On 2/27/23 20:01, Jagan Teki wrote:
On Tue, Feb 28, 2023 at 12:25 AM Marek Vasut <marex@xxxxxxx> wrote:
On 2/27/23 12:39, Jagan Teki wrote:
drm_of_dsi_find_panel_or_bridge is capable of looking up the
downstream DSI bridge and panel and trying to add a panel bridge
if the panel is found.
Replace explicit finding calls with drm_of_dsi_find_panel_or_bridge
followed with drmm_panel_bridge_add.
Signed-off-by: Jagan Teki <jagan@xxxxxxxxxxxxxxxxxxxx>
---
Changes for v13, v12, v11:
- none
Changes for v10:
- new patch
drivers/gpu/drm/exynos/exynos_drm_dsi.c | 25 +++++++++++++------------
1 file changed, 13 insertions(+), 12 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
index df15501b1075..12a6dd987e8f 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
@@ -25,6 +25,7 @@
#include <drm/drm_atomic_helper.h>
#include <drm/drm_bridge.h>
#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_of.h>
#include <drm/drm_panel.h>
#include <drm/drm_print.h>
#include <drm/drm_probe_helper.h>
@@ -1470,24 +1471,26 @@ static int exynos_dsi_host_attach(struct mipi_dsi_host *host,
struct device *dev = dsi->dev;
struct drm_encoder *encoder = &dsi->encoder;
struct drm_device *drm = encoder->dev;
+ struct drm_bridge *bridge;
struct drm_panel *panel;
int ret;
- panel = of_drm_find_panel(device->dev.of_node);
- if (!IS_ERR(panel)) {
- dsi->out_bridge = devm_drm_panel_bridge_add(dev, panel);
- } else {
- dsi->out_bridge = of_drm_find_bridge(device->dev.of_node);
- if (!dsi->out_bridge)
- dsi->out_bridge = ERR_PTR(-EINVAL);
- }
As far as I understand this from my conversation with Maxime (please put
him on CC of V15), the change here should instead perform the panel look
up NOT in exynos_dsi_host_attach() , but in exynos_dsi_bind() , i.e. in
the component_ops .bind callback . Here is an example of correct
implementation:
https://cgit.freedesktop.org/drm-misc/tree/drivers/gpu/drm/vc4/vc4_dsi.c#n1805
But, we don't have component_ops.bind for imx8m case, so where do we
want to place the panel hook?
Exynos drm drivers are component-based but, imx8mm is not.
In 14/18 patch, the same should be added to generic_dsim_register_host()
, which is called from the driver .probe() callback, but that is OK.
That's ^ is the iMX part.
