drm/amd/display: exit PSR during detection

[Why]
If 48mhz refclk is turned off during PSR, we will have issue doing
link training during detection.

[How]
Get out of PSR before detection

Signed-off-by: Eric Yang <Eric.Yang2@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/clk_mgr.c
index c43797b..8828dd9 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/clk_mgr.c
@@ -65,6 +65,31 @@ int clk_mgr_helper_get_active_display_cnt(
        return display_count;
 }
 
+void clk_mgr_exit_optimized_pwr_state(const struct dc *dc, struct clk_mgr *clk_mgr)
+{
+       struct dc_link *edp_link = get_edp_link(dc);
+
+       if (dc->hwss.exit_optimized_pwr_state)
+               dc->hwss.exit_optimized_pwr_state(dc, dc->current_state);
+
+       if (edp_link) {
+               clk_mgr->psr_allow_active_cache = edp_link->psr_allow_active;
+               dc_link_set_psr_allow_active(edp_link, false, false);
+       }
+
+}
+
+void clk_mgr_optimize_pwr_state(const struct dc *dc, struct clk_mgr *clk_mgr)
+{
+       struct dc_link *edp_link = get_edp_link(dc);
+
+       if (edp_link)
+               dc_link_set_psr_allow_active(edp_link, clk_mgr->psr_allow_active_cache, false);
+
+       if (dc->hwss.optimize_pwr_state)
+               dc->hwss.optimize_pwr_state(dc, dc->current_state);
+
+}
 
 struct clk_mgr *dc_clk_mgr_create(struct dc_context *ctx, struct pp_smu_funcs *pp_smu, struct dccg *dccg)
 {

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
index a560e61..46c4fff 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -1074,15 +1074,14 @@ bool dc_link_detect(struct dc_link *link, enum dc_detect_reason reason)
 {
        const struct dc *dc = link->dc;
        bool ret;
-       /* get out of low power state */
 
-       if (dc->hwss.exit_optimized_pwr_state)
-               dc->hwss.exit_optimized_pwr_state(dc, dc->current_state);
+       /* get out of low power state */
+       clk_mgr_exit_optimized_pwr_state(dc, dc->clk_mgr);
 
        ret = dc_link_detect_helper(link, reason);
 
-       if (dc->hwss.optimize_pwr_state)
-               dc->hwss.optimize_pwr_state(dc, dc->current_state);
+       /* Go back to power optimized state */
+       clk_mgr_optimize_pwr_state(dc, dc->clk_mgr);
 
        return ret;
 }
@@ -2421,13 +2420,17 @@ bool dc_link_set_abm_disable(const struct dc_link *link)
        return true;
 }
 
-bool dc_link_set_psr_enable(const struct dc_link *link, bool enable, bool wait)
+bool dc_link_set_psr_allow_active(struct dc_link *link, bool allow_active, bool wait)
 {
        struct dc  *core_dc = link->ctx->dc;
        struct dmcu *dmcu = core_dc->res_pool->dmcu;
 
-       if ((dmcu != NULL && dmcu->funcs->is_dmcu_initialized(dmcu)) && link->psr_enabled)
-               dmcu->funcs->set_psr_enable(dmcu, enable, wait);
+
+
+       if ((dmcu != NULL && dmcu->funcs->is_dmcu_initialized(dmcu)) && link->psr_feature_enabled)
+               dmcu->funcs->set_psr_enable(dmcu, allow_active, wait);
+
+       link->psr_allow_active = allow_active;
 
        return true;
 }

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
index 5a0c338..649ed31 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
@@ -2076,11 +2076,11 @@ static bool allow_hpd_rx_irq(const struct dc_link *link)
        return false;
 }
 
-static bool handle_hpd_irq_psr_sink(const struct dc_link *link)
+static bool handle_hpd_irq_psr_sink(struct dc_link *link)
 {
        union dpcd_psr_configuration psr_configuration;
 
-       if (!link->psr_enabled)
+       if (!link->psr_feature_enabled)
                return false;
 
        dm_helpers_dp_read_dpcd(
@@ -2119,8 +2119,8 @@ static bool handle_hpd_irq_psr_sink(const struct dc_link *link)
                                sizeof(psr_error_status.raw));
 
                        /* PSR error, disable and re-enable PSR */
-                       dc_link_set_psr_enable(link, false, true);
-                       dc_link_set_psr_enable(link, true, true);
+                       dc_link_set_psr_allow_active(link, false, true);
+                       dc_link_set_psr_allow_active(link, true, true);
 
                        return true;
                } else if (psr_sink_psr_status.bits.SINK_SELF_REFRESH_STATUS ==

diff --git a/drivers/gpu/drm/amd/display/dc/dc_link.h b/drivers/gpu/drm/amd/display/dc/dc_link.h
index 45e6195..f24fd19 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dc_link.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_link.h
@@ -126,7 +126,8 @@ struct dc_link {
        unsigned short chip_caps;
        unsigned int dpcd_sink_count;
        enum edp_revision edp_revision;
-       bool psr_enabled;
+       bool psr_feature_enabled;
+       bool psr_allow_active;
 
        /* MST record stream using this link */
        struct link_flags {
@@ -158,6 +159,18 @@ static inline struct dc_link *dc_get_link_at_index(struct dc *dc, uint32_t link_
        return dc->links[link_index];
 }
 
+static inline struct dc_link *get_edp_link(const struct dc *dc)
+{
+       int i;
+
+       // report any eDP links, even unconnected DDI's
+       for (i = 0; i < dc->link_count; i++) {
+               if (dc->links[i]->connector_signal == SIGNAL_TYPE_EDP)
+                       return dc->links[i];
+       }
+       return NULL;
+}
+
 /* Set backlight level of an embedded panel (eDP, LVDS).
  * backlight_pwm_u16_16 is unsigned 32 bit with 16 bit integer
  * and 16 bit fractional, where 1.0 is max backlight value.
@@ -170,7 +183,7 @@ int dc_link_get_backlight_level(const struct dc_link *dc_link);
 
 bool dc_link_set_abm_disable(const struct dc_link *dc_link);
 
-bool dc_link_set_psr_enable(const struct dc_link *dc_link, bool enable, bool wait);
+bool dc_link_set_psr_allow_active(struct dc_link *dc_link, bool enable, bool wait);
 
 bool dc_link_get_psr_state(const struct dc_link *dc_link, uint32_t *psr_state);
 

diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
index f8c1b4f..021e406 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
@@ -1410,7 +1410,7 @@ static enum dc_status apply_single_controller_ctx_to_hw(
 
        pipe_ctx->plane_res.scl_data.lb_params.alpha_en = pipe_ctx->bottom_pipe != 0;
 
-       pipe_ctx->stream->link->psr_enabled = false;
+       pipe_ctx->stream->link->psr_feature_enabled = false;
 
        return DC_OK;
 }
@@ -1521,18 +1521,6 @@ static struct dc_stream_state *get_edp_stream(struct dc_state *context)
        return NULL;
 }
 
-static struct dc_link *get_edp_link(struct dc *dc)
-{
-       int i;
-
-       // report any eDP links, even unconnected DDI's
-       for (i = 0; i < dc->link_count; i++) {
-               if (dc->links[i]->connector_signal == SIGNAL_TYPE_EDP)
-                       return dc->links[i];
-       }
-       return NULL;
-}
-
 static struct dc_link *get_edp_link_with_sink(
                struct dc *dc,
                struct dc_state *context)
@@ -1826,7 +1814,7 @@ static bool should_enable_fbc(struct dc *dc,
                return false;
 
        /* PSR should not be enabled */
-       if (pipe_ctx->stream->link->psr_enabled)
+       if (pipe_ctx->stream->link->psr_feature_enabled)
                return false;
 
        /* Nothing to compress */

diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr.h b/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr.h
index 2fdd0ba..f0f3d42 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr.h
@@ -189,6 +189,7 @@ struct clk_mgr {
        struct dc_context *ctx;
        struct clk_mgr_funcs *funcs;
        struct dc_clocks clks;
+       bool psr_allow_active_cache;
        int dprefclk_khz; // Used by program pixel clock in clock source funcs, need to figureout where this goes
 #ifdef CONFIG_DRM_AMD_DC_DCN2_1
        struct clk_bw_params *bw_params;
@@ -202,4 +203,8 @@ struct clk_mgr *dc_clk_mgr_create(struct dc_context *ctx, struct pp_smu_funcs *p
 
 void dc_destroy_clk_mgr(struct clk_mgr *clk_mgr);
 
+void clk_mgr_exit_optimized_pwr_state(const struct dc *dc, struct clk_mgr *clk_mgr);
+
+void clk_mgr_optimize_pwr_state(const struct dc *dc, struct clk_mgr *clk_mgr);
+
 #endif /* __DAL_CLK_MGR_H__ */