From 9cdb371940e8db116d3b6686e867c3afbbc28399 Mon Sep 17 00:00:00 2001 From: David Francis Date: Tue, 23 Oct 2018 13:58:39 -0400 Subject: [PATCH 0798/2940] drm/amd/display: Check for dmcu initialization before calling dmcu [Why] DMCU firmware is not required - the system is expected to run fine without it. Therefore, wherever dmcu functions could be called, dmcu initialization shoudl be checked [How] Use the helpful hook dmcu_funcs->is_dmcu_initialized Signed-off-by: David Francis Reviewed-by: Hersen Wu Acked-by: Bhawanpreet Lakha Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/core/dc_link.c | 2 +- drivers/gpu/drm/amd/display/dc/dce/dce_clk_mgr.c | 11 +++++++---- 2 files changed, 8 insertions(+), 5 deletions(-) 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 92171362e755..6344613b82b3 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -2218,7 +2218,7 @@ bool dc_link_set_psr_enable(const struct dc_link *link, bool enable, bool wait) struct dc *core_dc = link->ctx->dc; struct dmcu *dmcu = core_dc->res_pool->dmcu; - if (dmcu != NULL && link->psr_enabled) + if ((dmcu != NULL && dmcu->funcs->is_dmcu_initialized(dmcu)) && link->psr_enabled) dmcu->funcs->set_psr_enable(dmcu, enable, wait); return true; diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/dce/dce_clk_mgr.c index 4c2cb7a11c57..6da7b78ffd73 100644 --- a/drivers/gpu/drm/amd/display/dc/dce/dce_clk_mgr.c +++ b/drivers/gpu/drm/amd/display/dc/dce/dce_clk_mgr.c @@ -274,7 +274,8 @@ static int dce_set_clock( if (requested_clk_khz == 0) clk_mgr_dce->cur_min_clks_state = DM_PP_CLOCKS_STATE_NOMINAL; - dmcu->funcs->set_psr_wait_loop(dmcu, actual_clock / 1000 / 7); + if (dmcu && dmcu->funcs->is_dmcu_initialized(dmcu)) + dmcu->funcs->set_psr_wait_loop(dmcu, actual_clock / 1000 / 7); return actual_clock; } @@ -321,9 +322,11 @@ int dce112_set_clock(struct clk_mgr *clk_mgr, int requested_clk_khz) bp->funcs->set_dce_clock(bp, &dce_clk_params); if (!IS_FPGA_MAXIMUS_DC(core_dc->ctx->dce_environment)) { - if (clk_mgr_dce->dfs_bypass_disp_clk != actual_clock) - dmcu->funcs->set_psr_wait_loop(dmcu, - actual_clock / 1000 / 7); + if (dmcu && dmcu->funcs->is_dmcu_initialized(dmcu)) { + if (clk_mgr_dce->dfs_bypass_disp_clk != actual_clock) + dmcu->funcs->set_psr_wait_loop(dmcu, + actual_clock / 1000 / 7); + } } clk_mgr_dce->dfs_bypass_disp_clk = actual_clock; -- 2.17.1