From: Jani Nikula <jani.nikula@linux.intel.com>
To: Lyude Paul <lyude@redhat.com>,
dri-devel@lists.freedesktop.org, nouveau@lists.freedesktop.org,
intel-gfx@lists.freedesktop.org
Cc: David Airlie <airlied@linux.ie>,
Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
open list <linux-kernel@vger.kernel.org>,
Sean Paul <seanpaul@chromium.org>,
Daniel Vetter <daniel@ffwll.ch>,
Rodrigo Vivi <rodrigo.vivi@intel.com>
Subject: Re: [Nouveau] [RFC v4 05/11] drm/i915/dpcd_bl: Cleanup intel_dp_aux_vesa_enable_backlight() a bit
Date: Fri, 12 Feb 2021 13:28:35 +0200 [thread overview]
Message-ID: <87h7mhcyos.fsf@intel.com> (raw)
In-Reply-To: <20210208233902.1289693-6-lyude@redhat.com>
On Mon, 08 Feb 2021, Lyude Paul <lyude@redhat.com> wrote:
> Get rid of the extraneous switch case in here, and just open code
> edp_backlight_mode as we only ever use it once.
>
> v4:
> * Check that backlight mode is DP_EDP_BACKLIGHT_CONTROL_MODE_DPCD, not
> DP_EDP_BACKLIGHT_CONTROL_MODE_MASK - imirkin
>
> Signed-off-by: Lyude Paul <lyude@redhat.com>
> ---
> .../gpu/drm/i915/display/intel_dp_aux_backlight.c | 15 ++-------------
> 1 file changed, 2 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
> index c37ccc8538cb..57218faed4a3 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
> @@ -382,7 +382,7 @@ intel_dp_aux_vesa_enable_backlight(const struct intel_crtc_state *crtc_state,
> struct intel_dp *intel_dp = intel_attached_dp(connector);
> struct drm_i915_private *i915 = dp_to_i915(intel_dp);
> struct intel_panel *panel = &connector->panel;
> - u8 dpcd_buf, new_dpcd_buf, edp_backlight_mode;
> + u8 dpcd_buf, new_dpcd_buf;
> u8 pwmgen_bit_count = panel->backlight.edp.vesa.pwmgen_bit_count;
>
> if (drm_dp_dpcd_readb(&intel_dp->aux,
> @@ -393,12 +393,8 @@ intel_dp_aux_vesa_enable_backlight(const struct intel_crtc_state *crtc_state,
> }
>
> new_dpcd_buf = dpcd_buf;
> - edp_backlight_mode = dpcd_buf & DP_EDP_BACKLIGHT_CONTROL_MODE_MASK;
>
> - switch (edp_backlight_mode) {
> - case DP_EDP_BACKLIGHT_CONTROL_MODE_PWM:
> - case DP_EDP_BACKLIGHT_CONTROL_MODE_PRESET:
> - case DP_EDP_BACKLIGHT_CONTROL_MODE_PRODUCT:
> + if ((dpcd_buf & DP_EDP_BACKLIGHT_CONTROL_MODE_MASK) != DP_EDP_BACKLIGHT_CONTROL_MODE_DPCD) {
> new_dpcd_buf &= ~DP_EDP_BACKLIGHT_CONTROL_MODE_MASK;
> new_dpcd_buf |= DP_EDP_BACKLIGHT_CONTROL_MODE_DPCD;
>
> @@ -406,13 +402,6 @@ intel_dp_aux_vesa_enable_backlight(const struct intel_crtc_state *crtc_state,
> pwmgen_bit_count) != 1)
What baseline is this on? None that I can think of have the above != 1,
they're all < 0 AFAICT.
BR,
Jani.
> drm_dbg_kms(&i915->drm,
> "Failed to write aux pwmgen bit count\n");
> -
> - break;
> -
> - /* Do nothing when it is already DPCD mode */
> - case DP_EDP_BACKLIGHT_CONTROL_MODE_DPCD:
> - default:
> - break;
> }
>
> if (panel->backlight.edp.vesa.pwm_freq_pre_divider) {
--
Jani Nikula, Intel Open Source Graphics Center
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next prev parent reply other threads:[~2021-02-12 11:28 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-08 23:38 [Nouveau] [RFC v4 00/11] drm: Extract DPCD backlight helpers from i915, add support in nouveau Lyude Paul
2021-02-08 23:38 ` [Nouveau] [RFC v4 01/11] drm/nouveau/kms/nv40-/backlight: Assign prop type once Lyude Paul
2021-02-08 23:38 ` [Nouveau] [RFC v4 02/11] drm/nouveau/kms: Don't probe eDP connectors more then once Lyude Paul
2021-02-08 23:38 ` [Nouveau] [RFC v4 03/11] drm/i915/dpcd_bl: Remove redundant AUX backlight frequency calculations Lyude Paul
2021-02-08 23:38 ` [Nouveau] [RFC v4 04/11] drm/i915/dpcd_bl: Handle drm_dpcd_read/write() return values correctly Lyude Paul
2021-02-08 23:38 ` [Nouveau] [RFC v4 05/11] drm/i915/dpcd_bl: Cleanup intel_dp_aux_vesa_enable_backlight() a bit Lyude Paul
2021-02-11 3:56 ` Rodrigo Vivi
2021-02-12 11:28 ` Jani Nikula [this message]
2021-02-08 23:38 ` [Nouveau] [RFC v4 06/11] drm/i915/dpcd_bl: Cache some backlight capabilities in intel_panel.backlight Lyude Paul
2021-02-08 23:38 ` [Nouveau] [RFC v4 07/11] drm/i915/dpcd_bl: Move VESA backlight enabling code closer together Lyude Paul
2021-02-08 23:38 ` [Nouveau] [RFC v4 08/11] drm/i915/dpcd_bl: Return early in vesa_calc_max_backlight if we can't read PWMGEN_BIT_COUNT Lyude Paul
2021-02-11 3:52 ` [Nouveau] [Intel-gfx] " Rodrigo Vivi
2021-02-08 23:38 ` [Nouveau] [RFC v4 09/11] drm/i915/dpcd_bl: Print return codes for VESA backlight failures Lyude Paul
2021-02-11 3:47 ` [Nouveau] [Intel-gfx] " Rodrigo Vivi
2021-02-08 23:39 ` [Nouveau] [RFC v4 10/11] drm/dp: Extract i915's eDP backlight code into DRM helpers Lyude Paul
2021-02-11 4:15 ` [Nouveau] [Intel-gfx] " Rodrigo Vivi
2021-02-11 18:35 ` Lyude Paul
2021-02-12 22:15 ` Lyude Paul
2021-02-18 8:35 ` Jani Nikula
2021-02-18 15:31 ` Ville Syrjälä
2021-02-19 21:14 ` Lyude Paul
2021-02-08 23:39 ` [Nouveau] [RFC v4 11/11] drm/nouveau/kms/nv50-: Add basic DPCD backlight support for nouveau Lyude Paul
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