| Message ID | 20220408162108.184583-3-jagan@amarulasolutions.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | drm: bridge: Add Samsung MIPI DSIM bridge | expand |
On 08.04.2022 18:20, Jagan Teki wrote: > In order to make a common Samsung DSIM bridge driver some platform specific > glue code needs to maintain separately as it is hard to maintain platform > specific glue and conventional component_ops on the drm bridge drivers side. > > This patch is trying to support that glue code initialization and invocation > in the form of platform_init flag in driver_data. > > So, the platforms which enable platform_init flags will handle all platform > specific initialization via samsung_dsim_plat_probe. > > The Platform probe is responsible to > - initialize samsung_dsim_plat_data and install hooks > - initialize component_ops > - preserve samsung_dsim structure pointer > > v1: > * use platform_init instead of exynos_specific > * handle component_ops in glue code > > Signed-off-by: Jagan Teki <jagan@amarulasolutions.com> > --- > drivers/gpu/drm/bridge/samsung-dsim.c | 20 ++++++++++++++++---- > include/drm/bridge/samsung-dsim.h | 1 + > 2 files changed, 17 insertions(+), 4 deletions(-) > > diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c > index ee5d7e5518a6..0e6a5d1c7e4e 100644 > --- a/drivers/gpu/drm/bridge/samsung-dsim.c > +++ b/drivers/gpu/drm/bridge/samsung-dsim.c > @@ -370,6 +370,7 @@ static const struct samsung_dsim_driver_data exynos3_dsi_driver_data = { > .wait_for_reset = 1, > .num_bits_resol = 11, > .reg_values = reg_values, > + .platform_init = true, > }; > > static const struct samsung_dsim_driver_data exynos4_dsi_driver_data = { > @@ -382,6 +383,7 @@ static const struct samsung_dsim_driver_data exynos4_dsi_driver_data = { > .wait_for_reset = 1, > .num_bits_resol = 11, > .reg_values = reg_values, > + .platform_init = true, > }; > > static const struct samsung_dsim_driver_data exynos5_dsi_driver_data = { > @@ -392,6 +394,7 @@ static const struct samsung_dsim_driver_data exynos5_dsi_driver_data = { > .wait_for_reset = 1, > .num_bits_resol = 11, > .reg_values = reg_values, > + .platform_init = true, > }; > > static const struct samsung_dsim_driver_data exynos5433_dsi_driver_data = { > @@ -403,6 +406,7 @@ static const struct samsung_dsim_driver_data exynos5433_dsi_driver_data = { > .wait_for_reset = 0, > .num_bits_resol = 12, > .reg_values = exynos5433_reg_values, > + .platform_init = true, > }; > > static const struct samsung_dsim_driver_data exynos5422_dsi_driver_data = { > @@ -414,6 +418,7 @@ static const struct samsung_dsim_driver_data exynos5422_dsi_driver_data = { > .wait_for_reset = 1, > .num_bits_resol = 12, > .reg_values = exynos5422_reg_values, > + .platform_init = true, > }; > > static const struct of_device_id samsung_dsim_of_match[] = { > @@ -1565,12 +1570,16 @@ static int samsung_dsim_probe(struct platform_device *pdev) > dsi->bridge.of_node = dev->of_node; > dsi->bridge.type = DRM_MODE_CONNECTOR_DSI; > > - dsi->plat_data = samsung_dsim_plat_probe(dsi); > - if (IS_ERR(dsi->plat_data)) { > + if (dsi->driver_data->platform_init) { > + dsi->plat_data = samsung_dsim_plat_probe(dsi); > ret = PTR_ERR(dsi->plat_data); ret = IS_ERR(dsi->plat_data) ? PTR_ERR(dsi->plat_data) : 0; otherwise it always fails. > - goto err_disable_runtime; > + } else { > + ret = mipi_dsi_host_register(&dsi->dsi_host); > } > > + if (ret) > + goto err_disable_runtime; > + > return 0; > > err_disable_runtime: > @@ -1585,7 +1594,10 @@ static int samsung_dsim_remove(struct platform_device *pdev) > > pm_runtime_disable(&pdev->dev); > > - samsung_dsim_plat_remove(dsi); > + if (dsi->driver_data->platform_init) > + samsung_dsim_plat_remove(dsi); > + else > + mipi_dsi_host_unregister(&dsi->dsi_host); > > return 0; > } > diff --git a/include/drm/bridge/samsung-dsim.h b/include/drm/bridge/samsung-dsim.h > index 59a43f9c4477..eca7eacb5910 100644 > --- a/include/drm/bridge/samsung-dsim.h > +++ b/include/drm/bridge/samsung-dsim.h > @@ -39,6 +39,7 @@ struct samsung_dsim_driver_data { > unsigned int wait_for_reset; > unsigned int num_bits_resol; > const unsigned int *reg_values; > + bool platform_init; > }; > > struct samsung_dsim_host_ops { Best regards
diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c index ee5d7e5518a6..0e6a5d1c7e4e 100644 --- a/drivers/gpu/drm/bridge/samsung-dsim.c +++ b/drivers/gpu/drm/bridge/samsung-dsim.c @@ -370,6 +370,7 @@ static const struct samsung_dsim_driver_data exynos3_dsi_driver_data = { .wait_for_reset = 1, .num_bits_resol = 11, .reg_values = reg_values, + .platform_init = true, }; static const struct samsung_dsim_driver_data exynos4_dsi_driver_data = { @@ -382,6 +383,7 @@ static const struct samsung_dsim_driver_data exynos4_dsi_driver_data = { .wait_for_reset = 1, .num_bits_resol = 11, .reg_values = reg_values, + .platform_init = true, }; static const struct samsung_dsim_driver_data exynos5_dsi_driver_data = { @@ -392,6 +394,7 @@ static const struct samsung_dsim_driver_data exynos5_dsi_driver_data = { .wait_for_reset = 1, .num_bits_resol = 11, .reg_values = reg_values, + .platform_init = true, }; static const struct samsung_dsim_driver_data exynos5433_dsi_driver_data = { @@ -403,6 +406,7 @@ static const struct samsung_dsim_driver_data exynos5433_dsi_driver_data = { .wait_for_reset = 0, .num_bits_resol = 12, .reg_values = exynos5433_reg_values, + .platform_init = true, }; static const struct samsung_dsim_driver_data exynos5422_dsi_driver_data = { @@ -414,6 +418,7 @@ static const struct samsung_dsim_driver_data exynos5422_dsi_driver_data = { .wait_for_reset = 1, .num_bits_resol = 12, .reg_values = exynos5422_reg_values, + .platform_init = true, }; static const struct of_device_id samsung_dsim_of_match[] = { @@ -1565,12 +1570,16 @@ static int samsung_dsim_probe(struct platform_device *pdev) dsi->bridge.of_node = dev->of_node; dsi->bridge.type = DRM_MODE_CONNECTOR_DSI; - dsi->plat_data = samsung_dsim_plat_probe(dsi); - if (IS_ERR(dsi->plat_data)) { + if (dsi->driver_data->platform_init) { + dsi->plat_data = samsung_dsim_plat_probe(dsi); ret = PTR_ERR(dsi->plat_data); - goto err_disable_runtime; + } else { + ret = mipi_dsi_host_register(&dsi->dsi_host); } + if (ret) + goto err_disable_runtime; + return 0; err_disable_runtime: @@ -1585,7 +1594,10 @@ static int samsung_dsim_remove(struct platform_device *pdev) pm_runtime_disable(&pdev->dev); - samsung_dsim_plat_remove(dsi); + if (dsi->driver_data->platform_init) + samsung_dsim_plat_remove(dsi); + else + mipi_dsi_host_unregister(&dsi->dsi_host); return 0; } diff --git a/include/drm/bridge/samsung-dsim.h b/include/drm/bridge/samsung-dsim.h index 59a43f9c4477..eca7eacb5910 100644 --- a/include/drm/bridge/samsung-dsim.h +++ b/include/drm/bridge/samsung-dsim.h @@ -39,6 +39,7 @@ struct samsung_dsim_driver_data { unsigned int wait_for_reset; unsigned int num_bits_resol; const unsigned int *reg_values; + bool platform_init; }; struct samsung_dsim_host_ops {
In order to make a common Samsung DSIM bridge driver some platform specific glue code needs to maintain separately as it is hard to maintain platform specific glue and conventional component_ops on the drm bridge drivers side. This patch is trying to support that glue code initialization and invocation in the form of platform_init flag in driver_data. So, the platforms which enable platform_init flags will handle all platform specific initialization via samsung_dsim_plat_probe. The Platform probe is responsible to - initialize samsung_dsim_plat_data and install hooks - initialize component_ops - preserve samsung_dsim structure pointer v1: * use platform_init instead of exynos_specific * handle component_ops in glue code Signed-off-by: Jagan Teki <jagan@amarulasolutions.com> --- drivers/gpu/drm/bridge/samsung-dsim.c | 20 ++++++++++++++++---- include/drm/bridge/samsung-dsim.h | 1 + 2 files changed, 17 insertions(+), 4 deletions(-)