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Thu, 25 Jan 2024 15:02:41 -0800 (PST) Received: from umbar.lan ([192.130.178.91]) by smtp.gmail.com with ESMTPSA id x19-20020a2e8813000000b002cdfc29b46dsm405872ljh.88.2024.01.25.15.02.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 25 Jan 2024 15:02:41 -0800 (PST) From: Dmitry Baryshkov Date: Fri, 26 Jan 2024 01:02:35 +0200 Subject: [PATCH v3 06/15] drm/msm/dp: simplify stream clocks handling Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240126-dp-power-parser-cleanup-v3-6-e2e46f4d390c@linaro.org> References: <20240126-dp-power-parser-cleanup-v3-0-e2e46f4d390c@linaro.org> In-Reply-To: <20240126-dp-power-parser-cleanup-v3-0-e2e46f4d390c@linaro.org> To: Rob Clark , Abhinav Kumar , Dmitry Baryshkov , Sean Paul , Marijn Suijten , David Airlie , Daniel Vetter , Kuogee Hsieh , Stephen Boyd Cc: linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, Bjorn Andersson , Konrad Dybcio X-Mailer: b4 0.12.4 X-Developer-Signature: v=1; a=openpgp-sha256; l=10486; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=hNPMvZ0gaSY5MPKRR/EBckDQolNgLCvX0skn+OxZNXs=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBlsuiHV6v0Kep+L6fjq5tRTo4o9LTRMqscbFhJn vjCUEpbNF2JATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCZbLohwAKCRCLPIo+Aiko 1fFUB/4wvPOAix/8rLxszNHOJxHll/IdBK1rqgrLBjORLkZKiMc+JJzJWpmZC57B96An7qYB7k1 pmGu/J9N7vSv1ZafAsh01xl7ntCIZadgvTvvzLihHtFwRAVO8WMISUM3E8dbkMw5q9IRYIUNUHq xilkwvhRuxtCxMkGsDyB8A3wf7WD3Ys2V3G8NCmlVqWGRC+u4T7ePi4Vl0WLvbe7yEuhYbC/NWK 6vhynkIKaJOV64ez88h9cL0RiAlzyYvE2/zKeEZbpcorXK3cZANbcmY17irz2JGhbsu+ZdRjpDI veVW2c0/F9iVyuibXU646kLlmFbw/tA8yw+ku8mCY4+nZEMn X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A There is only a single DP_STREAM_PM clock, stream_pixel. Instead of using a separate dss_module_power instance for this single clock, handle this clock directly. This allows us to drop several wrapping functions. Signed-off-by: Dmitry Baryshkov --- drivers/gpu/drm/msm/dp/dp_ctrl.c | 91 ++++++++++++++++---------------------- drivers/gpu/drm/msm/dp/dp_parser.c | 41 ++++------------- drivers/gpu/drm/msm/dp/dp_parser.h | 2 - 3 files changed, 47 insertions(+), 87 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c index da29281c575b..56a424a82a1b 100644 --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c @@ -79,6 +79,8 @@ struct dp_ctrl_private { struct dp_parser *parser; struct dp_catalog *catalog; + struct clk *pixel_clk; + struct completion idle_comp; struct completion psr_op_comp; struct completion video_comp; @@ -1320,27 +1322,6 @@ static int dp_ctrl_setup_main_link(struct dp_ctrl_private *ctrl, return ret; } -static void dp_ctrl_set_clock_rate(struct dp_ctrl_private *ctrl, - enum dp_pm_type module, char *name, unsigned long rate) -{ - u32 num = ctrl->parser->mp[module].num_clk; - struct clk_bulk_data *cfg = ctrl->parser->mp[module].clocks; - - while (num && strcmp(cfg->id, name)) { - num--; - cfg++; - } - - drm_dbg_dp(ctrl->drm_dev, "setting rate=%lu on clk=%s\n", - rate, name); - - if (num) - clk_set_rate(cfg->clk, rate); - else - DRM_ERROR("%s clock doesn't exit to set rate %lu\n", - name, rate); -} - int dp_ctrl_clk_enable(struct dp_ctrl *dp_ctrl, enum dp_pm_type pm_type, bool enable) { @@ -1351,8 +1332,7 @@ int dp_ctrl_clk_enable(struct dp_ctrl *dp_ctrl, ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); if (pm_type != DP_CORE_PM && - pm_type != DP_CTRL_PM && - pm_type != DP_STREAM_PM) { + pm_type != DP_CTRL_PM) { DRM_ERROR("unsupported ctrl module: %s\n", dp_parser_pm_name(pm_type)); return -EINVAL; @@ -1371,12 +1351,6 @@ int dp_ctrl_clk_enable(struct dp_ctrl *dp_ctrl, return 0; } - if (pm_type == DP_STREAM_PM && ctrl->stream_clks_on) { - drm_dbg_dp(ctrl->drm_dev, - "pixel clks already enabled\n"); - return 0; - } - if ((pm_type == DP_CTRL_PM) && (!ctrl->core_clks_on)) { drm_dbg_dp(ctrl->drm_dev, "Enable core clks before link clks\n"); @@ -1401,8 +1375,6 @@ int dp_ctrl_clk_enable(struct dp_ctrl *dp_ctrl, if (pm_type == DP_CORE_PM) ctrl->core_clks_on = enable; - else if (pm_type == DP_STREAM_PM) - ctrl->stream_clks_on = enable; else ctrl->link_clks_on = enable; @@ -1734,14 +1706,23 @@ static int dp_ctrl_process_phy_test_request(struct dp_ctrl_private *ctrl) } pixel_rate = ctrl->panel->dp_mode.drm_mode.clock; - dp_ctrl_set_clock_rate(ctrl, DP_STREAM_PM, "stream_pixel", pixel_rate * 1000); - - ret = dp_ctrl_clk_enable(&ctrl->dp_ctrl, DP_STREAM_PM, true); + ret = clk_set_rate(ctrl->pixel_clk, pixel_rate * 1000); if (ret) { - DRM_ERROR("Failed to start pixel clocks. ret=%d\n", ret); + DRM_ERROR("Failed to set pixel clock rate. ret=%d\n", ret); return ret; } + if (ctrl->stream_clks_on) { + drm_dbg_dp(ctrl->drm_dev, "pixel clks already enabled\n"); + } else { + ret = clk_prepare_enable(ctrl->pixel_clk); + if (ret) { + DRM_ERROR("Failed to start pixel clocks. ret=%d\n", ret); + return ret; + } + ctrl->stream_clks_on = true; + } + dp_ctrl_send_phy_test_pattern(ctrl); return 0; @@ -1977,14 +1958,23 @@ int dp_ctrl_on_stream(struct dp_ctrl *dp_ctrl, bool force_link_train) } } - dp_ctrl_set_clock_rate(ctrl, DP_STREAM_PM, "stream_pixel", pixel_rate * 1000); - - ret = dp_ctrl_clk_enable(&ctrl->dp_ctrl, DP_STREAM_PM, true); + ret = clk_set_rate(ctrl->pixel_clk, pixel_rate * 1000); if (ret) { - DRM_ERROR("Unable to start pixel clocks. ret=%d\n", ret); + DRM_ERROR("Failed to set pixel clock rate. ret=%d\n", ret); goto end; } + if (ctrl->stream_clks_on) { + drm_dbg_dp(ctrl->drm_dev, "pixel clks already enabled\n"); + } else { + ret = clk_prepare_enable(ctrl->pixel_clk); + if (ret) { + DRM_ERROR("Failed to start pixel clocks. ret=%d\n", ret); + goto end; + } + ctrl->stream_clks_on = true; + } + if (force_link_train || !dp_ctrl_channel_eq_ok(ctrl)) dp_ctrl_link_retrain(ctrl); @@ -2036,11 +2026,8 @@ int dp_ctrl_off_link_stream(struct dp_ctrl *dp_ctrl) dp_catalog_ctrl_mainlink_ctrl(ctrl->catalog, false); if (ctrl->stream_clks_on) { - ret = dp_ctrl_clk_enable(&ctrl->dp_ctrl, DP_STREAM_PM, false); - if (ret) { - DRM_ERROR("Failed to disable pclk. ret=%d\n", ret); - return ret; - } + clk_disable_unprepare(ctrl->pixel_clk); + ctrl->stream_clks_on = false; } dev_pm_opp_set_rate(ctrl->dev, 0); @@ -2108,9 +2095,10 @@ int dp_ctrl_off(struct dp_ctrl *dp_ctrl) dp_catalog_ctrl_reset(ctrl->catalog); - ret = dp_ctrl_clk_enable(&ctrl->dp_ctrl, DP_STREAM_PM, false); - if (ret) - DRM_ERROR("Failed to disable pixel clocks. ret=%d\n", ret); + if (ctrl->stream_clks_on) { + clk_disable_unprepare(ctrl->pixel_clk); + ctrl->stream_clks_on = false; + } dev_pm_opp_set_rate(ctrl->dev, 0); ret = dp_ctrl_clk_enable(&ctrl->dp_ctrl, DP_CTRL_PM, false); @@ -2174,7 +2162,7 @@ static int dp_ctrl_clk_init(struct dp_ctrl *dp_ctrl) { struct dp_ctrl_private *ctrl_private; int rc = 0; - struct dss_module_power *core, *ctrl, *stream; + struct dss_module_power *core, *ctrl; struct device *dev; ctrl_private = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); @@ -2182,7 +2170,6 @@ static int dp_ctrl_clk_init(struct dp_ctrl *dp_ctrl) core = &ctrl_private->parser->mp[DP_CORE_PM]; ctrl = &ctrl_private->parser->mp[DP_CTRL_PM]; - stream = &ctrl_private->parser->mp[DP_STREAM_PM]; rc = devm_clk_bulk_get(dev, core->num_clk, core->clocks); if (rc) @@ -2192,9 +2179,9 @@ static int dp_ctrl_clk_init(struct dp_ctrl *dp_ctrl) if (rc) return -ENODEV; - rc = devm_clk_bulk_get(dev, stream->num_clk, stream->clocks); - if (rc) - return -ENODEV; + ctrl_private->pixel_clk = devm_clk_get(dev, "stream_pixel"); + if (IS_ERR(ctrl_private->pixel_clk)) + return PTR_ERR(ctrl_private->pixel_clk); return 0; } diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c index 2d9d126c119b..fe2b75f7555a 100644 --- a/drivers/gpu/drm/msm/dp/dp_parser.c +++ b/drivers/gpu/drm/msm/dp/dp_parser.c @@ -150,12 +150,11 @@ static inline bool dp_parser_check_prefix(const char *clk_prefix, static int dp_parser_init_clk_data(struct dp_parser *parser) { int num_clk, i, rc; - int core_clk_count = 0, ctrl_clk_count = 0, stream_clk_count = 0; + int core_clk_count = 0, ctrl_clk_count = 0; const char *clk_name; struct device *dev = &parser->pdev->dev; struct dss_module_power *core_power = &parser->mp[DP_CORE_PM]; struct dss_module_power *ctrl_power = &parser->mp[DP_CTRL_PM]; - struct dss_module_power *stream_power = &parser->mp[DP_STREAM_PM]; num_clk = of_property_count_strings(dev->of_node, "clock-names"); if (num_clk <= 0) { @@ -174,9 +173,6 @@ static int dp_parser_init_clk_data(struct dp_parser *parser) if (dp_parser_check_prefix("ctrl", clk_name)) ctrl_clk_count++; - - if (dp_parser_check_prefix("stream", clk_name)) - stream_clk_count++; } /* Initialize the CORE power module */ @@ -207,47 +203,30 @@ static int dp_parser_init_clk_data(struct dp_parser *parser) return -ENOMEM; } - /* Initialize the STREAM power module */ - if (stream_clk_count == 0) { - DRM_ERROR("no stream (pixel) clocks are defined\n"); - return -EINVAL; - } - - stream_power->num_clk = stream_clk_count; - stream_power->clocks = devm_kcalloc(dev, - stream_power->num_clk, sizeof(struct clk_bulk_data), - GFP_KERNEL); - if (!stream_power->clocks) { - stream_power->num_clk = 0; - return -ENOMEM; - } - - return 0; + return num_clk; } static int dp_parser_clock(struct dp_parser *parser) { int rc = 0, i = 0; int num_clk = 0; - int core_clk_index = 0, ctrl_clk_index = 0, stream_clk_index = 0; - int core_clk_count = 0, ctrl_clk_count = 0, stream_clk_count = 0; + int core_clk_index = 0, ctrl_clk_index = 0; + int core_clk_count = 0, ctrl_clk_count = 0; const char *clk_name; struct device *dev = &parser->pdev->dev; struct dss_module_power *core_power = &parser->mp[DP_CORE_PM]; struct dss_module_power *ctrl_power = &parser->mp[DP_CTRL_PM]; - struct dss_module_power *stream_power = &parser->mp[DP_STREAM_PM]; rc = dp_parser_init_clk_data(parser); - if (rc) { + if (rc < 0) { DRM_ERROR("failed to initialize power data %d\n", rc); - return -EINVAL; + return rc; } + num_clk = rc; + core_clk_count = core_power->num_clk; ctrl_clk_count = ctrl_power->num_clk; - stream_clk_count = stream_power->num_clk; - - num_clk = core_clk_count + ctrl_clk_count + stream_clk_count; for (i = 0; i < num_clk; i++) { rc = of_property_read_string_index(dev->of_node, "clock-names", @@ -260,10 +239,6 @@ static int dp_parser_clock(struct dp_parser *parser) core_clk_index < core_clk_count) { core_power->clocks[core_clk_index].id = devm_kstrdup(dev, clk_name, GFP_KERNEL); core_clk_index++; - } else if (dp_parser_check_prefix("stream", clk_name) && - stream_clk_index < stream_clk_count) { - stream_power->clocks[stream_clk_index].id = devm_kstrdup(dev, clk_name, GFP_KERNEL); - stream_clk_index++; } else if (dp_parser_check_prefix("ctrl", clk_name) && ctrl_clk_index < ctrl_clk_count) { ctrl_power->clocks[ctrl_clk_index].id = devm_kstrdup(dev, clk_name, GFP_KERNEL); diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h index 4ccc432b4142..c6fe26602e07 100644 --- a/drivers/gpu/drm/msm/dp/dp_parser.h +++ b/drivers/gpu/drm/msm/dp/dp_parser.h @@ -19,7 +19,6 @@ enum dp_pm_type { DP_CORE_PM, DP_CTRL_PM, - DP_STREAM_PM, DP_MAX_PM }; @@ -40,7 +39,6 @@ static inline const char *dp_parser_pm_name(enum dp_pm_type module) switch (module) { case DP_CORE_PM: return "DP_CORE_PM"; case DP_CTRL_PM: return "DP_CTRL_PM"; - case DP_STREAM_PM: return "DP_STREAM_PM"; default: return "???"; } }