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Most platforms support 2 or 4 MST streams, while platforms without MST support default to a single stream (`DEFAULT_STREAM_COUNT = 1`). This change also accounts for platforms with asymmetric stream support, e.g., DP0 supporting 4 streams and DP1 supporting 2. Signed-off-by: Abhinav Kumar Signed-off-by: Yongxing Mou --- drivers/gpu/drm/msm/dp/dp_display.c | 21 +++++++++++++++++++++ drivers/gpu/drm/msm/dp/dp_display.h | 1 + 2 files changed, 22 insertions(+) diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 78d932bceb581ee54116926506b1025bd159108f..a8477a0a180137f15cbb1401c3964636aa32626c 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -33,6 +33,7 @@ module_param(psr_enabled, bool, 0); MODULE_PARM_DESC(psr_enabled, "enable PSR for eDP and DP displays"); #define HPD_STRING_SIZE 30 +#define DEFAULT_STREAM_COUNT 1 enum { ISR_DISCONNECTED, @@ -52,6 +53,7 @@ struct msm_dp_display_private { bool core_initialized; bool phy_initialized; bool audio_supported; + bool mst_supported; struct drm_device *drm_dev; @@ -84,12 +86,15 @@ struct msm_dp_display_private { void __iomem *p0_base; size_t p0_len; + + int max_stream; }; struct msm_dp_desc { phys_addr_t io_start; unsigned int id; bool wide_bus_supported; + int mst_streams; }; static const struct msm_dp_desc msm_dp_desc_sa8775p[] = { @@ -1213,6 +1218,15 @@ static int msm_dp_display_get_io(struct msm_dp_display_private *display) return 0; } +int msm_dp_get_mst_max_stream(struct msm_dp *msm_dp_display) +{ + struct msm_dp_display_private *dp; + + dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display); + + return dp->max_stream; +} + static int msm_dp_display_probe(struct platform_device *pdev) { int rc = 0; @@ -1239,6 +1253,13 @@ static int msm_dp_display_probe(struct platform_device *pdev) dp->msm_dp_display.is_edp = (dp->msm_dp_display.connector_type == DRM_MODE_CONNECTOR_eDP); dp->hpd_isr_status = 0; + dp->max_stream = DEFAULT_STREAM_COUNT; + dp->mst_supported = FALSE; + + if (desc->mst_streams > DEFAULT_STREAM_COUNT) { + dp->max_stream = desc->mst_streams; + dp->mst_supported = TRUE; + } rc = msm_dp_display_get_io(dp); if (rc) diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h index 37c6e87db90ce951274cdae61f26d76dc9ef3840..7727cf325a89b4892d2370a5616c4fa76fc88485 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.h +++ b/drivers/gpu/drm/msm/dp/dp_display.h @@ -29,6 +29,7 @@ struct msm_dp { bool psr_supported; }; +int msm_dp_get_mst_max_stream(struct msm_dp *msm_dp_display); int msm_dp_display_get_modes(struct msm_dp *msm_dp_display); bool msm_dp_display_check_video_test(struct msm_dp *msm_dp_display); int msm_dp_display_get_test_bpp(struct msm_dp *msm_dp_display); -- 2.34.1