From: Rajeev Nandan <rajeevny@codeaurora.org> To: dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org, devicetree@vger.kernel.org Cc: Rajeev Nandan <rajeevny@codeaurora.org>, linux-kernel@vger.kernel.org, robdclark@gmail.com, dianders@chromium.org, mkrishn@codeaurora.org, kalyan_t@codeaurora.org, hoegsberg@chromium.org, abhinavk@codeaurora.org, seanpaul@chromium.org Subject: [v3 0/2] drm: Add support for backlight control of eDP panel on ti-sn65dsi86 bridge Date: Mon, 26 Apr 2021 11:29:14 +0530 [thread overview] Message-ID: <1619416756-3533-1-git-send-email-rajeevny@codeaurora.org> (raw) The backlight level of an eDP panel can be controlled through the AUX channel using DPCD registers of the panel. The capability for the Source device to adjust backlight characteristics within the panel, using the Sink device DPCD registers is indicated by the TCON_BACKLIGHT_ADJUSTMENT_CAPABLE bit in the EDP_GENERAL_CAPABILITY_1 register (DPCD Address 701h, bit0). In this configuration, the eDP TCON receives the backlight level information from the host, through the AUX channel. Anderson's patch series [1] exposed the DDC bus from ti-sn65dsi86 bridge, that gives an option to move the backlight control out of the bridge and to create a separate backlight driver. Changes in v2: - Created a new DisplayPort aux backlight driver and moved the code from drm_dp_aux_backlight.c (v1) to the new driver. - Removed the changes done in ti-sn65dsi86 bridge. (Rob Herring) Changes in v3: - Add missing ';' to fix module compilation (kernel test bot) [1] https://lore.kernel.org/dri-devel/20210416223950.3586967-1-dianders@chromium.org/ Rajeev Nandan (2): dt-bindings: backlight: add DisplayPort aux backlight backlight: Add DisplayPort aux backlight driver .../bindings/leds/backlight/dp-aux-backlight.yaml | 49 +++++ drivers/video/backlight/Kconfig | 7 + drivers/video/backlight/Makefile | 1 + drivers/video/backlight/dp_aux_backlight.c | 245 +++++++++++++++++++++ 4 files changed, 302 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/backlight/dp-aux-backlight.yaml create mode 100644 drivers/video/backlight/dp_aux_backlight.c -- 2.7.4
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From: Rajeev Nandan <rajeevny@codeaurora.org> To: dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org, devicetree@vger.kernel.org Cc: mkrishn@codeaurora.org, Rajeev Nandan <rajeevny@codeaurora.org>, linux-kernel@vger.kernel.org, abhinavk@codeaurora.org, dianders@chromium.org, seanpaul@chromium.org, kalyan_t@codeaurora.org, hoegsberg@chromium.org Subject: [v3 0/2] drm: Add support for backlight control of eDP panel on ti-sn65dsi86 bridge Date: Mon, 26 Apr 2021 11:29:14 +0530 [thread overview] Message-ID: <1619416756-3533-1-git-send-email-rajeevny@codeaurora.org> (raw) The backlight level of an eDP panel can be controlled through the AUX channel using DPCD registers of the panel. The capability for the Source device to adjust backlight characteristics within the panel, using the Sink device DPCD registers is indicated by the TCON_BACKLIGHT_ADJUSTMENT_CAPABLE bit in the EDP_GENERAL_CAPABILITY_1 register (DPCD Address 701h, bit0). In this configuration, the eDP TCON receives the backlight level information from the host, through the AUX channel. Anderson's patch series [1] exposed the DDC bus from ti-sn65dsi86 bridge, that gives an option to move the backlight control out of the bridge and to create a separate backlight driver. Changes in v2: - Created a new DisplayPort aux backlight driver and moved the code from drm_dp_aux_backlight.c (v1) to the new driver. - Removed the changes done in ti-sn65dsi86 bridge. (Rob Herring) Changes in v3: - Add missing ';' to fix module compilation (kernel test bot) [1] https://lore.kernel.org/dri-devel/20210416223950.3586967-1-dianders@chromium.org/ Rajeev Nandan (2): dt-bindings: backlight: add DisplayPort aux backlight backlight: Add DisplayPort aux backlight driver .../bindings/leds/backlight/dp-aux-backlight.yaml | 49 +++++ drivers/video/backlight/Kconfig | 7 + drivers/video/backlight/Makefile | 1 + drivers/video/backlight/dp_aux_backlight.c | 245 +++++++++++++++++++++ 4 files changed, 302 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/backlight/dp-aux-backlight.yaml create mode 100644 drivers/video/backlight/dp_aux_backlight.c -- 2.7.4 _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
next reply other threads:[~2021-04-26 6:00 UTC|newest] Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-04-26 5:59 Rajeev Nandan [this message] 2021-04-26 5:59 ` [v3 0/2] drm: Add support for backlight control of eDP panel on ti-sn65dsi86 bridge Rajeev Nandan 2021-04-26 5:59 ` [v3 1/2] dt-bindings: backlight: add DisplayPort aux backlight Rajeev Nandan 2021-04-26 5:59 ` Rajeev Nandan 2021-04-26 21:04 ` Rob Herring 2021-04-26 21:04 ` Rob Herring 2021-04-29 18:04 ` Rob Herring 2021-04-29 18:04 ` Rob Herring 2021-04-29 21:03 ` Doug Anderson 2021-04-29 21:03 ` Doug Anderson 2021-04-30 15:10 ` rajeevny 2021-04-30 15:10 ` rajeevny 2021-04-30 21:38 ` Doug Anderson 2021-04-30 21:38 ` Doug Anderson 2021-05-11 18:11 ` rajeevny 2021-05-11 18:11 ` rajeevny 2021-05-11 22:33 ` Laurent Pinchart 2021-05-11 22:33 ` Laurent Pinchart 2021-05-11 23:17 ` Doug Anderson 2021-05-11 23:17 ` Doug Anderson 2021-05-17 20:21 ` Doug Anderson 2021-05-17 20:21 ` Doug Anderson 2021-05-25 8:03 ` rajeevny 2021-05-25 8:03 ` rajeevny 2021-04-26 5:59 ` [v3 2/2] backlight: Add DisplayPort aux backlight driver Rajeev Nandan 2021-04-26 5:59 ` Rajeev Nandan 2021-04-26 9:49 ` Jani Nikula 2021-04-26 9:49 ` [Intel-gfx] " Jani Nikula 2021-04-26 9:49 ` Jani Nikula 2021-04-26 14:57 ` rajeevny 2021-04-26 14:57 ` [Intel-gfx] " rajeevny 2021-04-26 14:57 ` rajeevny 2021-04-30 18:48 ` Lyude Paul 2021-04-30 18:48 ` Lyude Paul 2021-04-30 18:48 ` [Intel-gfx] " Lyude Paul
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