Hi Marek,
22. 5. 13. 17:31에 Marek Szyprowski 이(가) 쓴 글:
> Commit dd8b6803bc49 ("exynos: drm: dsi: Attach in_bridge in MIC driver")
> moved Exynos MIC attaching from DSI to MIC driver. However the method
> proposed there is incomplete and cannot really work. To properly attach
> it to the bridge chain, access to the respective encoder is needed. The
> Exynos MIC driver always attaches to the encoder created by the Exynos
> DSI driver, so grab it via available helpers for getting access to the
> CRTC and encoders. This also requires to change the order of driver
> component binding to let DSI to be bound before MIC.
>
> Fixes: dd8b6803bc49 ("exynos: drm: dsi: Attach in_bridge in MIC driver")
> Signed-off-by: Marek Szyprowski <m.szyprow...@samsung.com>
> ---
> A few words of comment. The mentioned commit has my Tested-by tag and
> indeed I gave it. However that time due to remote work and incorrect
> camera configuration in the office I was not able to check if the board
> really produces valid display, I only checked if it boots and reports
> valid DRM structures to the userspace.
>
> If possible, please merge this to the drm-misc-next together with the
> rest of Exynos DSI to drm bridge rework patches.
The commit-id, dd8b6803bc49, has already been merged to drm-next. Seems no need
to go drm-misc-next.
So I will merge it as a regression fix after the review, which will be merged
to 5.19-rc series.
Please let me know if there is my missing something.
Thanks,
Inki Dae
> ---
> drivers/gpu/drm/exynos/exynos_drm_drv.c | 6 ++--
> drivers/gpu/drm/exynos/exynos_drm_mic.c | 42 +++++++------------------
> 2 files changed, 15 insertions(+), 33 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c
> b/drivers/gpu/drm/exynos/exynos_drm_drv.c
> index 424ea23eec32..16c539657f73 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
> @@ -176,15 +176,15 @@ static struct exynos_drm_driver_info
> exynos_drm_drivers[] = {
> }, {
> DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
> DRM_COMPONENT_DRIVER
> - }, {
> - DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
> - DRM_COMPONENT_DRIVER
> }, {
> DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
> DRM_COMPONENT_DRIVER
> }, {
> DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
> DRM_COMPONENT_DRIVER
> + }, {
> + DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
> + DRM_COMPONENT_DRIVER
> }, {
> DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
> DRM_COMPONENT_DRIVER
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_mic.c
> b/drivers/gpu/drm/exynos/exynos_drm_mic.c
> index 9e06f8e2a863..09ce28ee08d9 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_mic.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_mic.c
> @@ -26,6 +26,7 @@
> #include <drm/drm_print.h>
>
> #include "exynos_drm_drv.h"
> +#include "exynos_drm_crtc.h"
>
> /* Sysreg registers for MIC */
> #define DSD_CFG_MUX 0x1004
> @@ -100,9 +101,7 @@ struct exynos_mic {
>
> bool i80_mode;
> struct videomode vm;
> - struct drm_encoder *encoder;
> struct drm_bridge bridge;
> - struct drm_bridge *next_bridge;
>
> bool enabled;
> };
> @@ -229,8 +228,6 @@ static void mic_set_reg_on(struct exynos_mic *mic, bool
> enable)
> writel(reg, mic->reg + MIC_OP);
> }
>
> -static void mic_disable(struct drm_bridge *bridge) { }
> -
> static void mic_post_disable(struct drm_bridge *bridge)
> {
> struct exynos_mic *mic = bridge->driver_private;
> @@ -297,34 +294,30 @@ static void mic_pre_enable(struct drm_bridge *bridge)
> mutex_unlock(&mic_mutex);
> }
>
> -static void mic_enable(struct drm_bridge *bridge) { }
> -
> -static int mic_attach(struct drm_bridge *bridge,
> - enum drm_bridge_attach_flags flags)
> -{
> - struct exynos_mic *mic = bridge->driver_private;
> -
> - return drm_bridge_attach(bridge->encoder, mic->next_bridge,
> - &mic->bridge, flags);
> -}
> -
> static const struct drm_bridge_funcs mic_bridge_funcs = {
> - .disable = mic_disable,
> .post_disable = mic_post_disable,
> .mode_set = mic_mode_set,
> .pre_enable = mic_pre_enable,
> - .enable = mic_enable,
> - .attach = mic_attach,
> };
>
> static int exynos_mic_bind(struct device *dev, struct device *master,
> void *data)
> {
> struct exynos_mic *mic = dev_get_drvdata(dev);
> + struct drm_device *drm_dev = data;
> + struct exynos_drm_crtc *crtc = exynos_drm_crtc_get_by_type(drm_dev,
> + EXYNOS_DISPLAY_TYPE_LCD);
> + struct drm_encoder *e, *encoder = NULL;
> +
> + drm_for_each_encoder(e, drm_dev)
> + if (e->possible_crtcs == drm_crtc_mask(&crtc->base))
> + encoder = e;
> + if (!encoder)
> + return -ENODEV;
>
> mic->bridge.driver_private = mic;
>
> - return 0;
> + return drm_bridge_attach(encoder, &mic->bridge, NULL, 0);
> }
>
> static void exynos_mic_unbind(struct device *dev, struct device *master,
> @@ -388,7 +381,6 @@ static int exynos_mic_probe(struct platform_device *pdev)
> {
> struct device *dev = &pdev->dev;
> struct exynos_mic *mic;
> - struct device_node *remote;
> struct resource res;
> int ret, i;
>
> @@ -432,16 +424,6 @@ static int exynos_mic_probe(struct platform_device *pdev)
> }
> }
>
> - remote = of_graph_get_remote_node(dev->of_node, 1, 0);
> - mic->next_bridge = of_drm_find_bridge(remote);
> - if (IS_ERR(mic->next_bridge)) {
> - DRM_DEV_ERROR(dev, "mic: Failed to find next bridge\n");
> - ret = PTR_ERR(mic->next_bridge);
> - goto err;
> - }
> -
> - of_node_put(remote);
> -
> platform_set_drvdata(pdev, mic);
>
> mic->bridge.funcs = &mic_bridge_funcs;
