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Wed, 28 Jan 2026 05:28:20 -0800 (PST) Date: Wed, 28 Jan 2026 16:28:17 +0300 From: Dan Carpenter To: ChanSoo Shin Cc: andy@kernel.org, gregkh@linuxfoundation.org, dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-staging@lists.linux.dev Subject: Re: [PATCH] fbtft: Improve damage_range to mark only changed rows Message-ID: References: <20260128130503.868466-1-csshin9928@gmail.com> Precedence: bulk X-Mailing-List: linux-staging@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260128130503.868466-1-csshin9928@gmail.com> On Wed, Jan 28, 2026 at 10:05:03PM +0900, ChanSoo Shin wrote: > Instead of marking the entire display as dirty, calculate > start_row and end_row based on off/len and mark only those rows. > This improves performance for partial framebuffer updates. > > Signed-off-by: ChanSoo Shin > --- This is v3 but it's not marked or described. Have you tested this patch? What was the speed up? regards, dan carpenter