drm: mali-dp: Set encoder possible_clones

Set possible_clones field to report that the writeback connector and
the one driving the display could be enabled at the same time.

Signed-off-by: Alexandru Gheorghe <alexandru-cosmin.gheorghe@arm.com>
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>

diff --git a/drivers/gpu/drm/arm/malidp_drv.c b/drivers/gpu/drm/arm/malidp_drv.c
index 5b72605..08b5bb2 100644 (file)
--- a/drivers/gpu/drm/arm/malidp_drv.c
+++ b/drivers/gpu/drm/arm/malidp_drv.c
@@ -616,6 +616,7 @@ static int malidp_bind(struct device *dev)
        struct malidp_hw_device *hwdev;
        struct platform_device *pdev = to_platform_device(dev);
        struct of_device_id const *dev_id;
+       struct drm_encoder *encoder;
        /* number of lines for the R, G and B output */
        u8 output_width[MAX_OUTPUT_CHANNELS];
        int ret = 0, i;
@@ -737,6 +738,15 @@ static int malidp_bind(struct device *dev)
                goto bind_fail;
        }
 
+       /* We expect to have a maximum of two encoders one for the actual
+        * display and a virtual one for the writeback connector
+        */
+       WARN_ON(drm->mode_config.num_encoder > 2);
+       list_for_each_entry(encoder, &drm->mode_config.encoder_list, head) {
+               encoder->possible_clones =
+                               (1 << drm->mode_config.num_encoder) -  1;
+       }
+
        ret = malidp_irq_init(pdev);
        if (ret < 0)
                goto irq_init_fail;