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Fri, 03 Nov 2023 05:29:06 -0700 (PDT) From: Bryan O'Donoghue Date: Fri, 03 Nov 2023 12:29:02 +0000 Subject: [PATCH v4 5/7] media: qcom: camss: Add support for named power-domains MIME-Version: 1.0 Message-Id: <20231103-b4-camss-named-power-domains-v4-5-33a905359dbc@linaro.org> References: <20231103-b4-camss-named-power-domains-v4-0-33a905359dbc@linaro.org> In-Reply-To: <20231103-b4-camss-named-power-domains-v4-0-33a905359dbc@linaro.org> To: hverkuil-cisco@xs4all.nl, laurent.pinchart@ideasonboard.com, Robert Foss , Todor Tomov , Bryan O'Donoghue , Andy Gross , Bjorn Andersson , Konrad Dybcio , Mauro Carvalho Chehab , matti.lehtimaki@gmail.com, quic_grosikop@quicinc.com Cc: linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.13-dev-26615 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (snail.vger.email [0.0.0.0]); Fri, 03 Nov 2023 05:29:50 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1781545924345281235 X-GMAIL-MSGID: 1781545924345281235 Right now we use fixed indexes to assign power-domains, with a requirement for the TOP GDSC to come last in the list. Adding support for named power-domains means the declaration in the dtsi can come in any order. After this change we continue to support the old indexing - if a SoC resource declaration or the in-use dtb doesn't declare power-domain names we fall back to the default legacy indexing. From this point on though new SoC additions should contain named power-domains, eventually we will drop support for legacy indexing. Tested-by: Matti Lehtimäki Signed-off-by: Bryan O'Donoghue --- drivers/media/platform/qcom/camss/camss-vfe.c | 24 +++++++++++++++++++++++- drivers/media/platform/qcom/camss/camss.c | 26 +++++++++++++++++++++----- drivers/media/platform/qcom/camss/camss.h | 2 ++ 3 files changed, 46 insertions(+), 6 deletions(-) diff --git a/drivers/media/platform/qcom/camss/camss-vfe.c b/drivers/media/platform/qcom/camss/camss-vfe.c index defff24f07ce3..123e5ead7602d 100644 --- a/drivers/media/platform/qcom/camss/camss-vfe.c +++ b/drivers/media/platform/qcom/camss/camss-vfe.c @@ -1382,7 +1382,29 @@ int msm_vfe_subdev_init(struct camss *camss, struct vfe_device *vfe, if (!res->line_num) return -EINVAL; - if (res->has_pd) { + /* Power domain */ + + if (res->pd_name) { + vfe->genpd = dev_pm_domain_attach_by_name(camss->dev, + res->pd_name); + if (IS_ERR(vfe->genpd)) { + ret = PTR_ERR(vfe->genpd); + return ret; + } + } + + if (!vfe->genpd && res->has_pd) { + /* + * Legacy magic index. + * Requires + * power-domain = , + * , + * + * id must correspondng to the index of the VFE which must + * come before the TOP GDSC. VFE Lite has no individually + * collapasible domain which is why id < vfe_num is a valid + * check. + */ vfe->genpd = dev_pm_domain_attach_by_id(camss->dev, id); if (IS_ERR(vfe->genpd)) { ret = PTR_ERR(vfe->genpd); diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/platform/qcom/camss/camss.c index f10a47f1aee7d..d565260fee0d6 100644 --- a/drivers/media/platform/qcom/camss/camss.c +++ b/drivers/media/platform/qcom/camss/camss.c @@ -1523,12 +1523,28 @@ static int camss_configure_pd(struct camss *camss) return 0; /* - * VFE power domains are in the beginning of the list, and while all - * power domains should be attached, only if TITAN_TOP power domain is - * found in the list, it should be linked over here. + * If a power-domain name is defined try to use it. + * It is possible we are running a new kernel with an old dtb so + * fallback to indexes even if a pd_name is defined but not found. */ - camss->genpd = dev_pm_domain_attach_by_id(camss->dev, camss->genpd_num - 1); - if (IS_ERR(camss->genpd)) { + if (camss->res->pd_name) { + camss->genpd = dev_pm_domain_attach_by_name(camss->dev, + camss->res->pd_name); + if (IS_ERR(camss->genpd)) { + ret = PTR_ERR(camss->genpd); + goto fail_pm; + } + } + + if (!camss->genpd) { + /* + * Legacy magic index. TITAN_TOP GDSC must be the last + * item in the power-domain list. + */ + camss->genpd = dev_pm_domain_attach_by_id(camss->dev, + camss->genpd_num - 1); + } + if (IS_ERR_OR_NULL(camss->genpd)) { ret = PTR_ERR(camss->genpd); goto fail_pm; } diff --git a/drivers/media/platform/qcom/camss/camss.h b/drivers/media/platform/qcom/camss/camss.h index 1ba824a2cb76c..cd8186fe1797b 100644 --- a/drivers/media/platform/qcom/camss/camss.h +++ b/drivers/media/platform/qcom/camss/camss.h @@ -48,6 +48,7 @@ struct camss_subdev_resources { u32 clock_rate[CAMSS_RES_MAX][CAMSS_RES_MAX]; char *reg[CAMSS_RES_MAX]; char *interrupt[CAMSS_RES_MAX]; + char *pd_name; u8 line_num; bool has_pd; const void *ops; @@ -84,6 +85,7 @@ enum icc_count { struct camss_resources { enum camss_version version; + const char *pd_name; const struct camss_subdev_resources *csiphy_res; const struct camss_subdev_resources *csid_res; const struct camss_subdev_resources *ispif_res;