dsi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
dsi = __dw_mipi_dsi_probe(pdev, plat_data); dsi = __dw_mipi_dsi_probe(pdev, plat_data);
if (IS_ERR(dsi)) if (IS_ERR(dsi))
return PTR_ERR(dsi); return dsi;
ret = drm_bridge_attach(encoder, &dsi->bridge, NULL); ret = drm_bridge_attach(encoder, &dsi->bridge, NULL);
if (ret) { if (ret) {
dw_mipi_dsi_remove(pdev); dw_mipi_dsi_remove(dsi);
DRM_ERROR("Failed to initialize bridge with drm\n"); DRM_ERROR("Failed to initialize bridge with drm\n");
return ret; return ERR_PTR(ret);
} }
return 0; return dsi;
} }
EXPORT_SYMBOL_GPL(dw_mipi_dsi_bind); EXPORT_SYMBOL_GPL(dw_mipi_dsi_bind);
void dw_mipi_dsi_unbind(struct device *dev) void dw_mipi_dsi_unbind(struct dw_mipi_dsi *dsi)
{ {
struct dw_mipi_dsi *dsi = dev_get_drvdata(dev);
__dw_mipi_dsi_remove(dsi); __dw_mipi_dsi_remove(dsi);
} }
EXPORT_SYMBOL_GPL(dw_mipi_dsi_unbind); EXPORT_SYMBOL_GPL(dw_mipi_dsi_unbind);

14
drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
View File

@ -65,6 +65,7 @@ enum dsi_color {
struct dw_mipi_dsi_stm { struct dw_mipi_dsi_stm {
void __iomem *base; void __iomem *base;
struct clk *pllref_clk; struct clk *pllref_clk;
struct dw_mipi_dsi *dsi;
}; };
static inline void dsi_write(struct dw_mipi_dsi_stm *dsi, u32 reg, u32 val) static inline void dsi_write(struct dw_mipi_dsi_stm *dsi, u32 reg, u32 val)
@ -312,21 +313,24 @@ static int dw_mipi_dsi_stm_probe(struct platform_device *pdev)
dw_mipi_dsi_stm_plat_data.base = dsi->base; dw_mipi_dsi_stm_plat_data.base = dsi->base;
dw_mipi_dsi_stm_plat_data.priv_data = dsi; dw_mipi_dsi_stm_plat_data.priv_data = dsi;
ret = dw_mipi_dsi_probe(pdev, &dw_mipi_dsi_stm_plat_data); platform_set_drvdata(pdev, dsi);
if (ret) {
dsi->dsi = dw_mipi_dsi_probe(pdev, &dw_mipi_dsi_stm_plat_data);
if (IS_ERR(dsi->dsi)) {
DRM_ERROR("Failed to initialize mipi dsi host\n"); DRM_ERROR("Failed to initialize mipi dsi host\n");
clk_disable_unprepare(dsi->pllref_clk); clk_disable_unprepare(dsi->pllref_clk);
return PTR_ERR(dsi->dsi);
} }
return ret; return 0;
} }
static int dw_mipi_dsi_stm_remove(struct platform_device *pdev) static int dw_mipi_dsi_stm_remove(struct platform_device *pdev)
{ {
struct dw_mipi_dsi_stm *dsi = dw_mipi_dsi_stm_plat_data.priv_data; struct dw_mipi_dsi_stm *dsi = platform_get_drvdata(pdev);
clk_disable_unprepare(dsi->pllref_clk); clk_disable_unprepare(dsi->pllref_clk);
dw_mipi_dsi_remove(pdev); dw_mipi_dsi_remove(dsi->dsi);
return 0; return 0;
} }

17
include/drm/bridge/dw_mipi_dsi.h
View File

@ -10,6 +10,8 @@
#ifndef __DW_MIPI_DSI__ #ifndef __DW_MIPI_DSI__
#define __DW_MIPI_DSI__ #define __DW_MIPI_DSI__
struct dw_mipi_dsi;
struct dw_mipi_dsi_phy_ops { struct dw_mipi_dsi_phy_ops {
int (*init)(void *priv_data); int (*init)(void *priv_data);
int (*get_lane_mbps)(void *priv_data, struct drm_display_mode *mode, int (*get_lane_mbps)(void *priv_data, struct drm_display_mode *mode,
@ -29,11 +31,14 @@ struct dw_mipi_dsi_plat_data {
void *priv_data; void *priv_data;
}; };
int dw_mipi_dsi_probe(struct platform_device *pdev, struct dw_mipi_dsi *dw_mipi_dsi_probe(struct platform_device *pdev,
const struct dw_mipi_dsi_plat_data *plat_data); const struct dw_mipi_dsi_plat_data
void dw_mipi_dsi_remove(struct platform_device *pdev); *plat_data);
int dw_mipi_dsi_bind(struct platform_device *pdev, struct drm_encoder *encoder, void dw_mipi_dsi_remove(struct dw_mipi_dsi *dsi);
const struct dw_mipi_dsi_plat_data *plat_data); struct dw_mipi_dsi *dw_mipi_dsi_bind(struct platform_device *pdev,
void dw_mipi_dsi_unbind(struct device *dev); struct drm_encoder *encoder,
const struct dw_mipi_dsi_plat_data
*plat_data);
void dw_mipi_dsi_unbind(struct dw_mipi_dsi *dsi);
#endif /* __DW_MIPI_DSI__ */ #endif /* __DW_MIPI_DSI__ */