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Tue, 14 Jul 2020 15:13:13 +0800 (CST) From: Chen-Yu Tsai To: Maxime Ripard , Rob Herring , Sam Ravnborg , Thierry Reding , David Airlie , Daniel Vetter Subject: [PATCH 1/5] dt-bindings: display: panel-dpi: Add bits-per-color property Date: Tue, 14 Jul 2020 15:13:01 +0800 Message-Id: <20200714071305.18492-2-wens@kernel.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200714071305.18492-1-wens@kernel.org> References: <20200714071305.18492-1-wens@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200714_031321_310576_E05BE7F7 X-CRM114-Status: GOOD ( 11.23 ) X-Spam-Score: -5.2 (-----) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-5.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at https://www.dnswl.org/, high trust [198.145.29.99 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Chen-Yu Tsai , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, Siarhei Siamashka Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org From: Chen-Yu Tsai Some LCD panels do not support 24-bit true color, or 8bits per channel RGB. Many low end ones only support up to 6 bits per channel natively. Add a device tree property to describe the native bit depth of the panel. This is separate from the bus width or format of the connection to the display output. Signed-off-by: Chen-Yu Tsai --- .../devicetree/bindings/display/panel/panel-dpi.yaml | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/display/panel/panel-dpi.yaml b/Documentation/devicetree/bindings/display/panel/panel-dpi.yaml index 0cd74c8dab42..8eb013fb1969 100644 --- a/Documentation/devicetree/bindings/display/panel/panel-dpi.yaml +++ b/Documentation/devicetree/bindings/display/panel/panel-dpi.yaml @@ -26,6 +26,9 @@ properties: height-mm: true label: true panel-timing: true + bits-per-color: + description: + Shall contain an integer describing the number of bits per color. port: true power-supply: true reset-gpios: true @@ -42,6 +45,7 @@ examples: panel { compatible = "osddisplays,osd057T0559-34ts", "panel-dpi"; label = "osddisplay"; + bits-per-color = <8>; power-supply = <&vcc_supply>; backlight = <&backlight>;