From b8a2948fa2b3a5a6da67fd57aa01c7318d795125 Mon Sep 17 00:00:00 2001 From: Sean Paul Date: Thu, 11 Jul 2019 13:34:53 -0700 Subject: [PATCH] drm/panel: simple: Add ability to override typical timing MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit This patch adds the ability to override the typical display timing for a given panel. This is useful for devices which have timing constraints that do not apply across the entire display driver (eg: to avoid crosstalk between panel and digitizer on certain laptops). The rules are as follows: - panel must not specify fixed mode (since the override mode will either be the same as the fixed mode, or we'll be unable to check the bounds of the overried) - panel must specify at least one display_timing range which will be used to ensure the override mode fits within its bounds Changes in v2: - Parse the full display-timings node (using the native-mode) (Rob) Changes in v3: - No longer parse display-timings subnode, use panel-timing (Rob) Changes in v4: - Don't add mode from timing if override was specified (Thierry) - Add warning if timing and fixed mode was specified (Thierry) - Don't add fixed mode if timing was specified (Thierry) - Refactor/rename a bit to avoid extra indentation from "if" tests - i should be unsigned (Thierry) - Add annoying WARN_ONs for some cases (Thierry) - Simplify 'No display_timing found' handling (Thierry) - Rename to panel_simple_parse_override_mode() (Thierry) Changes in v5: - Added Heiko's Tested-by Changes in v6: - Rebased to drm-misc next - Added tags Cc: Doug Anderson Cc: Eric Anholt Cc: Heiko Stuebner Cc: Jeffy Chen Cc: Rob Herring Cc: Stéphane Marchesin Cc: Thierry Reding Cc: devicetree@vger.kernel.org Cc: dri-devel@lists.freedesktop.org Signed-off-by: Sean Paul Tested-by: Enric Balletbo i Serra Signed-off-by: Douglas Anderson Tested-by: Heiko Stuebner Reviewed-by: Boris Brezillon Acked-by: Thierry Reding Signed-off-by: Sam Ravnborg Link: https://patchwork.freedesktop.org/patch/msgid/20190711203455.125667-2-dianders@chromium.org --- drivers/gpu/drm/panel/panel-simple.c | 109 +++++++++++++++++++++++++-- 1 file changed, 104 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c index af6bf5611b4e..1bee197821ef 100644 --- a/drivers/gpu/drm/panel/panel-simple.c +++ b/drivers/gpu/drm/panel/panel-simple.c @@ -30,6 +30,7 @@ #include #include